ADDVANTAGE MEDIA GROUP INC /OK
SC 13D/A, 1998-11-18
PROFESSIONAL & COMMERCIAL EQUIPMENT & SUPPLIES
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                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 13D
                                 (Rule 13d-101)

  INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13d-1(a) AND
               AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2(a)

                               (Amendment No. 1)*

                          ADDvantage Media Group, Inc.
- --------------------------------------------------------------------------------
                                (Name of Issuer)


                                  Common Stock
- --------------------------------------------------------------------------------
                         (Title of Class of Securities)


                                    006743108
                   -------------------------------------------
                                 (CUSIP NUMBER)


                   Calvin Hori, Hori Capital Management, Inc.,
                      One Washington Mall, Boston, MA 02108
                                 (617) 367-3800
- --------------------------------------------------------------------------------
            (Name, Address and Telephone Number of Person Authorized
                     to Receive Notices and Communications)


                                  July 9, 1998
              -----------------------------------------------------
             (Date of Event which Requires Filing of this Statement)

If the filing person has previously filed a statement on Schedule 13G to report
the acquisition which is the subject of this Schedule 13D, and is filing this
schedule because of Rule 13d-1(e), 13d-1(f) or 13d-1(g), check the following
box [ ].

Note: Schedules filed in paper format shall include a signed original and five
copies of the schedule, including all exhibits. See Rule 13d-7(b) for other
parties to whom copies are to be sent.

*The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities, and
for any subsequent amendment containing information which would alter
disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the Securities and Exchange Act
of 1934 ("Act") or otherwise subject to the liabilities of that section of the
Act but shall be subject to all other provisions of the Act (However, see the
Notes).

<PAGE>


|-----------------------|                         |--------------------------|
|CUSIP No. 006743108    |                         |    Page 2 of 9 Pages     |
|-----------------------|                         |--------------------------|

|----------------------------------------------------------------------------|
|    1    |  NAME OF REPORTING PERSON                                        |
|         |  S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON               |
|         |                                                                  |
|         |  Hori Capital Management, Inc.                                   |
|---------|------------------------------------------------------------------|
|    2    |  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*       (a) [ ] |
|         |                                                          (b) [ ] |
|---------|------------------------------------------------------------------|
|    3    |  SEC USE ONLY                                                    |
|         |                                                                  |
|---------|------------------------------------------------------------------|
|    4    |  SOURCE OF FUNDS*                                                |
|         |                                                                  |
|         |  WC                                                              |
|---------|------------------------------------------------------------------|
|    5    |  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED        |
|         |  PURSUANT TO ITEMS 2(d) or 2(e)                              [ ] |
|---------|------------------------------------------------------------------|
|    6    |  CITIZENSHIP OR PLACE OF ORGANIZATION                            |
|         |                                                                  |
|         |  Massachusetts                                                   |
|----------------|-----|-----------------------------------------------------|
|                |  7  |   SOLE VOTING POWER                                 |
|                |     |   0                                                 |
|   NUMBER OF    |-----|-----------------------------------------------------|
|     SHARES     |  8  |   SHARED VOTING POWER                               |
|  BENEFICIALLY  |     |   0                                                 |
| OWNED BY EACH  |-----|-----------------------------------------------------|
|   REPORTING    |  9  |   SOLE DISPOSITIVE POWER                            |
|     PERSON     |     |   0                                                 |
|      WITH      |-----|-----------------------------------------------------|
|                |  10 |   SHARED DISPOSITIVE POWER                          |
|                |     |   0                                                 |
|----------------------------------------------------------------------------|
|   11    |  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON    |
|         |                                                                  |
|         |  0                                                               |
|---------|------------------------------------------------------------------|
|   12    |  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11)                   |
|         |  EXCLUDES CERTAIN SHARES*                                    [ ] |
|         |                                                                  |
|---------|------------------------------------------------------------------|
|   13    |  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)              |
|         |                                                                  |
|         |  0                                                               |
|---------|------------------------------------------------------------------|
|   14    |  TYPE OF REPORTING PERSON *                                      |
|         |                                                                  |
|         |  CO                                                              |
|----------------------------------------------------------------------------|


