ADELPHIA COMMUNICATIONS CORP
S-3, 1999-05-07
CABLE & OTHER PAY TELEVISION SERVICES
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<PAGE>
 
      As filed with the Securities and Exchange Commission on May 7, 1999
                                                      Registration No. 333-
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
                      SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, D.C. 20549
                                --------------
                                   FORM S-3
                            REGISTRATION STATEMENT
                       Under THE SECURITIES ACT OF 1933
                                --------------
                      ADELPHIA COMMUNICATIONS CORPORATION
            (Exact name of registrant as specified in its charter)
 
<TABLE>
<S>  <C>
        Delaware                   4841                   23-2417713
     (State or other         (Primary Standard         (I.R.S. Employer
     jurisdiction of            Industrial            Identification No.)
    incorporation or        Classification Code
      organization)               Number)
</TABLE>
                             MAIN AT WATER STREET
                        COUDERSPORT, PENNSYLVANIA 16915
                                (814) 274-9830
  (Address, including zip code, and telephone number, including area code, of
                   registrant's principal executive offices)
                                --------------
                             COLIN HIGGIN, ESQUIRE
                            DEPUTY GENERAL COUNSEL
                      ADELPHIA COMMUNICATIONS CORPORATION
                             MAIN AT WATER STREET
                        COUDERSPORT, PENNSYLVANIA 16915
                                (814) 274-9830
(Name, address, including zip code, and telephone number, including area code,
                             of agent for service)
                                --------------
                PLEASE ADDRESS A COPY OF ALL COMMUNICATIONS TO:
                      CARL E. ROTHENBERGER, JR., ESQUIRE
                  BUCHANAN INGERSOLL PROFESSIONAL CORPORATION
                         21ST FLOOR, 301 GRANT STREET
                        PITTSBURGH, PENNSYLVANIA 15219
                                (412) 562-8826
 
  APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC: From time
to time after the effective date of this Registration Statement.
  If the only securities being registered on this Form are being offered
pursuant to dividend or interest reinvestment plans, please check the
following box. [_]
  If any of the securities being registered on this Form are being offered on
a delayed or continuous basis pursuant to Rule 415 under the Securities Act of
1933, other than securities offered only in connection with dividend or
interest reinvestment plans, check the following box. [X]
  If this Form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following
box and list the Securities Act registration statement number of the earlier
effective registration statement for the same offering. [_]
  If this Form is a post-effective amendment filed pursuant to Rule 462(c)
under the Securities Act, check the following box and list the Securities Act
registration statement number of the earlier effective registration statement
for the same offering. [_]
  If delivery of the prospectus is expected to be made pursuant to Rule 434,
please check the following box. [_]
                                --------------
                        CALCULATION OF REGISTRATION FEE
<TABLE>
- ----------------------------------------------------------------------------------
- ----------------------------------------------------------------------------------
<CAPTION>
     Title of each class of            Proposed maximum            Amount of
  securities to be registered     aggregate offering price(1)  registration fee(1)
- ----------------------------------------------------------------------------------
<S>                               <C>                         <C>
Debt Securities.................              --                       --
- ----------------------------------------------------------------------------------
Preferred Stock (par value $.01
 per share).....................              --                       --
- ----------------------------------------------------------------------------------
Debt Securities, Preferred
Stock, Class A Common Stock (par
value $.01 per share) and Class
B Common Stock (par value $.01
per share) issuable upon
conversion of any convertible
Debt Securities, Preferred Stock
or Class B Common Stock(2)......              --                       --
- ----------------------------------------------------------------------------------
Class A Common Stock (par value
 $.01 per share)................              --                       --
- ----------------------------------------------------------------------------------
Class B Common Stock (par value
 $.01 per share)................              --                       --
- ----------------------------------------------------------------------------------
  TOTAL.........................        $4,601,880,000(3)          $1,279,323
- ----------------------------------------------------------------------------------
- ----------------------------------------------------------------------------------
</TABLE>
(1)  Estimated solely for the purpose of calculating the amount of the
     registration fee pursuant to Rule 457(o) under the Securities Act of
     1933, as amended (the "Securities Act"). There are being registered an
     indeterminate number of Debt Securities, Preferred Stock, Class A Common
     Stock and Class B Common Stock of Adelphia Communications Corporation.
     The aggregate public offering price of the Debt Securities, Preferred
     Stock, Class A Common Stock and Class B Common Stock of Adelphia
     Communications Corporation registered hereby will not exceed
     $4,601,880,000.
(2)  Consists of such indeterminate amount of Debt Securities and number of
     shares of such Class A Common Stock, Class B Common Stock or Preferred
     Stock of Adelphia Communications Corporation issuable pursuant to any
     conversion rights which are part of the Debt Securities, Preferred Stock
     and Class B Common Stock of Adelphia Communications Corporation sold
     pursuant to this Registration Statement.
(3)  The aggregate initial offering price of all securities registered
     pursuant to this Registration Statement and offered from time to time
     will not exceed $4,601,880,000. An additional $1,350,000,000 of
     securities was previously registered on a Registration Statement on Form
     S-3 (No. 333-74219) for which a registration fee in the amount of
     $375,000 was previously paid. Of that $1,350,000,000, $398,120,000 of
     securities remains unissued as of May 7, 1999. The previously registered
     securities may also be sold pursuant to the prospectus contained herein.
     Any securities registered hereunder or under Registration Statement on
     Form S-3 (No. 333-74219) may be sold separately or with other securities
     registered hereunder or thereunder. Pursuant to Rule 429 of the rules and
     regulations of the Securities and Exchange Commission under the
     Securities Act of 1933 the combined prospectus contained herein also
     relates to the Registration Statement on Form S-3 (No. 333-74219).
                                --------------
   The Registrant hereby amends this Registration Statement on such date or
dates as may be necessary to delay its effective date until the Registrant
shall file a further amendment which specifically states that this
Registration Statement shall thereafter become effective in accordance with
Section 8(a) of the Securities Act of 1933 or until the Registration Statement
shall become effective on such date as the Commission, acting pursuant to said
Section 8(a), may determine.
   This Registration Statement has been filed pursuant to Rule 429 and relates
to a previously filed registration statement on Form S-3 (No. 333-74219).
 
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
<PAGE>
 
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+   The information in the prospectus is not complete and may be changed. We   +
+may not sell these securities until the registration statement filed with the +
+SEC is effective. This prospectus is not an offer to sell these securities    +
+and it is not soliciting an offer to buy these securities in any state where  +
+the offer or sale is prohibited.                                              +
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
                             SUBJECT TO COMPLETION
                    PRELIMINARY PROSPECTUS DATED MAY 7, 1999
 
                                   Prospectus
 
                      ADELPHIA COMMUNICATIONS CORPORATION
 
                                Debt Securities
                                Preferred Stock
                              Class A Common Stock
                              Class B Common Stock
 
This prospectus relates to:
 
 .  Adelphia Communications Corporation's debentures, notes and other debt
   securities in one or more series which may be senior debt securities or
   subordinated debt securities,
 
 .  shares of preferred stock of Adelphia issuable in series designated by the
   board of directors of Adelphia,
 
 .  shares of Class A common stock, and
 
 .  shares of Class B common stock, which may be offered in combination or
   separately from time to time by Adelphia.
 
  The aggregate initial offering price of all of the securities which may be
sold pursuant to this prospectus will not exceed U.S. $5,000,000,000, or its
equivalent based on the applicable exchange rate at the time of issue in one or
more foreign currencies or currency units as shall be designated by Adelphia.
 
  The Class A common stock is quoted on the Nasdaq National Market. The Class A
common stock's ticker symbol is "ADLAC." On May 6, 1999, the closing sale price
on the Nasdaq National Market of a single share of Class A common stock was
$75.25.
 
  Our common stock includes Class A and Class B common stock. The rights of
holders of the Class A common stock and Class B common stock differ with
respect to certain aspects of dividends, liquidations and voting. The Class A
common stock has preferential rights with respect to cash dividends and
distributions upon the liquidation of Adelphia. Holders of Class B common stock
are entitled to greater voting rights than the holders of Class A common stock;
however, the holders of Class A common stock, voting as a separate class, are
entitled to elect one of Adelphia's directors.
 
  You should carefully review "Risk Factors" beginning on page 4 for a
discussion of things you should consider when investing in securities of
Adelphia.
 
                                  -----------
 
  Neither the SEC nor any state securities commission has approved or
disapproved of these securities or passed upon the adequacy or accuracy of this
prospectus. Any representation to the contrary is a criminal offense.
 
  This Prospectus May Not Be Used To Consummate Sales Of Securities Unless
Accompanied By A Prospectus Supplement.
 
                                  -----------
 
                 The date of this Prospectus is        , 1999.
<PAGE>
 
                               TABLE OF CONTENTS
 
<TABLE>
<S>                                                                          <C>
Adelphia...................................................................    2
 
Risk Factors...............................................................    4
 
Ratio of Earnings to Combined Fixed Charges and Preferred Stock Dividends..   16
 
Dilution...................................................................   17
 
Use of Proceeds............................................................   17
 
Description of Debt Securities.............................................   18
 
Description of Capital Stock...............................................   31
 
Book Entry Issuance........................................................   36
 
Plan of Distribution.......................................................   38
 
Where You Can Find More Information........................................   40
 
Legal Matters..............................................................   41
 
Experts....................................................................   42
</TABLE>
<PAGE>
 
 
                                    ADELPHIA
 
   Adelphia is a leader in the telecommunications industry with cable
television and local telephone operations. Our operations consist of providing
telecommunications services primarily over our networks, which are commonly
referred to as broadband networks because they can transmit large quantities of
voice, video and data by way of digital or analog signals. As of December 31,
1998, we owned or managed cable television systems with broadband networks that
passed in front of 3,252,830 homes and served 2,304,325 basic subscribers. John
J. Rigas, the Chairman, President, Chief Executive Officer and founder of
Adelphia, has owned and operated cable television systems since 1952.
 
   We own cable systems in twelve states which are organized into seven
regional clusters: Western New York, Virginia, Western Pennsylvania, New
England, Eastern Pennsylvania, Ohio and New Jersey. These systems are located
primarily in suburban areas of large and medium-sized cities within the 50
largest television markets. As of December 31, 1998, the broadband networks for
these systems passed in front of 2,131,978 homes and served 1,528,307 basic
subscribers.
 
   We also provide management and consulting services to other partnerships and
corporations engaged in the ownership and operation of cable television
systems. John J. Rigas and members of his immediate family, including entities
they own or control, have substantial ownership interests in these partnerships
and corporations. As of December 31, 1998, the broadband networks for cable
systems owned by these Rigas family partnerships and corporations passed in
front of 177,250 homes and served 134,443 basic subscribers.
 
   We also own a 50% voting interest and nonvoting preferred limited
partnership interests in Olympus Communications, L.P. Olympus is a joint
venture limited partnership that operates a large cable system in Florida. As
of December 31, 1998, the broadband networks for this system passed in front of
943,602 homes and served 641,575 basic subscribers.
 
   Through our subsidiary, Hyperion Telecommunications, Inc., we own and
operate a large competitive local exchange carrier in the eastern United
States. This means that Hyperion provides its customers with alternatives to
the incumbent local telephone company for local telephone and
telecommunications services. Hyperion's telephone operations are referred to as
being facilities based, which means it generally owns the local
telecommunications networks and facilities it uses to deliver these services,
rather than leasing or renting the use of another party's networks to do so. As
of December 31, 1998, Hyperion managed and operated 22 telecommunications
networks, including two under construction, serving 46 markets. Hyperion's
Class A common stock is listed on the Nasdaq National Market under the symbol
"HYPT."
 
   Our executive offices are located at Main at Water Street, Coudersport,
Pennsylvania 16915, and our telephone number is (814) 274-9830.
 
                                       2
<PAGE>
 
 
Recent Developments
 
   Please see the applicable prospectus supplement and Adelphia's recent public
filings for recent developments.
 
                                       3
<PAGE>
 
                                  RISK FACTORS
 
   Before you invest in Adelphia's securities, you should be aware that there
are various risks, including those described below. You should consider
carefully these risk factors together with all of the other information
included in this prospectus before you decide to purchase any securities of
Adelphia.
 
High Level Of
Indebtedness
 
   As of December 31,      Adelphia has a substantial amount of debt. We
1998, we owed              borrowed this money to purchase and to expand our
approximately $3.5         cable systems and other operations and, to a lesser
billion. Our high level    extent, for investments and loans to our
of indebtedness can have   affiliates. At December 31, 1998, our indebtedness
important adverse          totaled approximately $3,527,452,000. This included
consequences to us and     approximately:
to you.
 
                              .  $1,810,212,000 of Adelphia Parent Company
                                 public debt. When we use the term "Adelphia
                                 Parent Company" in this prospectus, we are
                                 referring only to Adelphia Communications
                                 Corporation as a parent holding company
                                 entity, and not to its subsidiaries;
 
                              .  $1,246,456,000 of debt owed by our
                                 subsidiaries to banks, other financial
                                 institutions and other persons; and
 
                              .  $470,784,000 of public debt owed by Hyperion.
 
   Debt service consumes   Our high level of indebtedness can have important
a substantial portion of   adverse consequences to us and to you. It requires
the cash we generate.      that we spend a substantial portion of the cash we
This could affect our      get from our business to repay the principal and
ability to invest in our   interest on these debts. Otherwise, we could use
business in the future     these funds for general corporate purposes or for
as well as to react to     capital improvements. Our ability to obtain new
changes in our industry    loans for working capital, capital expenditures,
or economic downturns.     acquisitions or capital improvements may be limited
                           by our current level of debt. In addition, having
                           such a high level of debt could limit our ability
                           to react to changes in our industry and to economic
                           conditions generally. In addition to our debt, at
                           December 31, 1998, the Adelphia Parent Company also
                           had approximately $148,191,000 and Hyperion had
                           approximately $228,674,000 of redeemable
                           exchangeable preferred stock which contain payment
                           obligations that are
 
                                       4
<PAGE>
 
                           similar to our debt obligations in these respects.
                           Olympus also has a substantial amount of debt.
 
   Approximately 32% of    Our debt comes due at various times up to the year
this debt must be paid     2009, including an aggregate of approximately
by April 1, 2003 and all   $1,126,169,000 which, as of December 31, 1998, we
of it must be paid by      must pay by April 1, 2003.
2009.
 
Our Business Requires      Our business requires substantial additional
Substantial Additional     financing on a continuing basis for capital
Financing And If We Do     expenditures and other purposes including:
Not Obtain That
Financing We May Not Be
Able To Upgrade Our
Plant, Offer Services,
Make Payments When Due
Or Refinance Existing
Debt.
 
                              .  constructing and upgrading our plant and
                                 networks--some of these upgrades we must make
                                 to comply with the requirements of local
                                 cable franchise authorities;
 
                              .  offering new services;
 
                              .  scheduled principal and interest payments;
 
                              .  refinancing existing debt; and
 
                              .  acquisitions and investments.
 
                           There can be no guarantee that we will be able to
                           issue additional debt or sell stock or other
                           additional equity on satisfactory terms, or at all,
                           to meet our future financing needs.
 
