1 Dear Stockholder: We are very pleased to announce results for the fiscal year ending June 30, 2001. Sales for the fourth quarter ending June 30, 2001 were up 5% to $10,186,107 compared with $9,745,408 for the same period one year ago. Income from operations for the quarter increased 23% and reached $2,521,133 compared with $2,051,156 for the fourth quarter of 2000. Net income increased 11% to $1,692,877 compared with $1,527,987 for the same three month period last year. Fourth quarter diluted earnings per share increased by 31% to $0.81 compared with $0.62 for the fourth quarter of fiscal year 2000. Year-to-date sales for the 12 months ending June 30, 2001 increased by 9% to $38,609,335 compared with $35,401,533 for the fiscal year 2000. Income from operations for the 12 months increased by 23% to $8,126,089 from $6,611,003. Year-to-date income for the 12 months increased by 15% reaching a company high of $5,687,521 compared with $4,953,461 for the 12 months ending June 30, 2000. Diluted earnings per share were $2.56, an increase of 35% over the previous fiscal year record of $1.90. The final quarter for the fiscal year was exceptional. Throughout the year we had been anticipating a lower fourth quarter compared with 2000 and instead we are pleased to report a solid increase in sales and earnings. This is simply our best year of stereophone sales in the history of the Company and has produced a record in terms of our profitability. The Company had been most successful through the year in its growth of the base stereophone business at retail, despite setbacks in the OEM and automotive segments of the business. Our Sales team was consistently challenged to perform this year by meeting and exceeding progress we made last year in areas outside our consumer retail business. The Company's ability to make up for slumps in the OEM sectors through increases in our sales to the retail channel helped post solid gains for the year and led us to new records in terms of our profitability and earnings. In addition, income from operations had shown more solid and consistent growth than net income based upon inconsistencies in royalty income through the year. Renewal of the license agreement with Orient Power has now been extended for an additional 12 months. Koss remains committed to its core Stereophone business and improvements in new product development and placement in both current and new accounts will continue to positively impact fiscal year 2002. The Company will continue to use cash to buy its undervalued shares from the market. We are also pleased to announce that following the First Quarter of this fiscal year, the Company will pay a $0.25 dividend to shareholders of record on September 30, 2001. This is the first time Koss has paid a dividend to shareholders since 1984. While the Company anticipates the ability to pay a quarterly dividend in the future, investors should be cautious not to expect this to automatically continue or to see any annual increase in the quarterly rates in the foreseeable future. We would like to take this opportunity to thank our customers, suppliers, stockholders as well as the entire Koss team for their dedication to the current and future success of Koss Corporation. Sincerely, John C. Koss Michael J. Koss Chairman President and CEO

2 STOCKHOLDERS' INFORMATION Koss Corporation's 2001 Annual Report is presented in a simple, readable and functional style. This Annual Report contains condensed financial statements only. The detailed financial statements including footnotes are included in the Form 10-K which has been provided to all stockholders along with the 2001 Annual Report. The Company believes this manner of presentation provides a concise summary for those who want to be kept informed while at the same time allowing those who feel it necessary the opportunity to investigate further. Koss Corporation common stock is traded on the Over the Counter market and quotations are available through the National Market System. The trading symbol is KOSS. For additional Annual Reports, Form 10-K's or Proxy materials write to: Investment Relations Koss Corporation 4129 N. Port Washington Ave. Milwaukee, WI 53212 - ------------------------------------------------------------------------ REPORT OF INDEPENDENT ACCOUNTANTS To the Board of Directors and Stockholders of Koss Corporation We have audited, in accordance with auditing standards generally accepted in the United States of America, the consolidated balance sheets of Koss Corporation and its subsidiaries as of June 30, 2001 and 2000, and the related consolidated statements of income, of stockholders' investment and of cash flows for each of the three years in the period ended June 30, 2001 (not presented herein); and in our report dated July 10, 2001, except for Note 12 (not presented herein) for which the date is July 25, 2001, we expressed an unqualified opinion on those consolidated financial statements. In our opinion, the information set forth in the accompanying condensed consolidated financial statements is fairly stated, in all material respects, in relation to the consolidated financial statements from which it has been derived. PricewaterhouseCoopers LLP Milwaukee, Wisconsin July 10, 2001, except for Note 12 (not presented herein) for which the date is July 25, 2001

