SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, DC 20549

                                 SCHEDULE 13D/A
                                 (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)


                           CIRCUIT RESEARCH LABS, INC.
                                (Name of Issuer)


                          COMMON STOCK, $0.10 PAR VALUE
                         (Title of Class of Securities)


                                    172743205
                                 (CUSIP Number)

                                  EDWIN SUMMERS
                       VICE PRESIDENT AND GENERAL COUNSEL
                  HARMAN INTERNATIONAL INDUSTRIES, INCORPORATED
                                8500 BALBOA BLVD.
                          NORTHRIDGE, CALIFORNIA 91329
                                 (218) 893-8411
                  (Name, Address and Telephone Number of Person
                Authorized to Receive Notices and Communications)


                                 with a copy to:

                                JAMES E. O'BANNON
                                    JONES DAY
                               2727 NORTH HARWOOD
                               DALLAS, TEXAS 75201
                                 (214) 220-3939
                                 MARCH 28, 2003
             (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 that 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. |_|

                         (continued on following pages)

                               Page 1 of 10 Pages




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CUSIP NO. 172743205                  13D/A                    PAGE 2 OF 10 PAGES
-------------------                                           ------------------


--------------------------------------------------------------------------------
1       Name of Reporting Person

        Harman Acquisition Corp.
--------------------------------------------------------------------------------
2       Check the Appropriate Box if a Member of a Group         (a) |_|
                                                                 (b) |_|

--------------------------------------------------------------------------------
3       SEC Use Only

--------------------------------------------------------------------------------
4       Source of Funds

        00
--------------------------------------------------------------------------------
5       Check if Disclosure of Legal Proceedings is Required Pursuant to
         Item 2(d) or 2(e)    |_|

--------------------------------------------------------------------------------
6       Citizenship or Place of Organization

        Delaware
--------------------------------------------------------------------------------
         Number of             7      Sole Voting Power
          Shares
                                      1,395,690(1)
                               -------------------------------------------------
        Beneficially           8      Shared Voting Power

                                      0
                               -------------------------------------------------
         Owned by              9      Sole Dispositive Power
           Each
                                      1,395,690(1)
                               -------------------------------------------------
        Reporting              10     Shared Dispositive Power
       Person With
                                      0
--------------------------------------------------------------------------------
11      Aggregate Amount Beneficially Owned by Each Reporting Person

        1,395,690(1)
--------------------------------------------------------------------------------
12      Check if the Aggregate Amount in Row (11) Excludes Certain Shares  |_|

--------------------------------------------------------------------------------
13      Percent of Class Represented by Amount in Row (11)

        27.4%(2)
--------------------------------------------------------------------------------
14      Type of Reporting Person

        CO
--------------------------------------------------------------------------------

--------
(1)    All shares of common stock, par value $.10 per share ("Common Stock") of
       Circuit Research Labs, Inc., an Arizona corporation ("CRL"), covered by
       this statement may be acquired by Harman Acquisition Corp. ("HAC") upon
       exercise of a warrant issued to HAC as of May 31, 2000 (the "Warrant").
       Prior to the exercise of the Warrant, HAC is not entitled to any rights
       as a stockholder of CRL.

(2)    Based on 3,706,880 shares outstanding at November 1, 2002 according to
       the Quarterly Report on Form 10-QSB filed by Circuit Research Labs, Inc.
       for the quarter ended September 30, 2002, plus 1,395,690 shares issuable
       upon exercise of the Warrant described in Item 6 below.




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CUSIP NO. 172743205                  13D/A                    PAGE 3 OF 10 PAGES
-------------------                                           ------------------


--------------------------------------------------------------------------------
1       Name of Reporting Person

        Harman International Industries, Incorporated
--------------------------------------------------------------------------------
2       Check the Appropriate Box if a Member of a Group         (a) |_|
                                                                 (b) |_|

--------------------------------------------------------------------------------
3       SEC Use Only

--------------------------------------------------------------------------------
4       Source of Funds

        00
--------------------------------------------------------------------------------
5       Check if Disclosure of Legal Proceedings is Required Pursuant to
         Item 2(d) or 2(e)    |_|