We Have Had Large Losses   The Total Convertible Preferred Stock, Common Stock
And Negative               and Other Stockholders' Equity (Deficiency) at
Stockholders' Equity And   December 31, 1998 was a deficit of approximately
We Expect This To          $1,021,746,000. Our continuing net losses, which
Continue                   are mainly due to our high levels of depreciation
                           and amortization and interest expense, have created
                           this deficiency. Our recent net losses applicable
                           to our common stockholders were approximately as
                           follows for the periods specified:
 
                              .  fiscal year ended March 31, 1996--
                                 $119,894,000;
 
                              .  fiscal year ended March 31, 1997--
                                 $130,642,000;
 
                              .  fiscal year ended March 31, 1998--
                                 $192,729,000; and
 
                              .  nine months ended December 31, 1998--
                                 $135,848,000.
 
                                       5
<PAGE>
 
                           We expect to continue to incur large net losses for
                           the next several years.
 
   Our earnings have       Our earnings could not pay for our combined fixed
been insufficient to pay   charges and preferred stock dividends during these
for our fixed charges      periods by the amounts set forth in the table
and preferred stock        below, although combined fixed charges and
dividends.                 preferred stock dividends included substantial non-
                           cash charges for depreciation, amortization and
                           non-cash interest expense on some of our debts and
                           the non-cash expense of Hyperion's preferred stock
                           dividends:
 
<TABLE>
<CAPTION>
                                         Earnings     Non-Cash
                                        Deficiency    Charges
                                       ------------ ------------
                 <S>                   <C>          <C>
                 .  fiscal year ended
                    March 31, 1996     $ 78,189,000 $127,319,000
                 .  fiscal year ended
                    March 31, 1997     $ 61,848,000 $165,426,000
                 .  fiscal year ended
                    March 31, 1998     $113,941,000 $195,153,000
                 .  nine months ended
                    December 31, 1998  $116,899,000 $186,022,000
</TABLE>
 
                           Historically, the cash we generate from our
   If we could not         operating activities and borrowings has been
refinance our debt or      sufficient to meet our requirements for debt
obtain new loans, we       service, working capital, capital expenditures, and
would likely have to       investments in and advances to our affiliates, and
consider various options   we have depended on getting additional borrowings
such as the sale of        to meet our liquidity requirements. Although in the
additional equity or       past we have been able both to refinance our debt
some of our assets to      and to obtain new debt, there can be no guarantee
meet the principal and     that we will be able to continue to do so in the
interest payments we       future or that the cost to us or the other terms
owe, negotiate with our    which would affect us would be as favorable to us
lenders to restructure     as our current loans and credit agreements. We
existing loans or          believe that our business will continue to generate
explore other options      cash and that we will be able to obtain new loans
available under            to meet our cash needs. However, the covenants in
applicable laws            the indentures and credit agreements for our
including those under      current debt limit our ability to borrow more
reorganization or          money.
bankruptcy laws. We can
not guarantee that any
options available to us
would enable us to repay
our debt in full.
 
 
                                       6
<PAGE>
 
Competition
 
   Our cable television    The telecommunications services provided by
business is subject to     Adelphia are subject to strong competition and
strong competition from    potential competition from various sources. Our
several sources which      cable television systems compete with other means
could adversely affect     of distributing video to home televisions such as
revenue or revenue         Direct Broadcast Satellite systems, commonly known
growth.                    as DBS systems, and Multichannel Multipoint
                           Distribution systems. Some of the regional Bell
                           telephone operating companies and other local
                           telephone companies are in the process of entering
                           the video-to-home business and several have
                           expressed their intention to enter the video-to-
                           home business. In addition, some regional Bell
                           operating companies and local telephone companies
                           have facilities which are capable of delivering
                           cable television service. The equipment which
                           telephone companies use in providing local exchange
                           service may give them competitive advantages over
                           us in distributing video to home televisions. The
                           regional Bell operating companies and other
                           potential competitors have much greater resources
                           than Adelphia and would constitute formidable
                           competition for our cable television business. We
                           cannot predict either the extent to which
                           competition will continue to materialize or, if
                           such competition materializes, the extent of its
                           effect on our cable television business.
 
                           We also face competition from other communications
                           and entertainment media, including conventional
                           off-air television broadcasting services,
                           newspapers, movie theaters, live sporting events
                           and home video products. We cannot predict the
                           extent to which competition may affect us.
 
   Hyperion's operations   In each of the markets served by Hyperion's
are also subject to risk   networks, the competitive local exchange carrier
because Hyperion           services offered by Hyperion compete principally
competes principally       with the services offered by the incumbent local
with established local     telephone exchange carrier company serving that
telephone carriers that    area. Local telephone companies have long-standing
have long-standing         relationships with their customers, have the
utility relationships      potential to subsidize competitive services from
with their customers and   monopoly service revenues, and benefit from
pricing flexibility for    favorable state and federal regulations. The merger
local telephone            of Bell Atlantic and NYNEX created a very large
services.                  company whose combined territory covers a
                           substantial portion of Hyperion's markets. Other
                           combinations are occurring in the industry, which
                           may have a material adverse effect on Hyperion and
                           us.
 
                                       7
<PAGE>
 
                           We believe that local telephone companies will gain
                           increased pricing flexibility from regulators as
                           competition increases. Hyperion's operating results
                           and cash flow could be materially and adversely
                           affected by actions by regulators, including
                           permitting the incumbent local telephone companies
                           in Hyperion's markets to do the following:
 
                              .  lower their rates substantially;
 
                              .  engage in aggressive volume and term discount
                                 pricing practices for their customers; or
 
                              .  charge excessive fees to Hyperion for
                                 interconnection to the incumbent local
                                 telephone company's networks.
 
   If the regional Bell    The regional Bell operating companies can now
telephone companies        obtain regulatory approval to offer long distance
could get regulatory       services if they comply with the interconnection
approval to offer long     requirements of the federal Telecommunications Act
distance service in        of 1996. To date, the FCC has denied the requests
competition with           for approval filed by regional Bell operating
Hyperion's significant     companies in Hyperion's operating areas. However,
customers, some of         an approval of such a request could result in
Hyperion's major           decreased market share for the major long distance
customers could lose       carriers which are among Hyperion's significant
market share.              customers. This could have a material adverse
                           effect on Hyperion.
 
   The regional Bell       Some of the Regional Bell operating companies have
telephone companies        also recently filed petitions with the FCC
continue to seek other     requesting waivers of other obligations under the
regulatory approvals       federal Telecommunications Act of 1996. These
that could significantly   involve services Hyperion also provides such as
enhance their              high speed data, long distance, and services to
competitive position       Internet Service Providers. If the FCC grants the
against Hyperion.          regional Bell operating companies' petitions, this
                           could have a material adverse effect on Hyperion.
 
   Potential competitors   Potential competitors for Hyperion include other
to Hyperion's              competitive local exchange carriers, incumbent
telecommunications         local telephone companies which are not subject to
services include the       regional Bell operating companies' restrictions on
regional Bell telephone    offering long distance service, AT&T, MCIWorldCom,
companies, AT&T,           Sprint and other long distance carriers, cable
MCIWorldCom and Sprint,    television companies, electric utilities, microwave
electric utilities and     carriers, wireless telecommunications providers and
other companies that       private networks built by large end users. Both
have advantages over       AT&T and MCIWorldCom have announced that they have
Hyperion.                  begun to offer local telephone services in some
                           areas of the country, and AT&T recently announced a
                           new wireless technology
 
                                       8
<PAGE>
 
                           for providing local telephone service. AT&T and
                           Tele-Communications, Inc. have merged. Although
                           Hyperion has good relationships with the long
                           distance carriers, they could build their own
                           facilities, purchase other carriers or their
                           facilities, or resell the services of other
                           carriers rather than use Hyperion's services when
                           entering the market for local exchange services.
 
                           Many of Hyperion's current and potential
                           competitors, particularly incumbent local telephone
                           companies, have financial, personnel and other
                           resources substantially greater than those of
                           Hyperion, as well as other competitive advantages
                           over Hyperion.
 
We Are Subject To
Extensive Regulation
 
   Our cable television    The cable television industry and the provision of
and telecommunications     local telephone exchange services are subject to
businesses are heavily     extensive regulation at the federal, state and
regulated as to rates we   local levels, and many aspects of such regulation
can charge and other       are currently the subject of judicial proceedings
matters. This regulation   and administrative or legislative proposals. In
could limit our ability    particular, the FCC adopted regulations that limit
to increase rates, cause   our ability to set and increase rates for our basic
us to decrease then        and cable programming service packages and for the
current rates or require   provision of cable television-related equipment.
us to refund previously    The law permits certified local franchising
collected fees.            authorities to order refunds of rates paid in the
                           previous twelve-month period determined to be in
                           excess of the permitted reasonable rates. It is
                           possible that rate reductions or refunds of
                           previously collected fees may be required in the
                           future.
 
                           The cable television industry is subject to state
                           and local regulations and we must comply with rules
                           of the local franchising authorities to retain and
                           renew our cable franchises, among other matters.
                           There can be no assurances that the franchising
                           authorities will not impose new and more
                           restrictive requirements as a condition to
                           franchise renewal.
 
                                       9
<PAGE>
 
   The federal
Telecommunications Act     The federal Telecommunications Act of 1996
of 1996 may have a         substantially changed federal, state and local laws
significant impact on      and regulations governing our cable television and
our cable television and   telecommunications businesses. This law could
telephone businesses.      materially affect the growth and operation of the
                           cable television industry and the cable services we
                           provide. Although this legislation may lessen
                           regulatory burdens, the cable television industry
                           may be subject to new competition as a result.
                           There are numerous rulemakings that have been and
                           continue to be undertaken by the FCC which will
                           interpret and implement the provisions of this law.
                           Furthermore, portions of this law have been, and
                           likely other portions will be, challenged in the
                           courts. We cannot predict the outcome of such
                           rulemakings or lawsuits or the shortand long-term
                           effect, financial or otherwise, of this law and FCC
                           rulemakings on us.
 
                           Similarly, the Telecommunications Act of 1996
                           removes entry barriers for all companies and could
                           increase substantially the number of competitors
                           offering comparable services in Hyperion's markets
                           or potential markets. Furthermore, we cannot
                           guarantee that rules adopted by the FCC or state
                           regulators or other legislative or judicial
                           initiatives relating to the telecommunications
                           industry will not have a material adverse effect on
                           Hyperion.
 
Unequal Voting Rights Of   Adelphia has two classes of common stock--Class A
Stockholders               which carries one vote per share and Class B which
                           carries ten votes per share. Under our Certificate
                           of Incorporation, the Class A shares elect only one
                           of our directors.
 
Control Of Voting Power    As of May 1, 1999, the Rigas family beneficially
By The Rigas Family        owned outstanding shares representing about 42% of
                           the total number of outstanding shares of both
                           classes of Adelphia's common stock and about 77% of
                           the total voting power of Adelphia's shares. The
                           public holds a majority of the outstanding Class A
                           shares, although the Rigas family also owns about
                           30% of those shares as of May 1, 1999. The Rigas
                           family owns about 99% of Adelphia's Class B shares.
                           The Rigas family also owns shares of Adelphia's 8
                           1/8% Series C Cumulative Convertible preferred
                           stock which, if converted, would increase its
                           voting power and beneficial ownership. The Rigas
                           family also has agreed to acquire 4,114,549 shares
                           of Class B common stock, and has rights to acquire
                           up to an additional 2,057,275 shares of Class B
 
   The Rigas family can
control stockholder
decisions on very
important matters.
 
                                       10
<PAGE>
 
                           common stock. As a result of the Rigas family's
                           stock ownership and an agreement among the Class B
                           stockholders, members of the Rigas family as of May
                           1, 1999 have the power to elect seven of eight
                           Adelphia directors, and if they converted their
                           convertible preferred stock might be able to elect
                           all eight directors. In addition, the Rigas family
                           could control stockholder decisions on other
                           matters such as amendments to our Certificate of
                           Incorporation and Bylaws, and mergers or other
                           fundamental corporate transactions.
 
There Are Potential        John J. Rigas and the other executive officers of
Conflicts Of Interest      Adelphia, including other members of the Rigas
Between Adelphia And The   family, own other corporations and partnerships,
Rigas Family               which are managed by us for a fee. Subject to the
                           restrictions contained in a business opportunity
                           agreement regarding future acquisitions, Rigas
                           family members and the executive officers are free
                           to continue to own these interests and acquire
                           additional interests in cable television systems.
                           These activities could present a conflict of
                           interest with us, such as how much time our
                           executive officers devote to our business. In
                           addition, there have been and will continue to be
                           transactions between us and the executive officers
                           or the other entities they own or have affiliations
                           with. Our public debt indentures contain covenants
                           that place some restrictions on transactions
                           between us and our affiliates.
 
Holding Company            The Adelphia Parent Company directly owns no
Structure And Potential    significant assets other than stock, partnership
Impact Of Restrictive      interests, equity and other interests in our
Covenants In Subsidiary    subsidiaries and in other companies. This creates
Debt Agreements            risks regarding our ability to provide cash to the
                           Adelphia Parent Company to repay the interest and
                           principal which it owes, our ability to pay cash
                           dividends to our common stockholders in the future,
                           and the ability of our subsidiaries and other
                           companies to respond to changing business and
                           economic conditions and to get new loans.
 
   The Adelphia Parent     The public indentures, and the credit agreements
Company depends on its     for bank and other financial institution loans, of
subsidiaries and other     our subsidiaries and other companies restrict their
companies in which it      ability and the ability of the companies they own
has investments, to fund   to make payments to the Adelphia Parent Company.
its cash needs.            These agreements also place other restrictions on
                           the borrower's ability to borrow new funds and
                           include requirements for the borrowers to remain in
 
                                       11
<PAGE>
 
                           compliance with the loans. The ability of a
                           subsidiary or a company in which we have invested
                           to comply with debt restrictions may be affected by
                           events that are beyond our control. The breach of
                           any of these covenants could result in a default
                           which could result in all loans and other amounts
                           owed to its lenders, to be due and payable. Our
                           subsidiaries and companies in which we have
                           invested might not be able to repay in full the
                           accelerated loans.
 
It Is Unlikely You Will    Adelphia has never declared or paid cash dividends
Receive A Return On Your   on any of its common stock and has no intention of
Shares Through The         doing so in the foreseeable future. As a result, it
Payment Of Cash            is unlikely that you will receive a return on your
Dividends                  shares through the payment of cash dividends.
 
Future Sales Of            Sales of a substantial number of shares of Class A
Outstanding Common Stock   common stock or Class B common stock, including
Could Adversely Affect     sales by any pledgees of such shares, could
The Market Price Of Our    adversely affect the market price of our Class A
Common Stock               common stock and could impair our ability in the
                           future to raise capital through stock offerings.
                           Under various registration rights agreements or
                           arrangements, as of May 1, 1999, the Rigas family
                           has the right, subject to some limitations, to
                           require Adelphia to register substantially all of
                           the shares which it owns of the Class A common
                           stock--15,029,119 shares, Class B common stock--
                           10,736,544 shares and the equivalent number of
                           shares of Class A common stock into which they may
                           be converted, and convertible preferred stock--
                           80,000 shares and the 9,433,962 shares of Class A
                           common stock into which they may be converted.
                           Among others, Adelphia has registered or agreed to
                           register for public sale the following shares:
 
                              .  for the Rigas family--up to 11,000,000 shares
                                 of Class A common stock, 80,000 shares of
                                 convertible preferred stock and the Class A
                                 common stock issuable upon conversion of the
                                 convertible preferred stock;
 
                              .  for Booth American Company--3,571,428 shares
                                 of Class A common stock owned as of March 24,
                                 1998;
 
                                       12
<PAGE>
 
                              .  for the selling stockholders receiving shares
                                 in the Verto Communications, Inc.
                                 acquisition--2,561,024 shares of Class A
                                 common stock;
 
                              .  for a Rigas family partnership--4,000,000
                                 shares of Class A common stock purchased by
                                 it in connection with the January 14, 1999
                                 equity offerings;
 
                              .  for the owners of FrontierVision Partners,
                                 L.P.--7,000,000 shares of Class A common
                                 stock in connection with the FrontierVision
                                 acquisition pending as of May 1, 1999, and
                                 for the benefit of FrontierVision in certain
                                 circumstances if that transaction does not
                                 close, 1,000,000 shares of Class A common
                                 stock; and
 
                              .  in connection with the Century Communications
                                 Corp. acquisition pending as of May 1, 1999,
                                 Adelphia expects to register approximately
                                 48,700,000 shares of Class A common stock.
 