3 CONSOLIDATED STATEMENTS OF INCOME Year Ended June 30, 2001 2000 1999 - ------------------------------------------------------------------------------------------------------------- Net sales $38,609,335 $35,401,533 $33,776,039 Cost of goods sold 23,037,127 21,843,517 20,920,145 - ------------------------------------------------------------------------------------------------------------- Gross profit 15,572,208 13,558,016 12,855,894 Selling, general, and administrative expense 7,446,119 6,947,013 7,225,340 - ------------------------------------------------------------------------------------------------------------- Income from operations 8,126,089 6,611,003 5,630,554 Other income (expense) Royalty income 1,010,026 1,283,563 1,403,194 Interest income 85,423 102,139 33,373 Interest expense (15,465) (24,244) (67,932) - ------------------------------------------------------------------------------------------------------------- Income before income taxes 9,206,073 7,972,461 6,999,189 Provision for income taxes 3,518,552 3,019,000 2,681,000 - ------------------------------------------------------------------------------------------------------------- Net income $ 5,687,521 $ 4,953,461 $ 4,318,189 ============================================================================================================= Earnings per common share: Basic $2.70 $1.95 $1.41 Diluted $2.56 $1.90 $1.39 ============================================================================================================= Dividends per common share None None None =============================================================================================================

4 CONSOLIDATED BALANCE SHEETS - ---------------------------------------------------------------------------------------------------------------------------- As of June 30, 2001 2000 - ---------------------------------------------------------------------------------------------------------------------------- ASSETS Current Assets: Cash: $ 181,678 $ 3,164,401 Accounts receivable, less allowances of $301,252 and $252,194, respectively 8,247,045 8,228,185 Inventories 8,496,010 9,414,036 Prepaid expenses 593,961 562,028 Income taxes receivable 480,322 244,755 Deferred income taxes 340,973 638,973 - ---------------------------------------------------------------------------------------------------------------------------- Total current assets 18,339,989 22,252,378 - ---------------------------------------------------------------------------------------------------------------------------- Equipment and Leasehold improvements, at cost: Leasehold improvements 1,031,574 852,096 Machinery, equipment, furniture, and fixtures 5,012,089 4,910,652 Tools, dies, molds, and patterns 9,062,776 8,689,732 - ---------------------------------------------------------------------------------------------------------------------------- 15,106,439 14,452,480 Less--accumulated depreciation 13,415,811 12,888,178 - ---------------------------------------------------------------------------------------------------------------------------- 1,690,628 1,564,302 Deferred Income Taxes 557,135 488,135 Other Assets 908,576 739,492 - ---------------------------------------------------------------------------------------------------------------------------- $ 21,496,328 $25,044,307 ============================================================================================================================ LIABILITIES AND STOCKHOLDERS' INVESTMENT Current Liabilities: Accounts payable $ 2,062,476 $ 570,567 Accrued liabilities 1,551,679 1,007,443 - ---------------------------------------------------------------------------------------------------------------------------- Total current liabilities 3,614,155 1,578,010 - ---------------------------------------------------------------------------------------------------------------------------- Contingently Redeemable Equity Interest 1,490,000 1,490,000 Deferred Compensation 1,015,390 1,045,310 Other Liabilities 437,354 437,354 Commitments and Contingencies - ---------------------------------------------------------------------------------------------------------------------------- Stockholders' Investment: Common stock, $.01 par value, authorized 8,500,000 shares; issued and outstanding 1,943,378 and 2,349,369 shares, respectively 19,434 23,494 Contingently redeemable common stock (1,490,000) (1,490,000) Undistributed retained earnings 16,409,995 21,960,139 - ---------------------------------------------------------------------------------------------------------------------------- Total stockholders' investment 14,939,429 20,493,633 - ---------------------------------------------------------------------------------------------------------------------------- $21,496,328 $25,044,307 ============================================================================================================================

5 MANAGEMENT INFORMATION OFFICERS AND DIRECTORS SENIOR MANAGEMENT John C. Koss John C. Koss Chairman of the Board Chairman of the Board Koss Corporation Michael J. Koss Vice Chairman President Thomas L. Doerr Chief Executive Officer President Chief Operating Officer Doerr Corporation Chief Financial Officer Victor L. Hunter John C. Koss, Jr. President Vice President-Sales Hunter Business Group, LLC Sujata Sachdeva Michael J. Koss Vice President- Finance Vice Chairman, President, C.E.O., C.O.O., C.F.O. Koss Corporation Jill McCurdy Vice President-Product Development Lawrence S. Mattson Retired President Lenore Lillie Oster Company Vice President-Operations Martin F. Stein Cheryl Mike Chairman Vice President-Human Resources/Customer Relations Eyecare One Inc. Declan Hanley John J. Stollenwerk Vice President-International Sales President Allen-Edmonds Shoe Corporation ANNUAL MEETING October 18, 2001 INDEPENDENT ACCOUNTANTS Performance Center Koss Corporation PricewaterhouseCoopers LLP 4129 N. Port Washington Avenue Milwaukee, Wisconsin Milwaukee, WI 53212 TRANSFER AGENT LEGAL COUNSEL Questions regarding change of address, Richard W. Silverthorn stock transfer, lost certificate, or General Counsel information on a particular account Whyte Hirschboeck Dudek S.C. should be directed in writing to: Firstar Trust Company Box 2077 Milwaukee, WI 53201 Attn: Mr. Philip Meyer