                                       2

<PAGE>


                              SCHEDULE 13D
|-----------------------|                         |--------------------------|
|CUSIP No. 006743108    |                         |    Page 3 of 9 Pages     |
|-----------------------|                         |--------------------------|

|----------------------------------------------------------------------------|
|    1    |  NAME OF REPORTING PERSON                                        |
|         |  S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON               |
|         |                                                                  |
|         |  Platinum Partners, L.P.                                         |
|---------|------------------------------------------------------------------|
|    2    |  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*       (a) [ ] |
|         |                                                          (b) [ ] |
|---------|------------------------------------------------------------------|
|    3    |  SEC USE ONLY                                                    |
|         |                                                                  |
|---------|------------------------------------------------------------------|
|    4    |  SOURCE OF FUNDS*                                                |
|         |                                                                  |
|         |  WC                                                              |
|---------|------------------------------------------------------------------|
|    5    |  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED        |
|         |  PURSUANT TO ITEMS 2(d) or 2(e)                              [ ] |
|---------|------------------------------------------------------------------|
|    6    |  CITIZENSHIP OR PLACE OF ORGANIZATION                            |
|         |                                                                  |
|         |  Massachusetts                                                   |
|----------------|-----|-----------------------------------------------------|
|                |  7  |   SOLE VOTING POWER                                 |
|                |     |   0                                                 |
|   NUMBER OF    |-----|-----------------------------------------------------|
|     SHARES     |  8  |   SHARED VOTING POWER                               |
|  BENEFICIALLY  |     |   0                                                 |
| OWNED BY EACH  |-----|-----------------------------------------------------|
|   REPORTING    |  9  |   SOLE DISPOSITIVE POWER                            |
|     PERSON     |     |   0                                                 |
|      WITH      |-----|-----------------------------------------------------|
|                |  10 |   SHARED DISPOSITIVE POWER                          |
|                |     |   0                                                 |
|----------------------------------------------------------------------------|
|   11    |  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON    |
|         |                                                                  |
|         |  0                                                               |
|---------|------------------------------------------------------------------|
|   12    |  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11)                   |
|         |  EXCLUDES CERTAIN SHARES*                                    [ ] |
|         |                                                                  |
|---------|------------------------------------------------------------------|
|   13    |  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)              |
|         |                                                                  |
|         |  0                                                               |
|---------|------------------------------------------------------------------|
|   14    |  TYPE OF REPORTING PERSON *                                      |
|         |                                                                  |
|         |  PN                                                              |
|----------------------------------------------------------------------------|


                                       3

<PAGE>


|-----------------------|                         |--------------------------|
|CUSIP No. 006743108    |                         |    Page 4 of 9 Pages     |
|-----------------------|                         |--------------------------|

|----------------------------------------------------------------------------|
|    1    |  NAME OF REPORTING PERSON                                        |
|         |  S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON               |
|         |                                                                  |
|         |  Calvin G. Hori, Sole Shareholder                                |
|---------|------------------------------------------------------------------|
|    2    |  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*       (a) [ ] |
|         |                                                          (b) [ ] |
|---------|------------------------------------------------------------------|
|    3    |  SEC USE ONLY                                                    |
|         |                                                                  |
|---------|------------------------------------------------------------------|
|    4    |  SOURCE OF FUNDS*                                                |
|         |                                                                  |
|         |  WC                                                              |
|---------|------------------------------------------------------------------|
|    5    |  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED        |
|         |  PURSUANT TO ITEMS 2(d) or 2(e)                              [ ] |
|---------|------------------------------------------------------------------|
|    6    |  CITIZENSHIP OR PLACE OF ORGANIZATION                            |
|         |                                                                  |
|         |  United States Citizen                                           |
|----------------|-----|-----------------------------------------------------|
|                |  7  |   SOLE VOTING POWER                                 |
|                |     |   0                                                 |
|   NUMBER OF    |-----|-----------------------------------------------------|
|     SHARES     |  8  |   SHARED VOTING POWER                               |
|  BENEFICIALLY  |     |   0                                                 |
| OWNED BY EACH  |-----|-----------------------------------------------------|
|   REPORTING    |  9  |   SOLE DISPOSITIVE POWER                            |
|     PERSON     |     |   0                                                 |
|      WITH      |-----|-----------------------------------------------------|
|                |  10 |   SHARED DISPOSITIVE POWER                          |
|                |     |   0                                                 |
|----------------------------------------------------------------------------|
|   11    |  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON    |
|         |                                                                  |
|         |  0                                                               |
|---------|------------------------------------------------------------------|
|   12    |  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11)                   |
|         |  EXCLUDES CERTAIN SHARES*                                    [ ] |
|         |                                                                  |
|---------|------------------------------------------------------------------|
|   13    |  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)              |
|         |                                                                  |
|         |  0                                                               |
|---------|------------------------------------------------------------------|
|   14    |  TYPE OF REPORTING PERSON*                                       |
|         |                                                                  |
|         |  IN                                                              |
|----------------------------------------------------------------------------|


