Document:

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                                                                   EXHIBIT 10.16

                       AMENDMENT NO. 6 TO LOAN AGREEMENT

     THIS AMENDMENT NO. 6 TO LOAN AGREEMENT (the "Amendment") is made and
entered into as of October 10, 2001, by and between LaSALLE BANK NATIONAL
ASSOCIATION, f/k/a LaSALLE NATIONAL BANK, a national banking association (the
"Lender"), and KOSS CORPORATION, a Delaware corporation (the "Borrower").

                                R E C I T A L S:

     Borrower and Lender entered into that certain Loan Agreement dated February
17, 1995, as amended by that certain Amendment No. 1 to Loan Agreement dated
June 15, 1995, as further amended by that certain Amendment No. 2 to Loan
Agreement dated May 20, 1996, as further amended by that certain Amendment No. 3
to Loan Agreement dated December 31, 1997, as further amended by that certain
Amendment No. 4 to Loan Agreement dated April 29, 1999, and as further amended
by that certain Amendment No. 5 dated December 15, 1999 (collectively, the "Loan
Agreement"), pursuant to which Lender agreed to provide Borrower with a
revolving line of credit up to $10,000,000.00 (the "Revolving Loan"); and

     Borrower has requested Lender to extend the Maturity Date of the Revolving
Loan to November 1, 2002, and Lender has agreed to do so provided, among other
things, Borrower executes and delivers this Amendment.

     NOW THEREFORE, in consideration of the premises which are incorporated
herein by this reference, and other good and valuable consideration, the receipt
and sufficiency of which is hereby acknowledged, the parties agree as follows:

     1.   Section 2.1(A) of the Loan Agreement shall be deleted in its entirety
and replaced with the following new Section 2.1(A):

     Subject to the terms and conditions of this Agreement, on the date
     upon which all terms and conditions of the Documents have been met or
     fulfilled to the satisfaction of Lender (the "Closing Date"), the
     Lender agrees to make loans to Borrower on a revolving basis (such
     loans being herein called individually, a "Revolving Loan", and
     collectively, the "Revolving Loans") from time to time in such amounts
     as Borrower may from time to time request up to an aggregate amount
     outstanding of $10,000,000.00; provided, however, that (i) each
     borrowing by Borrower hereunder with respect to any Revolving Loan
     shall be in the aggregate principal amount of at least $10,000.00;
     (ii) the Lender's commitment to make Revolving Loans shall remain in
     effect for a period to and including November 1, 2002 (the "Revolver
     Termination Date"); (iii)

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     notwithstanding any provision herein to the contrary (1) upon the
     occurrence and continuance of any Event of Default, and in each such
     event, the Lender may, in its sole discretion, immediately cease to make
     Revolving Loans; and (2) on the Revolver Termination Date, Borrower shall
     repay to the Lender all Revolving Loans, plus interest accrued to the date
     of payment; and (iv) for a period of at least 30 consecutive days during
     each fiscal year of Borrower, the amount of Revolving Loans outstanding
     shall not exceed $2,000,000.00.

     2.   Subsection 2.1(B)(b) of the Loan Agreement shall be deleted in its
entirety and replaced with the following new Subsection 2.1(B)(b):

     (b)  all Letters of Credit shall expire prior to November 1, 2002.

     3.   Subsection 5.1(S) of the Loan Agreement shall be deleted in its
entirety and replaced with the following new Subsection 5.1(S):

          (s)  Tangible Net Worth. Borrower, on a consolidated basis, shall not
     cause, suffer or permit its Tangible Net Worth (including adjustment for
     transactions with Affiliates) to be less than $10,000,000.00 at any time.

     4.   Borrower shall deliver to Lender as a condition to Lender's
undertakings as provided hereunder, note amendments, a copy of its Articles of
Incorporation certified by the Delaware Secretary of State, a directors'
consent, secretary's certificate and such other documents as Lender shall
request, each in form and substance satisfactory to Lender and its counsel.

     5.   All references to "the Agreement" in the Loan Agreement shall mean
the Loan Agreement as amended by this Amendment. All references to "the Loan,"
"the Loans," in the Loan Agreement shall include the loan amendments made
hereunder. All references to "the Documents" in the Loan Agreement shall
include this Amendment, the amendment to the Revolving Note and any other
instrument or document required hereunder, whether now existing or at any time
hereafter arising. All references to "the Revolving Note" and in Loan Agreement
shall include the amendments thereto.

     6.   All of the agreements, representations, covenants and obligations set
forth in the Loan Agreement and hereby reaffirmed and restated as of the date
of this Amendment. All representations and warranties contained in the Loan
Agreement remain true and correct as of the date of this Amendment.

     7.   Borrower agrees to pay all fees and out-of-pocket expenses of Lender
including, without limitation, outside counsel to the Lender in connection with
the preparation of this Amendment, and any and all

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agreements, instruments and documents required or contemplated by this
Amendment.

     8. Except as specifically amended and modified by this Amendment: (a) the
Loan Agreement shall remain in full force and effect and is hereby restated and
incorporated herein by this reference; and (b) all terms defined in the Loan
Agreement shall have the same meanings herein as therein.