                           Approximately 14,904,000 shares of Class A common
                           stock and up to 80,000 shares of convertible
                           preferred stock, including the underlying Class A
                           common stock, have been pledged in connection with
                           margin loans made to members of the Rigas family.
                           These pledgees could freely sell any shares
                           acquired upon a foreclosure.
 
Purchasers Of Our Common   Persons purchasing common stock will incur
Stock Will Incur           immediate and substantial net tangible book value
Immediate Dilution         dilution.
 
 
Adelphia's Acquisitions    Because we are experiencing a period of rapid
And Expansion Could        expansion through acquisition, the operating
Involve Operational        complexity of Adelphia, as well as the
Risks                      responsibilities of management personnel, have
                           increased. Our ability to manage such expansion
                           effectively will require us to continue to expand
                           and improve our operational and financial systems
                           and to expand, train and manage its employee base.
 
                           The Century, FrontierVision and Harron
                           Communications Corp. acquisitions, all pending as
                           of May 1, 1999, involve the acquisition of
                           companies that have previously operated
                           independently. We may not be able to integrate the
 
                                       13
<PAGE>
 
                           operations of these companies without some level of
                           difficulty, such as the loss of key personnel.
                           There is no guarantee that we will be able to
                           realize the benefits expected from the integration
                           of operations from these transactions.
 
                           Because the cable systems in our pending
                           acquisitions are in the same industry as those of
                           Adelphia, the acquired systems will generally be
                           subject to the same risks as those of Adelphia,
                           such as those relating to competition, regulation,
                           year 2000 issues and technological developments.
 
Year 2000 Issues Present   The year 2000 issue refers to the inability of
Risks To Our Business      computerized systems and technologies to recognize
Operations In Several      and process dates beyond December 31, 1999. This
Ways                       could present risks to the operation of our
                           business in several ways. Our computerized business
                           applications that could be adversely affected by
                           the year 2000 issue include:
 
                              .  information processing and financial
                                 reporting systems;
 
                              .  customer billing systems;
 
                              .  customer service systems;
 
                              .  telecommunication transmission and reception
                                 systems; and
 
                              .  facility systems.
 
                           System failure or miscalculation could result in an
                           inability to process transactions, send invoices,
                           accept customer orders or provide customers with
                           products and services. Although we are evaluating
                           the impact of the year 2000 issue on our business
                           and are seeking to implement necessary solutions,
                           this process has not been completed.
 
                           There can be no assurance that the systems of other
                           companies on which our systems rely will be year
                           2000 ready or timely converted into systems
                           compatible with our systems. Our failure or a
                           third-party's failure to become year 2000 ready, or
                           our inability to become compatible with third
                           parties with which we have a material relationship,
                           may have a material adverse effect on us, including
                           significant service interruption or outages;
                           however, we cannot currently estimate the extent of
                           any such adverse effects.
 
                                       14
<PAGE>
 
Forward-Looking
Statements In This         The statements contained or incorporated by
Prospectus Are Subject     reference in this prospectus that are not
To Risks And               historical facts are "forward-looking statements"
Uncertainties              and can be identified by the use of forward-looking
                           terminology such as "believes," "expects," "may,"
                           "will," "should," "intends" or "anticipates" or the
                           negative thereof or other variations thereon or
                           comparable terminology, or by discussions of
                           strategy that involve risks and uncertainties.
 
                           Certain information set forth or incorporated by
                           reference in this prospectus, including
                           "Management's Discussion and Analysis of Financial
                           Condition and Results of Operations" in Adelphia's
                           1998 Annual Report on Form 10-K and in Adelphia's
                           Form 10-Qs, is forward-looking, such as information
                           relating to the effects of future regulation,
                           future capital commitments and the effects of
                           competition. Such forward-looking information
                           involves important risks and uncertainties that
                           could significantly affect expected results in the
                           future from those expressed in any forward-looking
                           statements made by, or on behalf of, us. These
                           risks and uncertainties include, but are not
                           limited to, uncertainties relating to economic
                           conditions, the availability and cost of capital,
                           acquisitions and divestitures, government and
                           regulatory policies, the pricing and availability
                           of equipment, materials, inventories and
                           programming, technological developments, year 2000
                           issues and changes in the competitive environment
                           in which we operate. Persons reading this
                           prospectus are cautioned that such statements are
                           only predictions and that actual events or results
                           may differ materially. In evaluating such
                           statements, readers should specifically consider
                           the various factors which could cause actual events
                           or results to differ materially from those
                           indicated by such forward-looking statements.
 
                                       15
<PAGE>
 
                RATIO OF EARNINGS TO COMBINED FIXED CHARGES AND
                           PREFERRED STOCK DIVIDENDS
 
   The following table sets forth the ratio of earnings to combined fixed
charges and preferred stock dividends of Adelphia for the periods indicated.
For purposes of calculating the ratio of earnings available to cover combined
fixed charges and preferred stock dividends:
 
  .  earnings consist of loss before income taxes and extraordinary items
     plus fixed charges, excluding capitalized interest, and
 
  .  fixed charges consist of interest, whether expensed or capitalized, plus
     amortization of debt issuance costs plus the assumed interest component
     of rent expense.
 
<TABLE>
<CAPTION>
                        Fiscal Year Ended March 31,
- ----------------------------------------------------------------------------------------------------------
   1994             1995                       1996                       1997                       1998
   -----            -----                      -----                      -----                      -----
   <S>              <C>                        <C>                        <C>                        <C>
     --                --                         --                         --                         --
</TABLE>
 
   For the years ended March 31, 1994, 1995, 1996, 1997 and 1998, and the nine
months ended December 31, 1998, Adelphia's earnings were insufficient to cover
its combined fixed charges and preferred stock dividends by approximately
$65,997,000, $69,146,000, $78,189,000, $61,848,000, $113,941,000, and
$116,899,000, respectively.
 
                                       16
<PAGE>
 
                                    DILUTION
 
   The net tangible book value of Adelphia's common stock as of December 31,
1998 was a deficit of approximately $2,050,905,000 or negative $48.72 a share.
Net tangible book value per share represents the amount of Adelphia's
convertible preferred stock, common stock and other stockholders' equity
(deficiency), less intangible assets, divided by shares of Adelphia's common
stock outstanding. Purchasers of common stock will have an immediate dilution
of net tangible book value which, due to our having a net tangible book value
deficit, will exceed the purchase price per share. For example, in the January
14, 1999 equity offerings, the purchase price of a single share initially sold
to the public was $45.00 and the net tangible book value dilution per share was
$78.53 based on net tangible book value as of December 31, 1998. Net tangible
book value dilution per share represents the difference between the amount per
share paid by purchasers of shares of Class A common stock in an offering by
Adelphia and the pro forma net tangible book value per share of the common
stock immediately after completion of such offering.
 
                                USE OF PROCEEDS
 
   Unless otherwise specified in the applicable prospectus supplement, we
intend to apply the net proceeds from the sale of the securities to which this
prospectus relates to general funds to be used for general corporate purposes
including capital expenditures, acquisitions, the reduction of indebtedness,
investments and other purposes. We may invest funds not required immediately
for such purposes in short-term obligations or we may use them to reduce the
future level of our indebtedness.
 
                                       17
<PAGE>
 
                         DESCRIPTION OF DEBT SECURITIES
 
   The following description sets forth general terms and provisions of the
debt securities to which any prospectus supplement may relate. We will describe
the particular terms and provisions of the series of debt securities offered by
a prospectus supplement, and the extent to which such general terms and
provisions described below may apply thereto, in the prospectus supplement
relating to such series of debt securities.
 
   The senior debt securities are to be issued in one or more series under an
indenture, as supplemented or amended from time to time between Adelphia and an
institution that we will name in the related prospectus supplement, as trustee.
For ease of reference, we will refer to the indenture relating to senior debt
securities as the senior indenture and we will refer to the trustee under that
indenture as the senior trustee. The subordinated debt securities are to be
issued in one or more series under an indenture, as supplemented or amended
from time to time, between Adelphia and an institution that we will name in the
related prospectus supplement, as trustee. For ease of reference, we will refer
to the indenture relating to subordinate debt securities as the subordinate
indenture and we will refer to the trustee under that indenture as the
subordinate trustee. This summary of certain terms and provisions of the debt
securities and the indentures is not necessarily complete, and we refer you to
the copy of the form of the indentures which are filed as an exhibit to the
registration statement of which this prospectus forms a part, and to the Trust
Indenture Act. Whenever we refer to particular defined terms of the indentures
in this Section or in a prospectus supplement, we are incorporating these
definitions into this prospectus or the prospectus supplement.
 
General
 
   The debt securities will be issuable in one or more series pursuant to an
indenture supplemental to the applicable indenture or a resolution of
Adelphia's board of directors or a committee of the board. Unless otherwise
specified in a prospectus supplement, each series of senior debt securities
will rank pari passu in right of payment with all of Adelphia Parent Company's
other senior unsecured obligations. Each series of subordinated debt securities
will be subordinated and junior in right of payment to the extent and in the
manner set forth in the subordinated indenture and the supplemental indenture
relating to that debt. Except as otherwise provided in a prospectus supplement,
the indentures do not limit the incurrence or issuance of other secured or
unsecured debt of Adelphia, whether under the indentures, any other indenture
that Adelphia may enter into in the future or otherwise. For more information,
you should read the prospectus supplement relating to a particular offering of
securities.
 
   The applicable prospectus supplement or prospectus supplements will describe
the following terms of each series of debt securities:
 
  .  the title of the debt securities and whether such series constitutes
     senior debt securities or subordinated debt securities;
 
  .  any limit upon the aggregate principal amount of the debt securities;
 
                                       18
<PAGE>
 
  .  the date or dates on which the principal of the debt securities is
     payable or the method of that determination or the right, if any, of
     Adelphia to defer payment of principal;
 
  .  the rate or rates, if any, at which the debt securities will bear
     interest (including reset rates, if any, and the method by which any
     such rate will be determined), the interest payment dates on which
     interest will be payable and the right, if any, of Adelphia to defer any
     interest payment;
 
  .  the place or places where, subject to the terms of the indenture as
     described below under the caption "--Payment and Paying Agents," the
     principal of and premium, if any, and interest, if any, on the debt
     securities will be payable and where, subject to the terms of the
     indenture as described below under the caption "--Denominations,
     Registration and Transfer," Adelphia will maintain an office or agency
     where debt securities may be presented for registration of transfer or
     exchange and the place or places where notices and demands to or upon
     Adelphia in respect of the debt securities and the indenture may be
     made;
 
  .  any period or periods within, or date or dates on which, the price or
     prices at which and the terms and conditions upon which debt securities
     may be redeemed, in whole or in part, at the option of Adelphia pursuant
     to any sinking fund or otherwise;
 
  .  the obligation, if any, of Adelphia to redeem or purchase the debt
     securities pursuant to any sinking fund or analogous provisions or at
     the option of a holder and the period or periods within which, the price
     or prices at which, the currency or currencies including currency unit
     or units, in which and the other terms and conditions upon which the
     debt securities will be redeemed or purchased, in whole or in part,
     pursuant to such obligation;
 
  .  the denominations in which any debt securities will be issuable if other
     than denominations of $1,000 and any integral multiple thereof;
 
  .  if other than in U.S. Dollars, the currency or currencies, including
     currency unit or units, in which the principal of, and premium, if any,
     and interest, if any, on the debt securities will be payable, or in
     which the debt securities shall be denominated;
 
  .  any additions, modifications or deletions in the events of default or
     covenants of Adelphia specified in the indenture with respect to the
     debt securities;
 
  .  if other than the principal amount, the portion of the principal amount
     of debt securities that will be payable upon declaration of acceleration
     of the maturity thereof;
 
  .  any additions or changes to the indenture with respect to a series of
     debt securities that will be necessary to permit or facilitate the
     issuance of the series in bearer form, registrable or not registrable as
     to principal, and with or without interest coupons;
 
                                       19
<PAGE>
 
  .  any index or indices used to determine the amount of payments of
     principal of and premium, if any, on the debt securities and the manner
     in which such amounts will be determined;
 
  .  subject to the terms described under "--Global Debt Securities," whether
     the debt securities of the series will be issued in whole or in part in
     the form of one or more global securities and, in such case, the
     depositary for the global securities;
 
  .  the appointment of any trustee, registrar, paying agent or agents;
 
  .  the terms and conditions of any obligation or right of Adelphia or a
     holder to convert or exchange debt securities into preferred securities
     or other securities;
 
  .  whether the defeasance and covenant defeasance provisions described
     under the caption "--Satisfaction and Discharge; Defeasance" will be
     inapplicable or modified;
 
  .  any applicable subordination provisions in addition to those set forth
     herein with respect to subordinated debt securities; and
 
  .  any other terms of the debt securities not inconsistent with the
     provisions of the applicable indenture.
 
   We may sell debt securities at a substantial discount below their stated
principal amount, bearing no interest or interest at a rate which at the time
of issuance is below market rates. We will describe material U.S. federal
income tax consequences and special considerations applicable to the debt
securities in the applicable prospectus supplement.
 
   If the purchase price of any of the debt securities is payable in one or
more foreign currencies or currency units or if any debt securities are
denominated in one or more foreign currencies or currency units or if the
principal of, premium, if any, or interest, if any, on any debt securities is
payable in one or more foreign currencies or currency units, we will set forth
the restrictions, elections, material U.S. federal income tax considerations,
specific terms and other information with respect to such issue of debt
securities and such foreign currency or currency units in the applicable
prospectus supplement.
 
   If any index is used to determine the amount of payments of principal,
premium, if any, or interest on any series of debt securities, we will describe
the material U.S. federal income tax, accounting and other considerations
applicable thereto in the applicable prospectus supplement.
 
Denominations, Registration and Transfer
 
   Unless otherwise specified in the applicable prospectus supplement, the debt
securities will be issuable only in registered form, without coupons, in
denominations of $1,000 and any integral multiple thereof. Debt securities of
any series will be exchangeable for other debt securities of the same issue and
series, of any authorized denominations of a like
 
                                       20
<PAGE>
 
aggregate principal amount, the same original issue date, stated maturity and
bearing the same interest rate.
 