--------------------------------------------------------------------------------
6       Citizenship or Place of Organization

        Delaware
--------------------------------------------------------------------------------
          Number of            7      Sole Voting Power
           Shares
                                      0
                               -------------------------------------------------
        Beneficially           8      Shared Voting Power

                                      1,395,690(1)
                               -------------------------------------------------
          Owned by             9      Sole Dispositive Power
            Each
                                      0
                               -------------------------------------------------
          Reporting            10     Shared Dispositive Power
         Person With
                                      1,395,690(1)
--------------------------------------------------------------------------------
11      Aggregate Amount Beneficially Owned by Each Reporting Person

        1,395,690(1)
--------------------------------------------------------------------------------
12      Check if the Aggregate Amount in Row (11) Excludes Certain Shares  |_|

--------------------------------------------------------------------------------
13      Percent of Class Represented by Amount in Row (11)

        27.4%(2)
--------------------------------------------------------------------------------
14      Type of Reporting Person

        CO
--------------------------------------------------------------------------------

----------
(1)    All shares of Common Stock covered by this statement may be acquired by
       HAC upon exercise of the Warrant described in Item 6 below. HAC is a
       wholly owned subsidiary of Harman International Industries, Incorporated
       ("Harman"). As such, Harman may be deemed to have shared voting and
       dispositive power with respect to the shares covered by this Schedule
       13D.

(2)    Based on 3,706,880 shares outstanding at November 1, 2002 according to
       the Quarterly Report on Form 10-QSB filed by Circuit Research Labs, Inc.
       for the quarter ended September 30, 2002, plus 1,395,690 shares issuable
       upon exercise of the Warrant described in Item 6 below.



       This Amendment No. 1 (this "Amendment") amends the joint statement on
Schedule 13D filed with the Securities and Exchange Commission on March 13, 2002
(the "Schedule 13D") by Harman International Industries, Incorporated ("Harman")
and its wholly owned subsidiary, Harman Acquisition Corp. ("HAC"), relating to
the common stock, par value $0.10 per share (the "Common Stock"), of Circuit
Research Labs, Inc., an Arizona corporation ("CRL"). Capitalized terms used but
not otherwise defined in this Amendment have the meanings given to those terms
in the Schedule 13D.

       Items 4, 5, 6 and 7 of the Schedule 13D are hereby amended and restated
in their entirety as follows:

ITEM 4.       PURPOSE OF TRANSACTION.

       In connection with the sale by HAC of substantially all of the assets of
HAC to CRL Systems, Inc. ("Systems"), CRL issued the Warrant to HAC. The
beneficial ownership of Common Stock by Harman and HAC reported in this
statement is based solely on the ownership of the Warrant (as defined below in
Item 6). The Warrant will expire on May 31, 2003.

       HAC has no present intent to exercise the Warrant.

       Except for the Proposed Restructuring (as defined in Item 6) contemplated
by the Letter Agreement (as defined in Item 6) or as otherwise described in the
response to Item 6, neither Harman nor HAC have formulated any plans or
proposals which relate to or would result in: (i) acquisition or disposition of
securities of CRL; (ii) an extraordinary corporate transaction involving CRL or
any of its subsidiaries; (iii) a sale or transfer of a material amount of the
assets of CRL or any of its subsidiaries; (iv) any change in the present board
of directors or management of CRL; (v) any material change in CRL's
capitalization or dividend policy; (vi) any other material change in CRL's
business or corporate structure; (vii) any change in CRL's charter or bylaws or
other instruments corresponding thereto or other action which may impede the
acquisition of control of CRL by any person; (viii) causing a class of CRL's
securities becoming deregistered or delisted; (ix) causing a class of CRL's
equity securities to become eligible for termination of registration pursuant to
Section 12(g)(4) of the Securities Exchange Act of 1934, as amended; or (x) an
action similar to any of those enumerated above.

       The response to Item 6 is incorporated herein by reference.

ITEM 5.       INTEREST IN SECURITIES OF THE ISSUER.