                                       4

<PAGE>


1.       Security and Issuer

         This Report on Schedule 13D relates to shares of common stock, $0.01
par value (the "Common Stock"), of ADDvantage Media Group, Inc. (the "Company"),
whose principal executive offices are located at Meridien Tower, Suite 1080,
5100 East Skelly Drive, Tulsa, OK 74135-6552.

2.       Identity and Background

         This Report is filed by Platinum Partners, L.P., a Massachusetts
limited partnership (the "Partnership"), having its principal place of business
and executive offices at c/o Hori Capital Management, Inc., One Washington Mall,
7th Floor, Boston, MA 02108; Hori Capital Management, Inc., a Massachusetts
corporation having its principal place of business and executive offices at One
Washington Mall, 7th Floor, Boston, MA 02108 ("Hori Capital Management"); and
Mr. Calvin G. Hori, the sole shareholder, director and President of Hori Capital
Management ("Mr. Hori"), having his business address at c/o Hori Capital
Management, Inc., One Washington Mall, 7th Floor, Boston, MA 02108
(collectively, the "Reporting Persons"). The principal business of each
Reporting Person is to make, manage, supervise, and dispose of investments in a
variety of businesses. Hori Capital Management is the sole General Partner of
the Partnership and one of several investment advisers to Micro Cap Partners,
Ltd. ("Micro Cap").

         During the last five years, the Reporting Persons have not been
convicted in a criminal proceeding (excluding traffic violations or similar
misdemeanors), and have not been a party to a civil proceeding of a judicial or
administrative body of competent jurisdiction and are not, as a result of any
such proceeding, subject to a judgment, decree or final order enjoining future
violations of, or prohibiting or mandating activities subject to, federal or
state securities laws or finding any violation with respect to such laws.

         Mr. Hori is a United States citizen.

3.       Source and Amount of Funds or Other Consideration

         The source of funds for the Partnership's and Micro Cap's acquisition
of the securities described in Item 5(c) were assets of the Partnership and of
Micro Cap.

4.       Purpose of Transaction

         The Partnership and Micro Cap acquired the Common Stock described in
Item 5(c) for investment purposes. None of the Reporting Persons have any plans
or proposals which relate to or would result in:

                  a.  The acquisition by any person of additional securities of
                      the issuer, or the disposition of securities of the
                      issuer;

                  b.  An extraordinary corporate transaction, such as a merger,
                      reorganization or liquidation, involving the issuer or any
                      of its subsidiaries;


                                        5

<PAGE>


                  c.  A sale or transfer of a material amount of assets of the
                      issuer or any of its subsidiaries;

                  d.  Any change in the present board of directors or management
                      of the issuer, including any plans or proposals to change
                      the number or term of directors or to fill any existing
                      vacancies on the board;

                  e.  Any material change in the present capitalization or
                      dividend policy of the issuer;

                  f.  Any other material change in the issuer's business or
                      corporate structure including but not limited to, if the
                      issuer is a registered closed-end investment company, any
                      plans or proposals to make any change in its investment
                      policy for which a vote is required by Section 13 of the
                      Investment Company Act of 1940;

                  g.  Changes in the issuer's charter, bylaws or instruments
                      corresponding thereto or other actions which may impede
                      the acquisition of control of the issuer by any person;

                  h.  Causing a class of securities of the issuer to be delisted
                      from a national securities exchange or to cease to be
                      authorized to be quoted in an inter-dealer quotation
                      system of a registered national securities association;

                  i.  A class of equity securities of the issuer becoming
                      eligible for termination of registration pursuant to
                      Section 1(g)(4) of the Securities Exchange Act of 1934; or

                  j.  Any action similar to any of those enumerated above.