   Holders may present each series of debt securities for exchange as provided
above, and for registration of transfer, with the form of transfer endorsed
thereon, or with a satisfactory written instrument of transfer, duly executed,
at the office of the appropriate securities registrar or at the office of any
transfer agent designated by Adelphia for such purpose and referred to in the
applicable prospectus supplement, without service charge and upon payment of
any taxes and other governmental charges as described in the indenture.
Adelphia will appoint the trustee of each series of debt securities as
securities registrar for such series under the indenture. If the applicable
prospectus supplement refers to any transfer agents, in addition to the
securities registrar initially designated by Adelphia with respect to any
series, Adelphia may at any time rescind the designation of any such transfer
agent or approve a change in the location through which any such transfer agent
acts, provided that Adelphia maintains a transfer agent in each place of
payment for the series. Adelphia may at any time designate additional transfer
agents with respect to any series of debt securities.
 
   In the event of any redemption, neither Adelphia nor the trustee will be
required to:
 
  .  issue, register the transfer of or exchange debt securities of any
     series during a period beginning at the opening of business 15 days
     before the day of mailing of a notice for redemption of debt securities
     of that series, and ending at the close of business on the day of
     mailing of the relevant notice of redemption, or
 
  .  transfer or exchange any debt securities so selected for redemption,
     except, in the case of any debt securities being redeemed in part, any
     portion not being redeemed.
 
Global Debt Securities
 
   Unless otherwise specified in the applicable prospectus supplement, the debt
securities of a series may be issued in whole or in part in the form of one or
more global securities that we will deposit with, or on behalf of, a depositary
identified in the prospectus supplement relating to such series. Global debt
securities may be issued only in fully registered form and in either temporary
or permanent form. Unless and until it is exchanged in whole or in part for the
individual debt securities represented by it, a global debt security may not be
transferred except as a whole by the depositary for the global debt security to
a nominee of the depositary or by a nominee of the depositary to the depositary
or another nominee of the depositary or by the depositary or any nominee to a
successor depositary or any nominee of the successor.
 
   The specific terms of the depositary arrangement with respect to a series of
debt securities will be described in the prospectus supplement relating to the
series. Adelphia anticipates that the following provisions will generally apply
to depositary arrangements.
 
   Upon the issuance of a global debt security, and the deposit of the global
debt security with or on behalf of the applicable depositary, the depositary
for the global debt security or
 
                                       21
<PAGE>
 
its nominee will credit on its book-entry registration and transfer system, the
respective principal amounts of the individual debt securities represented by
the global debt security to the accounts of persons, more commonly known as
participants, that have accounts with the depositary. These accounts will be
designated by the dealers, underwriters or agents with respect to the debt
securities or by Adelphia if the debt securities are offered and sold directly
by Adelphia. Ownership of beneficial interests in a global debt security will
be limited to participants or persons that may hold interests through
participants. Ownership of beneficial interests in the global debt security
will be shown on, and the transfer of that ownership will be effected only
through, records maintained by the applicable depositary or its nominee with
respect to interests of participants and the records of participants with
respect to interests of persons who hold through participants. The laws of some
states require that certain purchasers of securities take physical delivery of
the securities in definitive form. These limits and laws may impair the ability
to transfer beneficial interests in a global debt security.
 
   So long as the depositary for a global debt security, or its nominee, is the
registered owner of the global debt security, the depositary or its nominee, as
the case may be, will be considered the sole owner or holder of the debt
securities represented by the global debt security for all purposes under the
indenture. Except as provided below, owners of beneficial interests in a global
debt security will not be entitled to have any of the individual debt
securities of the series represented by the global debt security registered in
their names, will not receive or be entitled to receive physical delivery of
any debt securities of the series in definitive form and will not be considered
the owners or holders of them under the indenture.
 
   Payments of principal of, and premium, if any, and interest on individual
debt securities represented by a global debt security registered in the name of
a depositary or its nominee will be made to the depositary or its nominee, as
the case may be, as the registered owner of the global debt security
representing the debt securities. None of Adelphia, or the trustee, any paying
agent, or the securities registrar for the debt securities will have any
responsibility or liability for any aspect of the records relating to or
payments made on account of beneficial ownership interest of the global debt
security for the debt securities or for maintaining, supervising or reviewing
any records relating to those beneficial ownership interests.
 
   Adelphia expects that the depositary for a series of debt securities or its
nominee, upon receipt of any payment of principal, premium or interest in
respect of a permanent global debt security representing any of the debt
securities, immediately will credit participants' accounts with payments in
amounts proportionate to their respective beneficial interest in the principal
amount of the global debt security for the debt securities as shown on the
records of the depositary or its nominee. Adelphia also expects that payments
by participants to owners of beneficial interests in the global debt security
held through the participants will be governed by standing instructions and
customary practices, as is now the case with securities held for the accounts
of customers in bearer form or registered in "street name." These payments will
be the responsibility of these participants.
 
                                       22
<PAGE>
 
   Unless otherwise specified in the applicable prospectus supplement, if the
depositary for a series of debt securities is at any time unwilling, unable or
ineligible to continue as depositary and a successor depositary is not
appointed by Adelphia within 90 days, Adelphia will issue individual debt
securities of the series in exchange for the global debt security representing
the series of debt securities. In addition, unless otherwise specified in the
applicable prospectus supplement, Adelphia may at any time and in its sole
discretion, subject to any limitations described in the prospectus supplement
relating to the debt securities, determine not to have any debt securities of
the series represented by one or more global debt securities and, in such
event, will issue individual debt securities of the series in exchange for such
global debt securities. Further, if Adelphia so specifies with respect to the
debt securities of a series, an owner of a beneficial interest in a global debt
security representing debt securities of the series may, on terms acceptable to
Adelphia, the trustee and the depositary for the global debt security, receive
individual debt securities of the series in exchange for such beneficial
interests, subject to any limitations described in the prospectus supplement
relating to the debt securities. In any such instance, an owner of a beneficial
interest in a global debt security will be entitled to physical delivery of
individual debt securities of the series represented by the global debt
security equal in principal amount to its beneficial interest and to have the
debt securities registered in its name. Individual debt securities of the
series so issued will be issued in denominations, unless otherwise specified by
Adelphia, of $1,000 and integral multiples thereof. The applicable prospectus
supplement may specify other circumstances under which individual debt
securities may be issued in exchange for the global debt security representing
any debt securities.
 
Payment and Paying Agents
 
   Unless otherwise indicated in the applicable prospectus supplement, payment
of principal of, and premium, if any, and any interest on debt securities will
be made at the office of the trustee in New York or at the office of such
paying agent or paying agents as Adelphia may designate from time to time in
the applicable prospectus supplement, except that at the option of Adelphia
payment of any interest may be made:
 
  .  except in the case of global debt securities, by check mailed to the
     address of the person or entity entitled thereto as such address shall
     appear in the securities register; or
 
  .  by transfer to an account maintained by the person or entity entitled
     thereto as specified in the securities register, provided that proper
     transfer instructions have been received by the regular record date.
     Unless otherwise indicated in the applicable prospectus supplement, we
     will make payment of any interest on debt securities to the person or
     entity in whose name the debt security is registered at the close of
     business on the regular record date for the interest payment, except in
     the case of defaulted interest. Adelphia may at any time designate
     additional paying agents or rescind the designation of any paying agent;
     however, Adelphia will at all times be required to maintain a paying
     agent in each place of payment for each series of debt securities.
 
                                       23
<PAGE>
 
   Any moneys deposited with the trustee or any paying agent, or held by
Adelphia in trust, for the payment of the principal of, and premium, if any, or
interest on any debt security and remaining unclaimed for two years after such
principal, and premium, if any, or interest has become due and payable will, at
the request of Adelphia, be repaid to Adelphia or released from such trust, as
applicable, and the holder of the debt security will thereafter look, as a
general unsecured creditor, only to Adelphia for payment.
 
Option to Defer Interest Payments or to Pay-in-Kind
 
   If provided in the applicable prospectus supplement, Adelphia will have the
right, at any time and from time to time during the term of any series of debt
securities, to defer the payment of interest for such number of consecutive
interest payment periods as may be specified in the applicable prospectus
supplement, subject to the terms, conditions and covenants, if any, specified
in such prospectus supplement, provided that an extension period may not extend
beyond the stated maturity of the final installment of principal of the series
of debt securities. If provided in the applicable prospectus supplement,
Adelphia will have the right, at any time and from time to time during the term
of any series of debt securities, to make payments of interest by delivering
additional debt securities of the same series. Certain material U.S. federal
income tax consequences and special considerations applicable to the debt
securities will be described in the applicable prospectus supplement.
 
Subordination
 
   Except as set forth in the applicable prospectus supplement, the
subordinated indenture provides that the subordinated debt securities are
subordinated and junior in right of payment to all senior indebtedness of
Adelphia. If:
 
  .  Adelphia defaults in the payment of any principal, or premium, if any,
     or interest on any senior indebtedness when the same becomes due and
     payable, whether at maturity or at a date fixed for prepayment or
     declaration or otherwise; or
 
  .  an event of default occurs with respect to any senior indebtedness
     permitting the holders thereof to accelerate the maturity thereof and
     written notice of such event of default, requesting that payments on
     subordinated debt securities cease, is given to Adelphia by the holders
     of senior indebtedness,
 
   then unless and until the default in payment or event of default shall have
been cured or waived or shall have ceased to exist, no direct or indirect
payment, in cash, property or securities, by set-off or otherwise, will be made
or agreed to be made on account of the subordinated debt securities or interest
thereon or in respect of any repayment, redemption, retirement, purchase or
other acquisition of subordinated debt securities.
 
   Except as set forth in the applicable prospectus supplement, the
subordinated indenture provides that in the event of:
 
  .  any insolvency, bankruptcy, receivership, liquidation, reorganization,
     readjustment, composition or other similar proceeding relating to
     Adelphia, its creditors or its property;
 
                                       24
<PAGE>
 
  .  any proceeding for the liquidation, dissolution or other winding-up of
     Adelphia, voluntary or involuntary, whether or not involving insolvency
     or bankruptcy proceedings;
 
  .  any assignment by Adelphia for the benefit of creditors; or
 
  .  any other marshaling of the assets of Adelphia;
 
all present and future senior indebtedness, including, without limitation,
interest accruing after the commencement of the proceeding, assignment or
marshaling of assets, will first be paid in full before any payment or
distribution, whether in cash, securities or other property, will be made by
Adelphia on account of subordinated debt securities. In that event, any
payment or distribution, whether in cash, securities or other property, other
than securities of Adelphia or any other corporation provided for by a plan of
reorganization or a readjustment, the payment of which is subordinate, at
least to the extent provided in the subordination provisions of the indenture,
to the payment of all senior indebtedness at the time outstanding and to any
securities issued in respect thereof under any such plan of reorganization or
readjustment and other than payments made from any trust described in the
"Satisfaction and Discharge; Defeasance" below, which would otherwise but for
the subordination provisions be payable or deliverable in respect of
subordinated debt securities, including any such payment or distribution which
may be payable or deliverable by reason of the payment of any other
indebtedness of Adelphia being subordinated to the payment of subordinated
debt securities will be paid or delivered directly to the holders of senior
indebtedness, or to their representative or trustee, in accordance with the
priorities then existing among such holders until all senior indebtedness
shall have been paid in full. No present or future holder of any senior
indebtedness will be prejudiced in the right to enforce subordination of the
indebtedness evidenced by subordinated debt securities by any act or failure
to act on the part of Adelphia.
 
   The term "senior indebtedness" is defined as the principal, premium, if
any, and interest on:
 
  .  all indebtedness of Adelphia, whether outstanding on the date of the
     issuance of subordinated debt securities or thereafter created, incurred
     or assumed, which is for money borrowed, or which is evidenced by a note
     or similar instrument given in connection with the acquisition of any
     business, properties or assets, including securities;
 
  .  any indebtedness of others of the kinds described in the first bullet
     point above for the payment of which Adelphia is responsible or liable
     as guarantor or otherwise; and
 
  .  amendments, renewals, extensions and refundings of any such
     indebtedness;
 
unless in any instrument or instruments evidencing or securing such
indebtedness or pursuant to which the same is outstanding, or in any such
amendment, renewal, extension or refunding, it is expressly provided that such
indebtedness is not superior in right of payment to subordinated debt
securities. The senior indebtedness will continue to be senior
 
                                      25
<PAGE>
 
indebtedness and entitled to the benefits of the subordination provisions
irrespective of any amendment, modification or waiver of any term of the senior
indebtedness or extension or renewal of the senior indebtedness.
 
   Except as provided in the applicable prospectus supplement, the subordinated
indenture for a series of subordinated debt does not limit the aggregate amount
of senior indebtedness that may be issued by Adelphia. As of December 31, 1998,
senior indebtedness of the Adelphia Parent Company aggregated approximately
$1,810,212,000. In addition, because Adelphia is a holding company, the
subordinated debt securities are effectively subordinated to all existing and
future liabilities of Adelphia's subsidiaries.
 
Modification of Indentures
 
   From time to time, Adelphia and the trustees may modify the indentures
without the consent of any holders of any series of debt securities with
respect to some matters, including:
 
  .  to cure any ambiguity, defect or inconsistency or to correct or
     supplement any provision which may be inconsistent with any other
     provision of the indenture;
 
  .  to qualify, or maintain the qualification of, the indentures under the
     Trust Indenture Act; and
 
  .  to make any change that does not materially adversely affect the
     interests of any holder of such series of debt securities.
 
   In addition, under the indentures, Adelphia and the trustee may modify some
rights, covenants and obligations of Adelphia and the rights of holders of any
series of debt securities with the written consent of the holders of at least a
majority in aggregate principal amount of the series of outstanding debt
securities; but no extension of the maturity of any series of debt securities,
reduction in the interest rate or extension of the time for payment of
interest, change in the optional redemption or repurchase provisions in a
manner adverse to any holder of the series of debt securities, other
modification in the terms of payment of the principal of, or interest on, the
series of debt securities, or reduction of the percentage required for
modification, will be effective against any holder of the series of outstanding
debt securities without the holder's consent.
 
   In addition, Adelphia and the trustees may execute, without the consent of
any holder of the debt securities, any supplemental indenture for the purpose
of creating any new series of debt securities.
 
Events of Default
 
   The indentures provide that any one or more of the following described
events with respect to a series of debt securities that has occurred and is
continuing constitutes an "event of default" with respect to that series of
debt securities:
 
                                       26
<PAGE>
 
  .  failure for 60 days to pay any interest or any sinking fund payment on
     the series of debt securities when due, (subject to the deferral of any
     due date in the case of an extension period);
 
  .  failure to pay any principal or premium, if any, on the series of the
     debt securities when due whether at maturity, upon redemption, by
     declaration or otherwise;
 
  .  failure to observe or perform in any material respect certain other
     covenants contained in the indenture for 90 days after written notice
     has been given to Adelphia from the trustee or the holders of at least
     25% in principal amount of the series of outstanding debt securities;
 
  .  default resulting in acceleration of other indebtedness of Adelphia for
     borrowed money where the aggregate principal amount so accelerated
     exceeds $25 million and the acceleration is not rescinded or annulled
     within 30 days after the written notice thereof to Adelphia by the
     trustee or to Adelphia and the trustee by the holders of 25% in
     aggregate principal amount of the debt securities of the series then
     outstanding, provided that the event of default will be remedied, cured
     or waived if the default that resulted in the acceleration of such other
     indebtedness is remedied, cured or waived; or
 
  .  certain events in bankruptcy, insolvency or reorganization of Adelphia.
 