       (a) As a result of HAC's ownership of the Warrant, HAC is deemed to
beneficially own 1,395,690 shares of Common Stock or approximately 27.4% of the
Common Stock that would be outstanding after giving effect to the exercise in
full of the Warrant. Harman owns all of the outstanding capital stock of HAC,
and as a result, Harman is deemed to also beneficially own these 1,395,690
shares of Common Stock or approximately 27.4% of the Common Stock that would be
outstanding after giving effect to the exercise in full of the Warrant.

       (b) Under SEC regulations, HAC is deemed to have sole voting and
dispositive power with respect to 1,395,690 shares of Common Stock as a result
of its ownership of the


                               Page 4 of 10 Pages


Warrant. HAC is a wholly owned subsidiary of Harman. As such, under SEC
regulations Harman may be deemed to also have shared voting and dispositive
power with respect to 1,395,690 shares of Common Stock as a result of HAC's
ownership of the Warrant.

       (c)    None.

       (d)    Not applicable

       (e)    Not applicable.

ITEM 6.    CONTRACTS, ARRANGEMENTS, UNDERSTANDINGS OR RELATIONSHIPS
           WITH RESPECT TO SECURITIES OF THE ISSUER.

       On May 31, 2000, Systems and HAC entered into an Asset Sale Agreement
(the "Asset Sale Agreement") pursuant to which Systems acquired substantially
all of the assets of HAC (the "Transaction"). As consideration for the assets of
HAC, HAC received $1,500,000 in cash, a $3.5 million short-term note (the
"Tranche B Note"), a $5 million long-term note (the "Tranche A Note" and,
together with the Tranche B Note, the "Notes") and warrant to purchase 1,000,000
shares of Common Stock, exercisable for $2.25 per share (the "Warrant").

       The Warrant expires on May 31, 2003 and can be exercised either (i) by
payment in cash, (ii) by reducing the amount of the unpaid principal on the
Tranche A Note or the Tranche B Note or (iii) by any combination of (i) and
(ii). The provisions of the Warrant also provide HAC with anti-dilution
protection under certain circumstances, including for stock splits, stock
dividends, combinations, reclassifications and issuances of Common Stock at
prices below the current trading price or the exercise price of the Warrant. As
a result of certain transactions effected by CRL subsequent to the issuance of
the Warrant, the aggregate number of shares of Common Stock issuable upon
exercise of the Warrant increased to 1,395,690 shares, and the exercise price
per share decreased to $1.6121 per share.

       The provisions of the Warrant further provide HAC with certain rights to
cause CRL to register the shares of Common Stock issuable to HAC upon exercise
of the Warrant.

       Under the terms of the Asset Purchase Agreement, Systems and HAC entered
into an $8,500,000 Credit Agreement (the "Credit Agreement") that governs the
repayment of the Notes. In addition, CRL, Systems and HAC entered into a
Guarantee and Collateral Agreement (the "Guarantee") whereby each of CRL and
Systems pledged all of their respective assets, including the stock of Systems,
as collateral for the repayment of the Notes. Among other things, the Guarantee
provides that the cash proceeds received by CRL from any sale of debt or equity
securities or sales of assets by CRL will be applied to pay amounts owed under
the Notes.

       Between May 31, 2000 and May 2, 2002, HAC and Systems agreed to several
payment extensions on the Notes. On October 1, 2001, Systems and HAC entered
into an amendment to the Credit Agreement under which both Notes were amended
and restated (the "Amended Credit Agreement"). Under the Amended Credit
Agreement, the Notes were converted to demand notes payable on the demand of HAC
or if no demand is sooner made, on the dates and in the amounts specified in the
Amended Credit Agreement. Interest only payments remain payable from time to
time for both Notes and are also due on demand. On May 1, 2002, Systems and


                               Page 5 of 10 Pages


HAC entered into a second amendment to the Credit Agreement under which both
notes were again amended and restated (the "Second Amendment to Credit
Agreement"). Under the Second Amendment to Credit Agreement, the requirement for
quarterly principal payments was removed and the maturity date of the Notes was
extended to December 31, 2003.