     IN WITNESS WHEREOF, the parties hereto have caused this Amendment No. 6 to
be duly executed and delivered at Chicago, Illinois, as of the date first above
written.

LaSALLE BANK NATIONAL ASSOCIATION KOSS CORPORATION

By: /s/ James J. Hess                   By: /s/ Michael J. Koss
   ----------------------------            ------------------------------

Title:  JAMES J. HESS VICE PRESIDENT    Title:  CEO President
      ------------------------------          ---------------------------

                                        ATTEST:

                                        By: Laura T. Scuff
                                           ------------------------------

                                        Title: Notary Public
                                              ---------------------------

                                       3<PAGE>

                                                                   EXHIBIT 10.24

                     Jiangsu Electronics Industries Limited
                       c/o Koss Audio & Video Electronics
                           11733 Missouri Bottom Road
                           Hazelwood, Missouri 63042

                                 July 31, 2002

Mr. Michael J. Koss
Koss Corporation
4129 North Port Washington Avenue
Milwaukee, Wisconsin 53212

     Re:  Eighth Amendment to License Agreement

Dear Michael:

     Koss Corporation, a Delaware corporation ("Licensor"), and Jiangsu
Electronics Industries Limited, a British Virgin Islands company ("Licensee"),
are (by way of assignment) parties to a certain License Agreement between
Licensor and Trabelco N.V. dated November 15, 1991, as amended (as amended, the
"License Agreement"). Licensor and Licensee now desire to further amend certain
terms and conditions of the License Agreement and agree as follows:

     1.   Section 7.3 of the License Agreement (as amended by the Third
Amendment and Assignment of License Agreement dated as of March 31, 1997, the
Fourth Amendment to License Agreement dated May 29, 1998, the Fifth Amendment
to License Agreement dated March 30, 2001 and the Sixth Amendment to License
Agreement dated August 15, 2001) is hereby deleted in its entirety and the
following inserted in its place:

          7.3  LICENSEE shall pay to LICENSOR the following Minimum Royalties
          for the Contract Years set forth below:

               Year                Minimum Royalties
               ----                -----------------

               2003                $500,000
               2004                $525,000
               2005                $551,250

          If the sum of the total Royalties paid with respect to a Contract Year
          does not equal or exceed the Minimum Royalties for such Contract Year,
          the difference between the Minimum Royalties and the Royalties for
          such Contract Year shall be due and payable on each January 20
          following such Contract Year.

     2.   Section 7.6 of the License Agreement (as amended by the Fifth
Amendment to License Agreement dated March 30, 2001) is hereby deleted in its
entirety and the following inserted in its place:

          7.6  This Agreement shall automatically renew for an additional two
          (2) year period at the end of each Contract Year (unless this
          Agreement is sooner terminated in accordance with the provisions
          hereof). The parties agree that Minimum Royalties shall increase by
          five percent (5%) each Contract Year
<PAGE>
Mr. Michael J. Koss
July 31, 2002
Page 2

          commencing with the Contract Year starting January 1, 2006.

          LICENSEE shall have the right to terminate this Agreement at any time
          by giving written notice to LICENSOR during the course of any
          Contract Year, in which case this Agreement shall continue in full
          force and effect for an additional one (1) Contract Year after
          December 31 of the Contract Year in which the notice of termination
          was given. The Minimum Royalties in effect at the time of the notice
          of termination shall remain constant for the remaining Contract Years
          of this Agreement.

          Commencing with the Contract Year starting January 1, 2005, LICENSOR
          shall have the right to terminate this Agreement during the course of
          any Contract Year if one of the following thresholds is not met with
          regard to Royalties paid by LICENSEE for the periods referenced below:
          (i) LICENSEE's average Royalties from the two (2) most recent Contract
          Years do not exceed one hundred ten percent (110%) of the average
          Minimum Royalties from the same two (2) year period, or (ii)
          LICENSEE's actual Royalties for the most recent Contract Year do not
          exceed seventy percent (70%) of the actual Royalties for the
          immediately preceding Contract Year. In the event of such notice of
          termination by LICENSOR this Agreement shall continue in full force
          and effect for an additional one (1) Contract Year after December 31
          of the Contract Year in which the notice of termination was given. The
          Minimum Royalties in effect at the time of the notice of termination
          shall remain constant for the remaining Contract Years of this
          Agreement.

     3.   The parties hereto agree that this letter agreement has been jointly
drafted by the parties, that the language used in this letter agreement
reflects their mutual intent, and that no term or provision shall be construed
more or less favorably to either party hereto on the grounds that it was
drafted or authorized by such party.

     4.   Except as hereby amended, the License Agreement shall remain in full
force and effect.

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Mr. Michael J. Koss
July 31, 2002
Page 3

     To evidence your agreement with the provisions set forth in this letter,
please execute this letter below.

                                   Very truly yours,

                                   JIANGSU ELECTRONICS INDUSTRIES LIMITED

                                   BY: Poon Ka Hung
                                      ------------------------------------
                                      Name: Poon Ka Hung
                                      Title: Chief Executive Officer

AGREED TO THIS 31 DAY
OF JULY, 2002.

KOSS CORPORATION

By: Michael J. Koss
   --------------------------------
   Michael J. Koss, President

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