   The holders of a majority in outstanding principal amount of the series of
debt securities have the right to direct the time, method and place of
conducting any proceeding for any remedy available to the trustee of the
series. The trustee or the holders of not less than 25% in aggregate
outstanding principal amount of the series may declare the principal due and
payable immediately upon an event of default. The holders of a majority in
aggregate outstanding principal amount of the series may annul the declaration
and waive the default if the default (other than the non-payment of the
principal of the series which has become due solely by the acceleration) has
been cured and a sum sufficient to pay all matured installments of interest and
principal due otherwise than by acceleration has been deposited with the
trustee of the series.
 
   The holders of a majority in outstanding principal amount of a series of
debt securities affected thereby may, on behalf of the holders of all the
holders of the series of debt securities, waive any past default, except a
default in the payment of principal or interest, unless the default has been
cured and a sum sufficient to pay all matured installments of interest and
principal due otherwise than by acceleration has been deposited with the
trustee of the series, or a default in respect of a covenant or provision which
under the related indenture cannot be modified or amended without the consent
of the holder of each outstanding debt security of the series. Adelphia is
required to file annually with the trustees a certificate as to whether or not
Adelphia is in compliance with all the conditions and covenants applicable to
it under the indentures.
 
   In case an event of default shall occur and be continuing as to a series of
debt securities, the trustee of the series will have the right to declare the
principal of and the interest on the
 
                                       27
<PAGE>
 
debt securities, and any other amounts payable under the indenture, to be
forthwith due and payable and to enforce its other rights as a creditor with
respect to the debt securities.
 
   No holder of any debt securities will have any right to institute any
proceeding with respect to the indenture or for any remedy thereunder, unless
the holder shall have previously given to the trustee written notice of a
continuing event of default and unless also the holders of at least 25% in
aggregate principal amount of the outstanding debt securities of the series
shall have made written request and offered reasonably indemnity to the trustee
of the series to institute the proceeding as a trustee, and unless the trustee
shall not have received from the holders of a majority in aggregate principal
amount of the outstanding debt securities of the class a direction inconsistent
with the request and shall have failed to institute the proceeding within 60
days. However, these limitations do not apply to a suit instituted by a holder
of a debt security for enforcement of payment of the principal or interest on
the debt security on or after the respective due dates expressed in the debt
security.
 
Consolidation, Merger, Sale of Assets and Other Transactions
 
   Unless otherwise indicated in the applicable prospectus supplement, the
indentures provide that Adelphia will not consolidate with or merge into any
other person or entity or sell, assign, convey, transfer or lease its
properties and assets substantially as an entirety to any person or entity
unless:
 
  .  either Adelphia is the continuing corporation, or any successor or
     purchaser is a corporation, partnership, or trust or other entity
     organized under the laws of the United States of America, any State
     thereof or the District of Columbia, and the successor or purchaser
     expressly assumes Adelphia's obligations on the debt securities under a
     supplemental indenture; and
 
  .  immediately before and after giving effect thereto, no event of default,
     and no event which, after notice or lapse of time or both, would become
     an event of default, shall have happened and be continuing.
 
   Unless otherwise indicated in the applicable prospectus supplement, the
general provisions of the indentures do not afford holders of the debt
securities protection in the event of a highly leveraged or other transaction
involving Adelphia that may adversely affect holders of the debt securities.
 
Satisfaction and Discharge; Defeasance
 
   The indentures provide that when, among other things, all debt securities
not previously delivered to the trustee for cancellation:
 
  .  have become due and payable, or
 
  .  will become due and payable at their stated maturity within one year,
 
                                       28
<PAGE>
 
and Adelphia deposits or causes to be deposited with the trustee, as trust
funds in trust for the purpose, an amount in the currency or currencies in
which the debt securities are payable sufficient to pay and discharge the
entire indebtedness on the debt securities not previously delivered to the
trustee for cancellation, for the principal, and premium, if any, and interest
to the date of the deposit or to the stated maturity, as the case may be, then
the indenture will cease to be of further effect (except as to Adelphia's
obligations to pay all other sums due pursuant to the indenture and to provide
the officers' certificates and opinions of counsel described therein), and
Adelphia will be deemed to have satisfied and discharged the indenture.
 
   The indentures provide that Adelphia may elect either:
 
  .  to terminate, and be deemed to have satisfied, all its obligations with
     respect to any series of debt securities, except for the obligations to
     register the transfer or exchange of such debt securities, to replace
     mutilated, destroyed, lost or stolen debt securities, to maintain an
     office or agency in respect of the debt securities and to compensate and
     indemnify the trustee ("defeasance"); or
 
  .  to be released from its obligations with respect to certain covenants,
     ("covenant defeasance") upon the deposit with the trustee, in trust for
     such purpose, of money and/or U.S. Government Obligations, as defined in
     the indenture, which through the payment of principal and interest in
     accordance with the term used will provide money, in an amount
     sufficient (in the opinion of a nationally recognized firm of
     independent public accountants) to pay the principal of, interest on and
     any other amounts payable in respect of the outstanding debt securities
     of the series.
 
   Such a trust may be established only if, among other things, Adelphia has
delivered to the trustee an opinion of counsel (as specified in the indenture)
with regard to certain matters, including an opinion to the effect that the
holders of the debt securities will not recognize income, gain or loss for
Federal income tax purposes as a result of the deposit and discharge and will
be subject to Federal income tax on the same amounts and in the same manner and
at the same times as would have been the case if the deposit and defeasance or
covenant defeasance, as the case may be, had not occurred.
 
Redemption
 
   Unless otherwise indicated in the applicable prospectus supplement, debt
securities will not be subject to any sinking fund requirements.
 
   Unless otherwise indicated in the applicable prospectus supplement, Adelphia
may, at its option, redeem the debt securities of any series in whole at any
time or in part from time to time, at the redemption price set forth in the
applicable prospectus supplement plus accrued and unpaid interest to the date
fixed for redemption, and debt securities in denominations larger than $1,000
may be redeemed in part but only in integral multiples of $1,000. If the debt
securities of any series are so redeemable only on or after a specified date or
upon the satisfaction of additional conditions, the applicable prospectus
supplement will specify the date or describe the conditions.
 
                                       29
<PAGE>
 
   Adelphia will mail notice of any redemption at least 30 days but not more
than 60 days before the redemption date to each holder of debt securities to be
redeemed at the holder's registered address. Unless Adelphia defaults in the
payment of the redemption price, on and after the redemption date interest
shall cease to accrue on the debt securities or portions thereof called for
redemption.
 
Conversion or Exchange
 
   If and to the extent indicated in the applicable prospectus supplement, the
debt securities of any series may be convertible or exchangeable into other
securities. The specific terms on which debt securities of any series may be so
converted or exchanged will be set forth in the applicable prospectus
supplement. These terms may include provisions for conversion or exchange,
either mandatory, at the option of the holder, or at the option of Adelphia, in
which case the number of shares of other securities to be received by the
holders of debt securities would be calculated as of a time and in the manner
stated in the applicable prospectus supplement.
 
Certain Covenants
 
   The indentures contain certain covenants regarding, among other matters,
corporate existence, payment of taxes and reports to holders of debt
securities. If and to the extent indicated in the applicable prospectus
supplement, these covenants may be removed or additional covenants added with
respect to any series of debt securities.
 
Governing Law
 
   The indentures and the debt securities will be governed by and construed in
accordance with the laws of the State of New York.
 
Information Concerning the Trustees
 
   Each trustee shall have and be subject to all the duties and
responsibilities specified with respect to an indenture trustee under the Trust
Indenture Act. Subject to these provisions, each trustee is under no obligation
to exercise any of the powers vested in it by the indenture at the request of
any holder of the debt securities, unless offered reasonable indemnity by the
holder against the costs, expenses and liabilities which might be incurred
thereby. Each trustee is not required to expend or risk its own funds or
otherwise incur personal financial liability in the performance of its duties
if the trustee reasonably believes that repayment or adequate indemnity is not
reasonably assured to it.
 
                                       30
<PAGE>
 
                          DESCRIPTION OF CAPITAL STOCK
 
   The following description of the capital stock of Adelphia and certain
provisions of Adelphia's Certificate of Incorporation and Bylaws as of April
18, 1999 is a summary and is qualified in its entirety by Adelphia's
Certificate of Incorporation and Bylaws, which documents are exhibits to the
registration statement covering this prospectus.
 
   Adelphia's authorized capital stock consists of 200,000,000 shares of Class
A common stock, 25,000,000 shares of Class B common stock, and 5,000,000 shares
of preferred stock.
 
Common Stock
 
   Dividends. Holders of Class A common stock and Class B common stock are
entitled to receive such dividends as may be declared by Adelphia's Board of
Directors out of funds legally available for this purpose, but only after
payment of dividends required to be paid on outstanding shares of any other
class or series of stock having preference over common stock as to dividends.
No dividend may be declared or paid in cash or property on either class of
common stock, however, unless simultaneously a dividend is paid on the other
class of common stock as follows. In the event a cash dividend is paid, the
holders of Class A common stock will be paid a cash dividend per share equal to
105% of the amount payable per share of Class B common stock. In the event of a
property dividend, holders of each class of common stock are entitled to
receive the same value per share of common stock outstanding. In the case of
any stock dividend, holders of Class A common stock are entitled to receive the
same percentage dividend (payable in Class A common stock) as the holders of
Class B common stock receive (payable in Class B common stock).
 
   Voting Rights. Holders of Class A common stock and Class B common stock vote
as a single class on all matters submitted to a vote of the stockholders, with
each share of Class A common stock entitled to one vote and each share of Class
B common stock entitled to ten votes, except:
 
  .  for the election of directors, and
 
  .  as otherwise provided by law.
 
   In the annual election of directors, the holders of Class A common stock,
voting as a separate class, are entitled to elect one of Adelphia's directors.
The holders of Class A common stock and Class B common stock, voting as a
single class with each share of Class A common stock entitled to one vote and
each share of Class B common stock entitled to ten votes, are entitled to elect
the remaining directors. Consequently, holders of Class B common stock have
sufficient voting power to elect the remaining seven members of the current
eight-member board of directors. Holders of Class A common stock and Class B
common stock are not entitled to cumulate votes in the election of directors.
Under Delaware law and Adelphia's Certificate of Incorporation, the affirmative
vote of a majority of the outstanding shares of Class A common stock is
required to approve, among other matters, a change in the powers, preferences
or special rights of the shares of Class A common stock
 
                                       31
<PAGE>
 
so as to affect them adversely, but is not required to approve an increase or
decrease in the number of authorized shares of Class A common stock.
 
   Liquidation Rights. Upon liquidation, dissolution or winding up of Adelphia,
any distributions to holders of any class of common stock would only be made
after payment in full of creditors and provision for the preference of any
other class or series of stock having a preference over the common stock upon
liquidation, dissolution or winding up that may then be outstanding.
Thereafter, the holders of Class A common stock are entitled to a preference of
$1.00 per share. After this amount is paid, holders of the Class B common stock
are entitled to receive $1.00 per share. Any remaining amount would then be
shared ratably by both classes.
 
   Other Provisions. Each share of Class B common stock is convertible at the
option of its holder into one share of Class A common stock at any time. The
holders of Class A common stock and Class B common stock are not entitled to
preemptive or subscription rights. Neither the Class A common stock nor the
Class B common stock may be subdivided, consolidated, reclassified or otherwise
changed unless concurrently the other class of common stock is subdivided,
consolidated, reclassified or otherwise changed in the same proportion and in
the same manner.
 
Preferred Stock
 
   The 5,000,000 shares of authorized preferred stock may be issued with such
designations, powers, preferences and other rights and qualifications,
limitations and restrictions thereof as Adelphia's board of directors may
authorize without further action by Adelphia's stockholders, including but not
limited to:
 
  .  the distinctive designation of each series and the number of shares that
     will constitute the series;
 
  .  the voting rights, if any, of shares of the series;
 
  .  the dividend rate on the shares of the series, any restriction,
     limitation or condition upon the payment of dividends, whether dividends
     will be cumulative and the dates on which dividends are payable;
 
  .  the prices at which, and the terms and conditions on which, the shares
     of the series may be redeemed, if the shares are redeemable;
 
  .  the purchase or sinking fund provisions, if any, for the purchase or
     redemption of shares of the series;
 
  .  any preferential amount payable upon shares of the series in the event
     of the liquidation, dissolution or winding up of Adelphia or the
     distribution of its assets;
 
  .  the prices or rates of conversion at which, and the terms and conditions
     on which, the shares of such series may be converted into other
     securities, if such shares are
 
                                       32
<PAGE>
 
     convertible. Adelphia has designated and has outstanding three classes
     of preferred stock--8 1/8% Series C Convertible preferred stock, 13%
     Cumulative Exchangeable preferred stock and 5 1/2% Series D Convertible
     preferred stock. For ease of reference, we refer to the 8 1/8% Series C
     convertible preferred stock as the 8 1/8% Convertible preferred stock,
     to the 13% Series B Cumulative Exchangeable preferred stock as the
     Exchangeable preferred stock and to the 5 1/2% Series D Convertible
     preferred stock as the 5 1/2% Convertible preferred stock; and
 
  .  In connection with the foregoing designations, the maximum number of
     shares authorized of 8 1/8% Convertible preferred stock, Exchangeable
     preferred stock and 5 1/2% Convertible preferred stock is 100,000
     shares, 1,500,000 shares and 2,875,000 shares, respectively. The 8 1/8%
     Convertible preferred stock, Exchangeable preferred stock and 5 1/2%
     Convertible preferred stock rank senior to the common stock of Adelphia
     with respect to dividends and liquidation. The 8 1/8% Convertible
     preferred stock, Exchangeable preferred stock and 5 1/2% Convertible
     preferred stock rank equal in right of payment as to dividends and upon
     liquidation, dissolution or winding-up of Adelphia, except that no cash
     dividends nor any distributions may be declared or paid on, nor any
     redemptions made with respect to the Exchangeable preferred stock or the
     5 1/2% Convertible preferred stock unless full cumulative dividends have
     been paid on all outstanding shares of 8 1/8% Convertible preferred
     stock for all prior dividend periods.
 
   8 1/8% Convertible Preferred Stock. The 8 1/8% Convertible preferred stock
accrues cumulative dividends at the rate of 8 1/8% per annum, or $81.25 per
share of the 8 1/8% Convertible preferred stock per annum. The 8 1/8%
Convertible preferred stock has a liquidation preference of $1,000 per share.
Upon any voluntary or involuntary liquidation, dissolution or winding-up of
the affairs of Adelphia, the holders of the 8 1/8% Convertible preferred stock
are entitled to receive the liquidation preference for the 8 1/8% Convertible
preferred stock, plus any accrued but unpaid dividends thereon, and no more.
Neither the voluntary sale, conveyance, exchange or transfer, for cash, shares
of stock, securities or other consideration, of all or substantially all of
the property or assets of Adelphia nor the consolidation or merger of Adelphia
with or into one or more corporations will be deemed to be a voluntary or
involuntary liquidation, dissolution or winding-up of Adelphia, unless the
sale, conveyance, exchange or transfer shall be in connection with a
liquidation, dissolution or winding-up of the business of Adelphia.
 