5.       Interest in Securities of the Issuer

                  a.  As of July 9, 1998, Hori Capital Management, Calvin G.
                      Hori and the Partnership may be deemed to beneficially own
                      0 shares of Common Stock of the Company. On such date,
                      Hori Capital Management, Calvin G. Hori and the
                      Partnership sold all the shares of Common Stock of the
                      Company that it then held.

                  b.  Not Applicable.

                  c.  The Partnership has made the following sales of shares of
                      Common Stock:


                                        6

<PAGE>


<TABLE>
<CAPTION>
                                                                  Aggregate
    Transaction                                Price Per          Purchase
       Date              # of Shares             Share              Price
    -----------------------------------------------------------------------
      <S>                  <C>                    <C>              <C>
      5/11/98              140,000                0.60              84,000
      5/13/98              200,000                0.63             125,000
      5/19/98               65,000                0.50              32,500
      5/20/98               35,000                0.50              17,500
      6/11/98                6,500                0.50               3,250
      6/15/98               43,500                0.53              23,098
      6/18/98               25,000                0.52              12,875
      6/24/98               65,000                0.35              22,490
      6/25/98               25,000                0.38               9,375
      6/30/98               18,000                0.50               9,000
       7/9/98               12,900                0.42               5,379
</TABLE>

      Micro Cap has made the following sales of shares of Common Stock:

<TABLE>
<CAPTION>

                                                                    Aggregate
    Transaction                                Price Per            Purchase
       Date              # of Shares             Share                Price
    --------------------------------------------------------------------------
      <S>                  <C>                    <C>                <C>
      5/11/98              110,000                0.60               66,000
</TABLE>


                      All transactions were made in the open market on NASDAQ.

                  d.  The Partnership and Micro Cap are each limited
                      partnerships. Each partner of the Partnership is entitled
                      to receive certain distributions from the Partnership's
                      assets as specified in the Partnership's governing
                      documents. Similarly, each partner of Micro Cap is
                      entitled to receive certain distributions from Micro Cap's
                      assets as specified in Micro Cap's governing documents.
                      These distributions may include funds received by the
                      Partnership or Micro Cap from dividends declared with
                      respect to the shares of Common Stock held by the
                      Partnership or Micro Cap or from the sale of such shares
                      of Common Stock.

                  e.  July 9, 1998.

         The filing of this statement shall not be construed as an admission
that any of the Reporting Persons are, for the purposes of Sections 13(d) or
13(g) of the


                                        7

<PAGE>


Securities Exchange Act of 1934, the beneficial owners of any securities covered
by this statement.

6.       Contracts, Arrangements, Understandings or Relationships with Respect
         to Securities of the Issuer

         There are no contracts, arrangements, understandings or relationships
(legal or otherwise) between or among any of the Reporting Persons and any other
person with respect to any securities of the Company other than (a) the
governing documents of the Partnership and Micro Cap and (b) the investment
advisory agreement between Hori Capital Management and Micro Cap.

7.       Material to be Filed as Exhibits


         Exhibit 1 - Agreement regarding filing of joint Schedule 13D.







                                        8

<PAGE>


Signature

         After reasonable inquiry and to the best of the knowledge and belief of
the undersigned, each of the undersigned hereby certifies that the information
set forth in this statement is true, complete and correct.

         EXECUTED as a sealed instrument this 17th day of November, 1998.

                                           PLATINUM PARTNERS, L.P.


                                           By: /s/ Calvin G. Hori
                                               ---------------------------------
                                               Calvin G. Hori, President of Hori
                                               Capital Management, Inc., General
                                               Partner



                                           HORI CAPITAL MANAGEMENT, INC.


                                           By: /s/ Calvin G. Hori
                                               ---------------------------------
                                               Calvin G. Hori, President



                                               /s/ Calvin G. Hori
                                               ---------------------------------
                                               Calvin G. Hori



                                        9


<PAGE>


                                                                       Exhibit 1

                                    AGREEMENT

         Pursuant to Rule 13d-1(f)(1) under the Securities Exchange Act of 1934,
as amended, the undersigned hereby agree that only one statement containing the
information required by Schedule 13D need be filed with respect to the
beneficial ownership by each of the undersigned of the shares of Common Stock of
ADDvantage Media Group, Inc.

         EXECUTED as a sealed instrument this 17th day of November, 1998.

                                           PLATINUM PARTNERS, L.P.


                                           By: /s/ Calvin G. Hori
                                               ---------------------------------
                                               Calvin G. Hori, President of Hori
                                               Capital Management, Inc., General
                                               Partner



                                           HORI CAPITAL MANAGEMENT, INC.


                                           By: /s/ Calvin G. Hori
                                               ---------------------------------
                                               Calvin G. Hori, President



                                               /s/ Calvin G. Hori
                                               ---------------------------------
                                               Calvin G. Hori




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