       On March 28, 2003, HAC, CRL and Systems, entered into a non-binding
letter agreement, dated as of March 27, 2003 (the "Letter Agreement"), which
sets forth the terms of a proposed restructuring (the "Proposed Restructuring")
of the Notes and HAC's investment in CRL. The Letter Agreement contemplates,
among other things, that:

       (a)    CRL will make a cash principal payment on the Notes in an amount
              not less than $1,000,000;

       (b)    HAC will exchange $3.5 million in debt payable under the Notes
              plus the Warrant, for a number of shares of Common Stock such that
              HAC will own 19% of the then-outstanding shares of Common Stock of
              CRL at the time of issuance, determined on a fully diluted basis;
              and

       (c)    CRL and HAC will consolidate amounts owed under the Notes into a
              single senior secured note (the "Amended Note") and amend the
              Credit Agreement to, among other things, (i) provide that accrued
              but unpaid interest on the Notes will be added to the principal
              amount due under the Amended Note, (ii) reduce the interest rate
              and (ii) amend the timing and amount of principal payments.

The Proposed Restructuring is subject to a number of conditions, including
(a) CRL receiving $1.5 million in new common equity investments prior to
April 30, 2003, (b) the negotiation and execution of definitive agreements
setting forth the terms of the Proposed Restructuring, and (c) the approval
of the Boards of Directors of each of CRL and HAC.

       HAC acquired the Warrant (and as a result, beneficial ownership of the
Common Stock issuable upon exercise of the Warrant) as consideration received in
the Transaction. HAC from time to time intends to review its investment in CRL,
including in connection with the Proposed Restructuring contemplated by the
Letter Agreement, on the basis of various factors, including CRL's business,
financial condition, results of operations and prospects, general economic and
industry conditions, the securities markets in general and for CRL's securities
in particular, as well as other developments and other investment opportunities.
Based upon such review, it will take such actions in the future as it may deem
appropriate in light of the circumstances existing from time to time, including
but not limited to demanding payment of all or a portion of the principal and
interest due under the Notes and/or exercising its rights under the Credit
Agreement, as amended, the Guarantee or the Asset Sale Agreement. Depending on
market and other factors, HAC may determine to dispose of some or all of the
Notes and/or the Warrant pursuant to the Proposed Restructuring or otherwise.

       The foregoing descriptions of the Asset Sale Agreement, the Warrant, the
Guarantee and the Letter Agreement are qualified in their entirety by reference
to the copies of such agreements which have been filed as exhibits to this
statement.


                               Page 6 of 10 Pages


ITEM 7.       MATERIAL TO BE FILED AS EXHIBITS.

       The following are filed herewith as Exhibits to the statement:


         EXHIBIT NO.                       DESCRIPTION
         -----------                       -----------

              1      Asset Sale Agreement, dated as of May 31, 2000, between
                     Harman Acquisition Corp. (f/k/a Orban, Inc.) and
                     CRL Systems, Inc.*

              2      Warrant, dated May 31, 2000, issued by Circuit Research
                     Labs, Inc. to Harman Acquisition Corp.*

              3      Guarantee and Collateral Agreement, dated as of May 31,
                     2000, made by Circuit Research Labs, Inc. as Parent,
                     CRL Systems, Inc., as Borrower, in favor of Harman
                     Acquisition Corp., as Lender.*

              4      Joint Filing Agreement*

              5      Letter Agreement, dated as of March 27, 2003, among Circuit
                     Research Labs, Inc., CRL Systems, Inc. and Harman
                     Acquisition Corp.


----------
*      Filed previously as an exhibit to the Schedule 13D









                               Page 7 of 10 Pages


       After reasonable inquiry and to the best of my knowledge and belief, I
certify that the information set forth in this statement is true, complete and
correct.


Dated:  March 31, 2003                 HARMAN ACQUISITION CORP.


                                       By: /s/ FRANK MEREDITH
                                           ------------------------------------
                                           Frank Meredith, Secretary


                                       HARMAN INTERNATIONAL
                                       INDUSTRIES, INCORPORATED

                                       By: /s/ FRANK MEREDITH
                                           ------------------------------------
                                           Frank Meredith, Executive Vice
                                           President and Chief Financial Officer









                               Page 8 of 10 Pages