   Each share of 8 1/8% Convertible preferred stock is convertible based upon
its stated liquidation preference into shares of Class A common stock of
Adelphia at any time at the election of the holder of it at a conversion price
of $8.48 per share of Adelphia Class A common stock, or approximately 117.9245
shares of Class A common stock per share of 8 1/8% Convertible preferred
stock. The conversion price is subject to adjustment if Adelphia pays a
dividend in shares of Class A common stock or subdivides, combines or
reclassifies the shares of Class A common stock or distributes rights to
purchase common stock or makes certain other distributions to holders of
common stock. The 8 1/8% Convertible preferred stock is not entitled to vote
in the election of directors of Adelphia or upon any
 
                                      33
<PAGE>
 
other matter, except as provided by law, unless a Voting Rights Triggering
Event, as defined in the related Certificate of Designation, occurs with
respect to the 8 1/8% Convertible preferred stock. If this occurs, the board of
directors will be expanded by two seats, the directors for which shall then be
elected by the holders of the 8 1/8% Convertible preferred stock. The 8 1/8%
Convertible preferred stock is not subject to mandatory redemption.
 
   The 8 1/8% Convertible preferred stock may be redeemed at the option of
Adelphia, in whole or in part, at any time on or after August 1, 2000 at 104%,
102% and 100% of the liquidation preference of the 8 1/8% Convertible preferred
stock plus accrued dividends in the years beginning August 1, 2000, 2001 and
2002 and thereafter, respectively.
 
   Exchangeable Preferred Stock. The shares of Exchangeable preferred stock are
redeemable at the option of Adelphia, on or after July 15, 2002. Adelphia is
required, subject to certain conditions, to redeem all of the Exchangeable
preferred stock outstanding on July 15, 2009, at a redemption price equal to
100% of the liquidation preference thereof, plus accumulated and unpaid
dividends to the date of redemption. Dividends on the Exchangeable preferred
stock accrue at a rate of 13% of the liquidation preference per annum and are
payable semiannually. The Exchangeable preferred stock is not entitled to vote
in the election of directors of Adelphia or upon any other matter, except as
provided by law, unless a Voting Rights Triggering Event, as defined in the
related Certificate of Designation, occurs with respect to the Exchangeable
preferred stock. If this occurs, the board of directors will be expanded by two
seats, the directors for which shall then be elected by the holders of the
Exchangeable preferred stock.
 
   5 1/2% Convertible Preferred Stock. The 5 1/2% Convertible preferred stock
accrues cumulative dividends at the rate of 5 1/2% per annum, or $11.00 per
share of the 5 1/2% Convertible preferred stock per annum. The 5 1/2%
Convertible preferred stock has a liquidation preference of $200 per share.
Upon any voluntary or involuntary liquidation, dissolution or winding-up of the
affairs of Adelphia, the holders of the 5 1/2% Convertible preferred stock are
entitled to receive the liquidation preference for the 5 1/2% Convertible
preferred stock, plus any accrued but unpaid dividends thereon, and no more.
Neither the voluntary sale, conveyance, exchange or transfer, for cash, shares
of stock, securities or other consideration, of all or substantially all of the
property or assets of Adelphia nor the consolidation or merger of Adelphia with
or into one or more corporations will be deemed to be a voluntary or
involuntary liquidation, dissolution or winding-up of Adelphia, unless the
sale, conveyance, exchange or transfer shall be in connection with a
liquidation, dissolution or winding-up of the business of Adelphia.
 
   Each share of 5 1/2% Convertible preferred stock is convertible based upon
its stated liquidation preference into shares of Class A common stock of
Adelphia at any time at the election of the holder of it at a conversion price
of $81.45 per share of Adelphia Class A common stock, or approximately 2.45549
shares of Class A common stock per share of 5 1/2% Convertible preferred stock.
The conversion price is subject to adjustment in certain circumstances, such as
if Adelphia pays a dividend in shares of Class A common stock or subdivides,
combines or reclassifies the shares of Class A common stock or distributes
rights to purchase common stock or makes certain other distributions to holders
of Class A
 
                                       34
<PAGE>
 
common stock. The 5 1/2% Convertible preferred stock is not entitled to vote in
the election of directors of Adelphia or upon any other matter, except as
provided by law, unless dividends are in arrears in an amount equal to at least
six quarters. If this occurs, the board of directors will be expanded by two
seats, the directors for which shall then be elected by the holders of the 5
1/2% Convertible preferred stock and serve until the arrearage is eliminated.
The 5 1/2% Convertible preferred stock is not subject to mandatory redemption.
 
   The 5 1/2% Convertible preferred stock may be redeemed at the option of
Adelphia, in whole or in part, at any time on or after May 1, 2002, at the
option of Adelphia in shares of Class A common stock at a redemption price of
$206 per share plus accrued and unpaid dividends, if any, to the redemption
date, or for cash at a redemption price of $200 per share plus accrued and
unpaid dividends.
 
   The rights of holders of shares of common stock as described above will be
subject to, and may be adversely affected by, the rights of holders of any
additional classes of preferred stock that may be designated and issued in the
future.
 
   We will describe the particular terms and conditions of a series of
preferred stock offered by a prospectus supplement in the prospectus supplement
relating to such series of preferred stock. The applicable prospectus
supplement or prospectus supplements will describe the following terms of each
series of preferred stock being offered:
 
  .  its title;
 
  .  the number of shares offered, any liquidation preference per share and
     the purchase price;
 
  .  any applicable dividend rate(s), period(s) and/or payment date(s) or
     method(s) of calculation;
 
  .  if dividends apply whether they shall be cumulative or non-cumulative
     and, if cumulative, the date from which dividends shall accumulate;
 
  .  any procedures for any auction and remarketing;
 
  .  any provisions for a sinking fund;
 
  .  any provisions for redemption;
 
  .  any listing of such preferred stock on any securities exchange or
     market;
 
  .  the terms and conditions, if applicable, upon which it will be
     convertible into common stock or another series of preferred stock of
     Adelphia, including the conversion price (or manner of calculation
     thereof) and conversion period;
 
  .  the terms and conditions, if applicable, upon which it will be
     exchangeable into debt securities of Adelphia, including the exchange
     price (or manner of calculation thereof) and exchange period;
 
  .  any voting rights;
 
                                       35
<PAGE>
 
  .  a discussion of any applicable material and/or special United States
     federal income tax considerations;
 
  .  whether interests in that series of preferred stock will be represented
     by depositary shares;
 
  .  its relative ranking and preferences as to any dividend rights and
     rights upon liquidation, dissolution or winding up of the affairs of
     Adelphia;
 
  .  any limitations on the future issuance of any class or series of
     preferred stock ranking senior to or on a parity with the series of
     preferred stock being offered as to dividend rights and rights upon
     liquidation, dissolution or winding up of the affairs of Adelphia; and
 
  .  any other specific terms, preferences, rights, limitations or
     restrictions.
 
TRANSFER AGENT
 
   The Transfer Agent and Registrar for the Class A common stock and the
Exchangeable preferred stock is American Stock Transfer & Trust Company. The
Transfer Agent and Registrar for the Class B common stock is Adelphia.
 
                              BOOK ENTRY ISSUANCE
 
   Unless otherwise specified in the applicable prospectus supplement, DTC will
act as depositary for securities issued in the form of global securities. Such
securities will be issued only as fully-registered securities registered in the
name of Cede & Co. (DTC's nominee). One or more fully-registered global
securities will be issued for such securities representing in the aggregate the
total number of such securities, and will be deposited with or on behalf of
DTC.
 
   DTC is a limited-purpose trust company organized under the New York Banking
Law, a "banking organization" within the meaning of the New York Banking Law, a
member of the Federal Reserve System, a "clearing corporation" within the
meaning of the New York Uniform Commercial Code, and a "clearing agency"
registered pursuant to the provisions of Section 17A of the Exchange Act. DTC
holds securities that its participants deposit with DTC. DTC also facilitates
the settlement among its participants of securities transactions, such as
transfers and pledges, in deposited securities through electronic computerized
book-entry changes in participants' accounts, thereby eliminating the need for
physical movement of securities certificates. Direct participants include
securities brokers and dealers, banks, trust companies, clearing corporations
and certain other organizations. DTC is owned by a number of its direct
participants and by the New York Stock Exchange, the American Stock Exchange
and the National Association of Securities Dealers, Inc. Access to the DTC
system is also available to others, known as indirect participants, such as
securities brokers and dealers, banks and trust companies that clear through or
maintain custodial relationships with direct participants, either directly or
indirectly. The rules applicable to DTC and its participants are on file with
the Commission.
 
                                       36
<PAGE>
 
   Purchases of securities within the DTC system must be made by or through
direct participants, which will receive a credit for such Securities on DTC's
records. The ownership interest of each actual purchaser of each Security,
commonly referred to as the beneficial owner is in turn to be recorded on the
direct and indirect participants' records. Beneficial owners will not receive
written confirmation from DTC of their purchases, but beneficial owners are
expected to receive written confirmations providing details of the
transactions, as well as periodic statements of their holdings, from the direct
or indirect participants through which the beneficial owners purchased
securities. Transfers of ownership interests in securities issued in the form
of global securities are to be accomplished by entries made on the books of
participants acting on behalf of beneficial owners. Beneficial owners will not
receive certificates representing their ownership interests in such securities,
except in the event that use of the book-entry system for such securities is
discontinued.
 
   DTC has no knowledge of the actual beneficial owners of the securities
issued in the form of global securities. DTC's records reflect only the
identity of the direct participants to whose accounts such securities are
credited, which may or may not be the beneficial owners. The participants will
remain responsible for keeping account of their holdings on behalf of their
customers.
 
   Conveyance of notices and other communications by DTC to direct
participants, by direct participants to indirect participants, and by direct
participants and indirect participants to beneficial owners will be governed by
arrangements among them, subject to any statutory or regulatory requirements as
may be in effect from time to time.
 
   Although voting with respect to securities issued in the form of global
securities is limited to the holders of record of such securities, in those
instances in which a vote is required, neither DTC nor Cede & Co. will itself
consent or vote with respect to such securities. Under its usual procedures,
DTC would mail an omnibus proxy to the issuer of such securities as soon as
possible after the record date. The omnibus proxy assigns Cede & Co.'s
consenting or voting rights to those direct participants to whose accounts such
securities are credited on the record date, identified in a listing attached to
the omnibus proxy.
 
   Payments in respect of securities issued in the form of global securities
will be made by the issuer of such securities to DTC. DTC's practice is to
credit direct participants' accounts on the relevant payment date in accordance
with their respective holdings shown on DTC's records unless DTC has reason to
believe that it will not receive payments on such payment date. Payments by
participants to beneficial owners will be governed by standing instructions and
customary practices and will be the responsibility of such participant and not
of DTC or Adelphia, subject to any statutory or regulatory requirements as may
be in effect from time to time. Payments to DTC are the responsibility of the
issuer of the applicable securities, disbursement of such payments to direct
participants is the responsibility of DTC, and disbursements of such payments
to the beneficial owners is the responsibility of direct and indirect
participants.
 
                                       37
<PAGE>
 
   DTC may discontinue providing its services as depositary with respect to any
securities at any time by giving reasonable notice to the issuer of such
securities. In the event that a successor depositary is not obtained,
individual security certificates representing such securities are required to
be printed and delivered. Adelphia, at its option, may decide to discontinue
use of the system of book-entry transfers through DTC or a successor
depositary.
 
   The information in this section concerning DTC and DTC's book-entry system
has been obtained from sources that Adelphia believe to be accurate, but
Adelphia assumes no responsibility for the accuracy thereof. Adelphia has no
responsibility for the performance by DTC or its Participants of their
respective obligations as described herein or under the rules and procedures
governing their respective operations.
 
                              PLAN OF DISTRIBUTION
 
   Any of the securities being offered under this prospectus may be sold in any
one or more of the following ways from time to time:
 
  .  through agents;
 
  .  to or through underwriters;
 
  .  through dealers; and
 
  .  directly by Adelphia to purchasers.
 
   The distribution of the securities may be effected from time to time in one
or more transactions at a fixed price or prices, which may be changed, at
market prices prevailing at the time of sale, at prices related to such
prevailing market prices or at negotiated prices. Securities may also be
offered or sold through depository receipts issued by a depository institution.
 
   Offers to purchase securities may be solicited by agents designated by
Adelphia from time to time. Any agent involved in the offer or sale of the
securities under this prospectus will be named, and any commissions payable by
Adelphia to these agents will be set forth, in a related prospectus supplement.
Unless otherwise indicated in a prospectus supplement, any agent will be acting
on a reasonable best efforts basis for the period of its appointment. Any agent
may be deemed to be an underwriter, as that term is defined in the Securities
Act, of the securities so offered and sold.
 
   If securities are sold by means of an underwritten offering, Adelphia will
execute an underwriting agreement with an underwriter or underwriters at the
time an agreement for such sale is reached, and the names of the specific
managing underwriter or underwriters, as well as any other underwriters, the
respective amounts underwritten and the terms of the transaction, including
commissions, discounts and any other compensation of the underwriters and
dealers, if any, will be set forth in a related prospectus supplement. That
prospectus supplement and this prospectus will be used by the underwriters to
make resales of the securities. If underwriters are used in the sale of any
securities in connection with this prospectus, those securities will be
acquired by the underwriters for their own account and
 
                                       38
<PAGE>
 
may be resold from time to time in one or more transactions, including
negotiated transactions, at fixed public offering prices or at varying prices
determined by the underwriters and Adelphia at the time of sale. Securities may
be offered to the public either through underwriting syndicates represented by
managing underwriters or directly by one or more underwriters. If any
underwriter or underwriters are used in the sale of securities, unless
otherwise indicated in a related prospectus supplement, the underwriting
agreement will provide that the obligations of the underwriters are subject to
some conditions precedent and that the underwriters with respect to a sale of
these securities will be obligated to purchase all such Securities if any are
purchased.
 
   Adelphia may grant to the underwriters options to purchase additional
securities, to cover over-allotments, if any, at the initial public offering
price, with additional underwriting commissions or discounts, as may be set
forth in a related prospectus supplement. If Adelphia grants any over-allotment
option, the terms of that over-allotment option will be set forth in the
prospectus supplement for these securities.
 
   If a dealer is utilized in the sale of the securities in respect of which
this prospectus is delivered, Adelphia will sell these securities to the dealer
as principal. The dealer may then resell such securities to the public at
varying prices to be determined by such dealer at the time of resale. Any such
dealer may be deemed to be an underwriter, as such term is defined in the
Securities Act, of the securities so offered and sold. The name of the dealer
and the terms of the transaction will be set forth in the prospectus supplement
relating to those offers and sales.
 
   Offers to purchase securities may be solicited directly by Adelphia and
those sales may be made by Adelphia directly to institutional investors or
others, who may be deemed to be underwriters within the meaning of the
Securities Act with respect to any resale of those securities. The terms of any
sales of this type will be described in the prospectus supplement.
 
   Securities may also be offered and sold, if so indicated in the related
prospectus supplement, in connection with a remarketing upon their purchase, in
accordance with a redemption or repayment in connection with their terms, or
otherwise, by one or more firms "remarketing firms," acting as principals for
their own accounts or as agents for Adelphia. Any remarketing firm will be
identified and the terms of its agreement, if any, with Adelphia and its
compensation will be described in a related prospectus supplement. Remarketing
firms may be deemed to be underwriters, as that term is defined in the
Securities Act, in connection with the securities remarketed by them.
 
   If so indicated in a related prospectus supplement, Adelphia may authorize
agents and underwriters to solicit offers by certain institutions to purchase
securities from Adelphia at the public offering price set forth in a related
prospectus supplement as part of delayed delivery contracts providing for
payment and delivery on the date or dates stated in a related prospectus
supplement. Such delayed delivery contracts will be subject to only those
conditions set forth in a related prospectus supplement. A commission indicated
in a related prospectus supplement will be paid to underwriters and agents
soliciting purchases of securities pursuant to delayed delivery contracts
accepted by Adelphia.
 
                                       39
<PAGE>
 
   Agents, underwriters, dealers and remarketing firms may be entitled under
relevant agreements with Adelphia to indemnification by Adelphia against some
liabilities, including liabilities under the Securities Act, or to contribution
with respect to payments which such agents, underwriters, dealers and
remarketing firms may be required to make in respect thereof.
 
   Each series of securities will be a new issue and, other than the Class A
common stock, which is quoted on the Nasdaq National Market, will have no
established trading market. Unless otherwise specified in a related prospectus
supplement, Adelphia will not be obligated to list any series of securities on
an exchange or otherwise. We cannot assure you that there will be any liquidity
in the trading market for any of the securities.
 
   Agents, underwriters, dealers and remarketing firms may be customers of,
engage in transactions with, or perform services for, Adelphia and its
subsidiaries in the ordinary course of business.
 
                      WHERE YOU CAN FIND MORE INFORMATION
 
   We file annual, quarterly and special reports, as well as proxy statements
and other information with the SEC. You may read and copy any document we file
with the SEC at the SEC's Public Reference Room at 450 Fifth Street, N.W.,
Washington, D.C. 20549 or at its Regional Offices in Chicago, Illinois or New
York, New York. You may obtain further information about the operation of the
Public Reference Room by calling the SEC at 1-800- SEC-0330. Our SEC filings
are also available to the public over the Internet at the SEC's web site at
http://www.sec.gov, which contains reports, proxy statements and other
information regarding registrants like us that file electronically with the
SEC.
 
   This prospectus is part of a registration statement on Form S-3 filed by us
with the SEC under the Securities Act. As permitted by SEC rules, this
prospectus does not contain all of the information included in the registration
statement and the accompanying exhibits filed with the SEC. You may refer to
the registration statement and its exhibits for more information.
 
   The SEC allows us to "incorporate by reference" into this prospectus the
information we file with the SEC. This means that we can disclose important
information to you by referring you to those documents. The information
incorporated by reference is considered to be part of this prospectus. If we
subsequently file updating or superseding information in a document that is
incorporated by reference into this prospectus, the subsequent information will
also become part of this prospectus and will supersede the earlier information.
 
   We are is incorporating by reference the following documents that we have
filed with the SEC:
 
  .  our Annual Report on Form 10-K for the year ended March 31, 1998, which
     incorporates, in Items 7 and 8 to such Form 10-K, portions of the Form
     10-K for the
 
                                       40
<PAGE>
 
     fiscal year ended December 31, 1997 of Olympus Communications, L.P. and
     Olympus Capital Corporation, as amended by Adelphia's Form 10-K/A dated
     July 27, 1998;
 
  .  our Quarterly Reports on Form 10-Q for the quarters ended June 30, 1998,
     September 30, 1998 and December 31, 1998;
 
  .  our Current Reports on Form 8-K for the events dated June 29, 1998, July
     2, 1998, August 3, 1998, August 18, 1998, September 10, 1998, November
     9, 1998, November 12, 1998, December 23, 1998, January 11, 1999,
     February 22, 1999, February 23, 1999, March 5, 1999, March 30, 1999,
     March 31, 1999, April 9, 1999, April 19, 1999, April 21, 1999, April 23,
     1999, and April 28, 1999.
 
  .  our definitive proxy statement dated September 11, 1998 with respect to
     the Annual Meeting of Stockholders held on October 6, 1998; and
 
  .  the description of our Class A common stock contained in our
     registration statement filed with the SEC under Section 12 of the
     Exchange Act and subsequent amendments and reports filed to update such
     description.
 
   We are also incorporating by reference into this prospectus all of our
future filings with the SEC under Sections 13(a), 13(c), 14 or 15(d) of the
Exchange Act until this offering has been completed.
 
   You may obtain a copy of any of our filings which are incorporated by
reference, at no cost, by writing to or telephoning us at the following
address:
 
                        Adelphia Communications Corporation
                               Main at Water Street
                          Coudersport, Pennsylvania 16915
                           Attention: Investor Relations
                             Telephone: (814) 274-9830
 
   You should rely only on the information provided in this prospectus or
incorporated by reference. We have not authorized anyone to provide you with
different information. You should not assume that the information in this
prospectus is accurate as of any date other than the date on the first page of
the prospectus. We are not making this offer of securities in any state or
country in which the offer or sale is not permitted.
 
                                 LEGAL MATTERS
 
   Buchanan Ingersoll Professional Corporation, Pittsburgh, Pennsylvania will
pass upon the validity of the securities. Any required information regarding
ownership of Adelphia's securities by lawyers of such firm will be contained in
the applicable prospectus supplement. If the securities are underwritten, the
applicable prospectus supplement will also set forth whether and to what
extent, if any, a law firm for the underwriters will pass upon the validity of
the securities.
 
                                       41
<PAGE>
 
                                    EXPERTS
 
   The consolidated financial statements of Adelphia and its subsidiaries as of
March 31, 1997 and 1998, and for each of the three years in the period ended
March 31, 1998, and the consolidated financial statements of Olympus and its
subsidiaries as of December 31, 1996 and 1997, and for each of the three years
in the period ended December 31, 1997, all incorporated in this prospectus by
reference from Adelphia's Annual Report on Form 10-K for the year ended March
31, 1998 have been audited by Deloitte & Touche LLP, independent auditors, as
stated in their reports, which are incorporated herein by reference, and have
been so incorporated in reliance upon the reports of such firm given upon their
authority as experts in accounting and auditing.
 
   The consolidated financial statements of FrontierVision Partners, L.P. and
subsidiaries as of December 31, 1998 and 1997, and for each of the years in the
three year period ended December 31, 1998, have been incorporated by reference
herein and in this registration statement from Adelphia's Current Report on
Form 8-K filed April 19, 1999, in reliance upon the report of KPMG LLP,
independent certified public accountants, incorporated by reference herein, and
upon the authority of said firm as experts in accounting and auditing.
 
   The consolidated financial statements of Harron Communications Corp. and
subsidiaries as of December 31, 1998 and 1997 and for each of the three years
in the period ended December 31, 1998 incorporated in this prospectus by
reference from Adelphia's Current Report on Form 8-K filed April 19, 1999 have
been audited by Deloitte & Touche LLP, independent auditors, as stated in their
report, which is incorporated herein by reference, and has been so incorporated
in reliance upon the report of such firm given upon their authority as experts
in accounting and auditing.
 
   The consolidated financial statements of Century Communications Corp. and
subsidiaries as of May 31, 1998 and 1997 and for each of the three years in the
period ended May 31, 1998 incorporated in this prospectus by reference from
Adelphia's Current Report on Form 8-K filed April 19, 1999 have been audited by
Deloitte & Touche LLP, independent auditors as stated in their report, which is
incorporated herein by reference, and has been so incorporated in reliance upon
the report of such firm given upon their authority as experts in accounting and
auditing.
 
                                       42
<PAGE>
 
 
                      Adelphia Communications Corporation
 
                                Debt Securities
 
                                Preferred Stock
 
                              Class A Common Stock
 
                              Class B Common Stock
 
                               ----------------
 
                                   PROSPECTUS
 
                               ----------------
 
   We have not authorized any dealer, salesperson or other person to give any
information or represent anything contained in this prospectus. You must not
rely on any unauthorized information. This prospectus does not offer to sell
nor does it solicit to buy any securities in any jurisdiction where it is
unlawful. The information in this prospectus is current as of May 7, 1999.
 
 
                               Dated May   , 1999
<PAGE>
 
                                    PART II
 
                     INFORMATION NOT REQUIRED IN PROSPECTUS
 
Item 14. Other Expenses of Issuance and Distribution
 
   The following is an estimate of the expenses which will be incurred by
Adelphia in connection with the issuance and distribution of the securities
being registered.*
 
<TABLE>
<CAPTION>
                                                                       Amount
                                                                       ------
      <S>                                                            <C>
      SEC filing fee................................................ $1,279,323
      Trustee fees..................................................     10,000
      Blue Sky fees and expenses....................................     20,000
      Legal fees and expenses.......................................    200,000
      Accounting fees and expenses..................................    150,000
      Printing and engraving expenses...............................    150,000
      Miscellaneous expenses........................................     50,000
                                                                     ----------
      Total......................................................... $1,859,323
                                                                     ==========
</TABLE>
- --------
*All amounts are estimated except for the SEC filing fee.
 
Item 15. Indemnification of Directors and Officers
 
   Section 145 of the Delaware General Corporation Law provides in general that
a corporation may indemnify its directors, officers, employees or agents
against expenditures (including judgments, fines, amounts paid in settlement
and attorneys' fees) made by them in connection with certain lawsuits to which
they may be made parties by reason of their being directors, officers,
employees or agents and shall so indemnify such persons against expenses
(including attorneys' fees) if they have been successful on the merits or
otherwise. The bylaws of Adelphia provide for indemnification of the officers
and directors of Adelphia to the full extent permissible under Delaware law.
 
   Adelphia's Certificate of Incorporation also provides, pursuant to Section
102(b)(7) of the Delaware General Corporation Law, that directors of Adelphia
shall not be personally liable to Adelphia or its stockholders for monetary
damages for breach of fiduciary duty as a director for acts or omissions after
July 1, 1986, provided that directors shall nonetheless be liable for breaches
of the duty of loyalty, bad faith, intentional misconduct, knowing violations
of law, unlawful distributions to stockholders, or transactions from which a
director derived an improper personal benefit.
 
Item 16. Exhibits and Financial Statement Schedules
 
   (a) The following is a complete list of Exhibits filed as part of this
Registration Statement, which are incorporated herein:
 
<TABLE>
<CAPTION>
   Exhibit
     No.                    Reference
   -------                  ---------
   <C>     <S>                                          <C>
     1.01  Forms of Underwriting Agreements             To be filed by Form 8-K.
                                                        (File No. 0-16014)
     4.01  The Certificate of Incorporation of          Incorporated herein by reference
           Adelphia Communications Corporation          is Exhibit 3.01 to Registrant's
                                                        Current Report on Form 8-K dated
                                                        July 24, 1997. (File No. 0-16014)
     4.02  Bylaws of Adelphia Communications            Incorporated herein by reference
           Corporation                                  is Exhibit 3.02 to Registrant's
                                                        Current Report on Form 8-K for the
                                                        event dated April 9, 1999. (File
                                                        No. 0-16014)
</TABLE>
 
 
                                      II-1
<PAGE>
 
<TABLE>
<CAPTION>
   Exhibit
     No.                    Reference
   -------                  ---------
   <C>     <S>                                           <C>
     4.03  Senior Debt Indenture dated as of April 28,   Incorporated herein by reference
           1999, between Adelphia Communications         is Exhibit 4.01 to Registrant's
           Corporation and Bank of Montreal Trust        Current Report on Form 8-K for
           Company, Trustee                              event dated April 28, 1999 (File
                                                         No. 0-16104)
     4.04  Form of Subordinated Debt Indenture between   Incorporated herein by reference
           Adelphia Communications Corporation           is Exhibit 4.03 to Registration
                                                         Statement No. 333-57849.
     4.05  Certificate of Designations for 5 1/2%        Incorporated herein by reference
           Series D Convertible Preferred Stock          is Exhibit 3.01 to Registrant's
                                                         Current Report on Form 8-K for the
                                                         event dated April 28, 1999. (File
                                                         No. 0-16104)
     5.01  Opinion of Buchanan Ingersoll Professional    Filed herewith.
           Corporation
    12.01  Computation of Ratio of Earnings to           Incorporated by reference is
           Combined Fixed Charges and Preferred Stock    Exhibit 12.01 to Registration
           Dividends                                     Statement No. 333-72005
    23.01  Consent of Buchanan Ingersoll Professional    Filed herewith.
           Corporation (included in Exhibit 5.01)
    23.02  Consent of Deloitte & Touche LLP with         Filed herewith.
           respect to financial statements of Adelphia
           and Olympus
    23.03  Consent of Deloitte & Touche LLP with         Filed herewith.
           respect to financial statements of Century
    23.04  Consent of Deloitte & Touche LLP with         Filed herewith.
           respect to financial statements of Harron
    23.05  Consent of KPMG LLP with respect to           Filed herewith.
           financial statements of FrontierVision
    24.01  Power of Attorney (included on the            Filed herewith.
           signature page of the Registration
           Statement)
    25.01  Statement of Eligibility of Trustee           To be filed by amendment.
</TABLE>
 
Item 17. Undertakings
 
   (a) Rule 415 Offering.
 
   The undersigned Registrant hereby undertakes:
 
     (1) To file, during any period in which offers or sales are being made,
  a post-effective amendment to this Registration Statement:
 
       (i) To include any prospectus required by Section 10(a)(3) of the
    Securities Act;
 
       (ii) To reflect in the prospectus any facts or events arising after
    the effective date of the Registration Statement (or the most recent
    post-effective amendment thereof) which, individually or in the
    aggregate, represent a fundamental change in the information set forth
    in the Registration Statement;
 
       (iii) To include any material information with respect to the plan
    of distribution not previously disclosed in the Registration Statement
    or any material change to such information in the Registration
    Statement;
 
 
                                      II-2
<PAGE>
 
     Provided, however, that paragraphs (1)(i) and (1)(ii) above do not apply
  if the Registration Statement is on Form S-3 or Form S-8, and the
  information required to be included in a post-effective amendment by those
  paragraphs is contained in periodic reports filed by the registrant
  pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of
  1934 that are incorporated by reference in the Registration Statement.
 
     (2) That, for the purpose of determining any liability under the
  Securities Act of 1933, each such post-effective amendment shall be deemed
  to be a new registration statement relating to the securities offered
  therein, and the offering of such securities at that time shall be deemed
  to be the initial bona fide offering thereof.
 
     (3) To remove from registration by means of a post-effective amendment
  any of the securities being registered which remain unsold at the
  termination of the offering.
 
   (b) Filings Incorporating Subsequent Exchange Act Documents by Reference.
 
   The undersigned Registrant hereby undertakes that, for purposes of
determining any liability under the Securities Act of 1933, each filing of the
Registrant's annual report pursuant to Section 13(a) or Section 15(d) of the
Securities Exchange Act of 1934 (and, where applicable, each filing of an
employee benefit plan's annual report pursuant to Section 15(d) of the
Securities Exchange Act of 1934) that is incorporated by reference in the
Registration Statement shall be deemed to be a new registration statement
relating to the securities offered therein, and the offering of such securities
at that time shall be deemed to be the initial bona fide offering thereof.
 
   (c) Request for Acceleration of Effective Date.
 
   Insofar as indemnification for liabilities arising under the Securities Act
of 1933 may be permitted to directors, officers and controlling persons of the
registrant pursuant to the foregoing provisions, or otherwise, the registrant
has been informed that in the opinion of the Securities and Exchange Commission
such indemnification is against public policy as expressed in the Act and is,
therefore, unenforceable. In the event that a claim for indemnification against
such liabilities (other than the payment by the registrant of expenses incurred
or paid by a director, officer or controlling person of the registrant of
expenses incurred or paid by a director, officer or controlling person of the
registrant in the successful defense of any action, suit or proceeding) is
asserted by such director, officer or controlling person in connection with the
securities being registered, the registrant will, unless in the opinion of its
counsel the matter has been settled by controlling precedent, submit to a court
of appropriate jurisdiction the question of whether such indemnification by it
is against public policy as expressed in the Act and will be governed by the
final adjudication of such issue.
 
   (d) Trust Indenture Application.
 
   The undersigned Registrants hereby undertake to file an application for the
purpose of determining the eligibility of the trustee to act under subsection
(a) of Section 310 of the Trust Indenture Act ("Act") in accordance with the
rules and regulations prescribed by the Commission under Section 305(b)(2) of
the Act.
 
                                      II-3
<PAGE>
 
                                   SIGNATURES
 
   Pursuant to the requirements of the Securities Act of 1933, the Registrant
certifies that it has reasonable grounds to believe that it meets all of the
requirements for filing this Registration Statement on Form S-3 and has duly
caused this Registration Statement to be signed on its behalf by the
undersigned, thereunto duly authorized, in the City of Coudersport,
Commonwealth of Pennsylvania, on the 6th day of May, 1999.
 
                                          ADELPHIA COMMUNICATIONS CORPORATION
 
                                                    /s/ Timothy J. Rigas
                                          By: _________________________________
                                              Timothy J. Rigas, Executive Vice
                                                         President
 
   Known All Men By These Presents that each person whose signature appears
below constitutes and appoints John J. Rigas, Timothy J. Rigas and Daniel R.
Milliard, and each of them, such person's true and lawful attorneys-in-fact and
agents, with full power of substitution and revocation, for such person and in
such person's name, place and stead, in any and all amendments (including post-
effective amendments to this Registration Statement) and to file the same with
all exhibits thereto, and other documents in connection therewith, with the
Securities and Exchange Commission, granting unto said attorneys-in-fact and
agents, and each of them, full power and authority to do and perform each and
every act and thing requisite and necessary to be done, as fully to all intents
and purposes as such person might or could do in person, hereby ratifying and
confirming all that said attorneys-in-fact and agents or any of them, or their
or his substitute or substitutes, may lawfully do or cause to be done by virtue
hereof.
 
   Pursuant to the requirements of the Securities Act, this Registration
Statement has been signed by the following persons in the capacities and on the
dates indicated.
 
<TABLE>
<CAPTION>
              Signature                          Title                   Date
              ---------                          -----                   ----
 
<S>                                    <C>                        <C>
          /s/ John J. Rigas            Chairman, President and        May 6, 1999
______________________________________  Chief Executive Officer
            John J. Rigas
 
         /s/ Michael J. Rigas          Executive Vice President       May 6, 1999
______________________________________  and Director
           Michael J. Rigas
 
         /s/ Timothy J. Rigas          Executive Vice President,      May 6, 1999
______________________________________  Chief Financial Officer,
           Timothy J. Rigas             Chief Accounting Officer,
                                        Treasurer and Director
 
          /s/ James P. Rigas           Executive Vice President       May 6, 1999
______________________________________  and Director
            James P. Rigas
 
        /s Daniel R. Milliard          Senior Vice President,         May 6, 1999
______________________________________  Secretary and Director
          Daniel R. Milliard
 
                                       Director
______________________________________
          Perry S. Patterson
 
                                       Director
______________________________________
            Pete J. Metros
 
                                       Director
______________________________________
           Dennis P. Coyle
 
</TABLE>
 
 
                                      II-4
<PAGE>
 
                                 Exhibit Index
 
<TABLE>
<CAPTION>
   Exhibit
     No.                    Reference
   -------                  ---------
   <C>     <S>                                           <C>
     1.01  Forms of Underwriting Agreements              To be filed by Form 8-K.
                                                         (File No. 0-16014)
     4.01  The Certificate of Incorporation of           Incorporated herein by reference
           Adelphia Communications Corporation           is Exhibit 3.01 to Registrant's
                                                         Current Report on Form 8-K dated
                                                         July 24, 1997. (File No. 0-16014)
     4.02  Bylaws of Adelphia Communications             Incorporated herein by reference
           Corporation                                   is Exhibit 3.02 to Registrant's
                                                         Current Report on Form 8-K for the
                                                         event dated April 9, 1999. (File
                                                         No. 0-16014)
     4.03  Senior Debt Indenture dated as of April 28,   Incorporated herein by reference
           1999, between Adelphia Communications         is Exhibit 4.01 to Registrant's
           Corporation and Bank of Montreal Trust        Current Report on Form 8-K for
           Company, Trustee                              event dated April 28, 1999 (File
                                                         No. 0-16104)
     4.04  Form of Subordinated Debt Indenture between   Incorporated herein by reference
           Adelphia Communications Corporation and       is Exhibit 4.03 to Registration
                                                         Statement No. 333-57849.
     4.05  Certificate of Designations for 5 1/2%        Incorporated herein by reference
           Series D Convertible Preferred Stock          is Exhibit 3.01 to Registrant's
                                                         Current Report on Form 8-K for the
                                                         event dated April 28, 1999. (File
                                                         No. 0-16104)
     5.01  Opinion of Buchanan Ingersoll Professional    Filed herewith.
           Corporation
    12.01  Computation of Ratio of Earnings to           Incorporated by reference is
           Combined Fixed Charges and Preferred Stock    Exhibit 12.01 to Registration
           Dividends                                     Statement No. 333-72005.
    23.01  Consent of Buchanan Ingersoll Professional    Filed herewith.
           Corporation (included in Exhibit 5.01)
    23.02  Consent of Deloitte & Touche LLP with         Filed herewith.
           respect to financial statements of Adelphia
           and Olympus
    23.03  Consent of Deloitte & Touche LLP with         Filed herewith.
           respect to financial statements of Century
    23.04  Consent of Deloitte & Touche LLP with         Filed herewith.
           respect to financial statements of Harron
    23.05  Consent of KPMG LLP with respect to           Filed herewith.
           financial statements of FrontierVision
    24.01  Power of Attorney (included on the            Filed herewith.
           signature page of the Registration
           Statement)
    25.01  Statement of Eligibility of Trustee           To be filed by amendment.
</TABLE>
 

<PAGE>
 
                                                                    EXHIBIT 5.01

                  Buchanan Ingersoll Professional Corporation
                               One Oxford Centre
                          301 Grant Street, 20th Floor
                           Pittsburgh, PA 15219-1410
                                  May 6, 1999

Adelphia Communications Corporation
Main at Water Street
Coudersport, Pennsylvania 16915

Re:   Adelphia Communications Corporation

Ladies and Gentlemen:

     We have acted as counsel to Adelphia Communications Corporation, a Delaware
corporation ("Adelphia" or the "Company"), in connection with the preparation of
a Registration Statement on Form S-3, registering up to $4,601,880,000 in
securities and to which this opinion is an exhibit (as amended and supplemented,
the "Registration Statement"), including the form of prospectus included therein
(as supplemented, the "Prospectus"), filed by the Company with the Securities
and Exchange Commission (the "Commission") under the Securities Act of 1933, as
amended (the "Act"), relating to the public offering of: (i) debentures, notes
and other debt securities in one or more series (the "Debt Securities") of
Adelphia which may be senior debt securities or subordinated debt securities of
Adelphia, (ii) shares of Preferred Stock, $.01 par value per share (the
"Preferred Stock") of Adelphia issuable in series designated by the Board of
Directors of Adelphia, (iii) shares of Class A Common Stock, $.01 par value per
share (the "Class A Common Stock") of Adelphia, and (iv) shares of Class B
Common Stock, $.01 par value per share (the "Class B Common Stock") of Adelphia.
The Debt Securities, the Preferred Stock, the Class A Common Stock and the Class
B Common Stock are collectively referred to herein as the "Securities." The
Securities may be offered in combination or separately from time to time by the
Company in amounts, at prices and on terms to be determined at the time or times
of offering. The aggregate initial offering price of all of the Securities which
may be sold pursuant to the Prospectus will not exceed $5,000,000,000 (including
Securities being carried forward from registration statement (No. 333-74219)
included therein pursuant to Commission Rule 429).

     This opinion is being delivered in accordance with the requirements of Item
601(b)(5)(i) of Regulation S-K under the Act.

     In connection with this opinion, we have examined originals or copies,
certified or otherwise identified to our satisfaction, of such documents,
certificates or records as we have deemed necessary or appropriate as bases for
the opinions set forth herein.  In our examination, we have assumed the legal
capacity of all natural persons, the genuineness of all signatures, the
authenticity of all documents submitted to us as originals, the conformity to
original documents of all documents submitted to us as certified or photostatic
copies and the authenticity of the originals of such copies.
   
<PAGE>
 
     Based on the foregoing, and subject to the other qualifications and
limitations set forth herein, we are of the following opinion:

          1.  When (a) the issuance, execution and delivery by the Company of
any of the Debt Securities shall have been duly authorized by all necessary
corporate actions of the Company, and (b) Debt Securities shall have been duly
executed and delivered by the Company, authenticated by the Trustee (the
"Trustee") under the indenture (the "Indenture") pursuant to which the Debt
Securities shall be issued and sold as contemplated by each of the Registration
Statement, the Prospectus, and any prospectus supplement relating to such Debt
Securities and the Indenture, assuming that the terms of such Debt Securities
are in compliance with then applicable law, such Debt Securities will be validly
issued and will constitute valid and binding obligations of the Company
enforceable against the Company in accordance with their terms, except as may be
limited by applicable bankruptcy, insolvency, reorganization, moratorium or
other similar laws affecting the rights of creditors generally and by general
principles of equity and judicial discretion, including principles of commercial
reasonableness, good faith and fair dealing (whether considered in a proceeding
at law or in equity).

          2.  When (a) the terms of the issuance and sale of the Preferred Stock
shall have been duly authorized by all necessary corporate actions of the
Company, and (b) the shares of the Preferred Stock shall have been duly issued
and delivered as contemplated by each of the Registration Statement, the
Prospectus, and any prospectus supplement relating thereto and paid for with the
consideration fixed therefor by the Board of Directors or a duly authorized
committee therefor, assuming that the Company has reserved for issuance the
requisite number of shares of Preferred Stock, the Preferred Stock will be duly
authorized, validly issued, fully paid and nonassessable.

          3.  When (a) the terms of the issuance and sale of the Class A Common
Stock shall have been duly authorized by all necessary corporate actions of the
Company, and (b) the shares of Class A Common Stock shall have been duly issued
and delivered as contemplated by each of the Registration Statement, the
Prospectus, and any prospectus supplement relating thereto and paid for with the
consideration fixed therefor by the Board of Directors or a duly authorized
committee therefor, assuming that the Company has reserved for issuance the
requisite number of shares of Class A Common Stock, the Class A Common Stock
will be duly authorized, validly issued, fully paid and nonassessable.

          4.  When (a) the terms of the issuance and sale of the Class B Common 
Stock shall have been duly authorized by all necessary corporate actions of the
Company, and (b) the shares of Class B Common Stock shall have been duly issued
and delivered as contemplated by each of the Registration Statement, the
Prospectus, and any prospectus supplement relating thereto and paid for with the
consideration fixed therefor by the Board of Directors or a duly authorized
committee therefor, assuming that the Company has reserved for issuance the
requisite number of shares of Class B Common Stock, the Class B Common Stock
will be duly authorized, validly issued, fully paid and nonassessable.
  
     In rendering the above opinions, we have assumed in all cases that the
Registration Statement has been declared effective by order of the Commission
and remains in effect.  We hereby consent to the filing of this opinion as an
exhibit to the Registration Statement and the reference to this firm under the
caption "Legal Matters" in the Prospectus contained therein.

                              BUCHANAN INGERSOLL PROFESSIONAL CORPORATION


                              By:  /s/ Carl E. Rothenberger, Jr.
                                 -------------------------------

<PAGE>
 
                                                                   Exhibit 23.02
 
                         INDEPENDENT AUDITORS' CONSENT
 
We consent to the incorporation by reference in this Registration Statement of
Adelphia Communications Corporation on Form S-3 of our report dated June 10,
1998 and our report dated March 6, 1998 on our audits of the financial
statements of Adelphia Communications Corporation and subsidiaries and of
Olympus Communications, L.P. and subsidiaries, respectively, appearing in and
incorporated by reference in the Annual Report on Form 10-K of Adelphia
Communications Corporation for the year ended March 31, 1998, and to the
reference to us under the heading "Experts" in the prospectus, which is part of
this Registration Statement.
 
/s/ Deloitte & Touche LLP
 
Pittsburgh, Pennsylvania
May 7, 1999

<PAGE>
 
                                                                   EXHIBIT 23.03
 
                         INDEPENDENT AUDITORS' CONSENT
 
We consent to the incorporation by reference in this Registration Statement of
Adelphia Communications Corporation on Form S-3 of our report dated August 4,
1998, with respect to the consolidated balance sheets of Century Communications
Corp. and subsidiaries as of May 31, 1998 and 1997, and the related
consolidated statements of operations and cash flows for each of the three
years in the period ended May 31, 1998, included in the Current Report on Form
8-K, filed April 19, 1999 by Adelphia Communications Corporation, incorporated
by reference in this Registration Statement and to the reference to us under
the heading "Experts" in the prospectus, which is part of this Registration
Statement.
 
/s/ Deloitte & Touche LLP
 
Stamford, Connecticut
May 7, 1999

<PAGE>
 
                                                                   EXHIBIT 23.04
 
                         INDEPENDENT AUDITORS' CONSENT
 
We consent to the incorporation by reference in this Registration Statement of
Adelphia Communications Corporation on Form S-3 of our report dated March 19,
1999 (April 12, 1999 as to Note 16), with respect to the consolidated balance
sheets of Harron Communications Corp. and subsidiaries as of December 31, 1998
and 1997, and the related consolidated statements of income, stockholders'
equity and comprehensive income and cash flows for each of the three years in
the period ended December 31, 1998, which report appears in Adelphia
Communications Corporation's Current Report on Form 8-K dated April 19, 1999.
We also consent to the reference to our firm under the heading "Experts" in the
prospectus, which is part of this Registration Statement.
 
/s/ Deloitte & Touche LLP
 
Philadelphia, Pennsylvania
May 7, 1999

<PAGE>
 
                                                                   EXHIBIT 23.05
 
                        CONSENT OF INDEPENDENT AUDITORS
 
We consent to the incorporation by reference in this Registration Statement on
Form S-3, of Adelphia Communications Corporation, of our report, dated March
19, 1999, relating to the consolidated balance sheets of FrontierVision
Partners, L.P. and subsidiaries as of December 31, 1998 and 1997, and the
related consolidated statements of operations, partners' deficit and cash flows
for each of the years in the three year period ended December 31, 1998, which
report appears in the April 19, 1999 Current Report on Form 8-K of Adelphia
Communications Corporation which is incorporated by reference herein and to the
reference to our firm under the heading "Experts" in the registration
statement.
 
/s/ KPMG LLP
 
Denver, Colorado
May 7, 1999


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