-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 U4vQALsTPT8JawkZF/3yfI1eEpcRdVqNwBpZfht3jWcI2g7rCnawA/5pXi+MUjGf
 zk4PA8UOHedBIRZvKJ8GYg==

<SEC-DOCUMENT>0001181431-03-009093.txt : 20030528
<SEC-HEADER>0001181431-03-009093.hdr.sgml : 20030528
<ACCEPTANCE-DATETIME>20030528121035
ACCESSION NUMBER:		0001181431-03-009093
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20030523
FILED AS OF DATE:		20030528

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			KOSS CORP
		CENTRAL INDEX KEY:			0000056701
		STANDARD INDUSTRIAL CLASSIFICATION:	HOUSEHOLD AUDIO & VIDEO EQUIPMENT [3651]
		IRS NUMBER:				391168275
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0630

	BUSINESS ADDRESS:	
		STREET 1:		4129 N PORT WASHINGTON AVE
		CITY:			MILWAUKEE
		STATE:			WI
		ZIP:			53212
		BUSINESS PHONE:		4149645000

	MAIL ADDRESS:	
		STREET 1:		C/O WHYTE HIRSCHBOECK DUDEK S C
		STREET 2:		111 EAST WISCONSIN AVENUE
		CITY:			MILWAUKEE
		STATE:			WI
		ZIP:			53202

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	KOSS ELECTRONICS INC
		DATE OF NAME CHANGE:	19721005

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	REK O KUT CO INC
		DATE OF NAME CHANGE:	19680124

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			LILLIE LENORE
		CENTRAL INDEX KEY:			0001216781

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-03295
		FILM NUMBER:		03721064

	BUSINESS ADDRESS:	
		STREET 1:		4129 NORTH PORT WASHINGTON AVENUE
		CITY:			MILWAUKEE
		STATE:			WI
		ZIP:			53212
		BUSINESS PHONE:		4149645000

	MAIL ADDRESS:	
		STREET 1:		4129 NORTH PORT WASHINGTON AVENUE
		CITY:			MILWAUKEE
		STATE:			WI
		ZIP:			53212
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>rrd9851.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>
    <schemaVersion>X0101</schemaVersion>

    <documentType>4</documentType>
<periodOfReport>2003-05-23</periodOfReport>
<notSubjectToSection16>0</notSubjectToSection16>
    <issuer>
        <issuerCik>0000056701</issuerCik>
        <issuerName>KOSS CORP</issuerName>
        <issuerTradingSymbol>KOSS</issuerTradingSymbol></issuer>
<reportingOwner>
<reportingOwnerId>
            <rptOwnerCik>0001216781</rptOwnerCik>
            <rptOwnerName>LILLIE LENORE</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>  </rptOwnerStreet1>
            <rptOwnerStreet2>  </rptOwnerStreet2>
            <rptOwnerCity>  </rptOwnerCity>
            <rptOwnerState>  </rptOwnerState>
            <rptOwnerZipCode>  </rptOwnerZipCode>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
<isDirector>0</isDirector>
<isOfficer>1</isOfficer>
<isTenPercentOwner>0</isTenPercentOwner>
<isOther>0</isOther>
<officerTitle>VP - Operations</officerTitle>
<otherText></otherText></reportingOwnerRelationship></reportingOwner>
<nonDerivativeSecurity>
<securityTitle>
<value>Common Stock</value></securityTitle>
<transactionDate>
<value>2003-05-23</value></transactionDate>
<transactionCoding>
<transactionFormType>4</transactionFormType>
<transactionCode>M</transactionCode>
<equitySwapInvolved>0</equitySwapInvolved></transactionCoding>
<transactionTimeliness>
<value></value></transactionTimeliness>
<transactionAmounts>
<transactionShares>
<value>2500</value></transactionShares>
<transactionValue>
<value>5.375</value></transactionValue>
<transactionAcquiredDisposedCode>
<value>A</value></transactionAcquiredDisposedCode></transactionAmounts>
<postTransactionAmounts>
<sharesOwnedFollowingTransaction>
<value>7500</value></sharesOwnedFollowingTransaction></postTransactionAmounts>
<ownershipNature>
<directOrIndirectOwnership>
<value>D</value></directOrIndirectOwnership>
<natureOfOwnership>
<value></value></natureOfOwnership></ownershipNature></nonDerivativeSecurity>
<nonDerivativeSecurity>
<securityTitle>
<value>Common Stock</value></securityTitle>
<transactionDate>
<value>2003-05-23</value></transactionDate>
<transactionCoding>
<transactionFormType>4</transactionFormType>
<transactionCode>M</transactionCode>
<equitySwapInvolved>0</equitySwapInvolved></transactionCoding>
<transactionTimeliness>
<value></value></transactionTimeliness>
<transactionAmounts>
<transactionShares>
<value>2500</value></transactionShares>
<transactionValue>
<value>6.725</value></transactionValue>
<transactionAcquiredDisposedCode>
<value>A</value></transactionAcquiredDisposedCode></transactionAmounts>
<postTransactionAmounts>
<sharesOwnedFollowingTransaction>
<value>10000</value>
<footnoteId id="F1"/></sharesOwnedFollowingTransaction></postTransactionAmounts>
<ownershipNature>
<directOrIndirectOwnership>
<value>D</value></directOrIndirectOwnership>
<natureOfOwnership>
<value></value></natureOfOwnership></ownershipNature></nonDerivativeSecurity>
<derivativeSecurity>
<securityTitle>
<value>Stock Option</value></securityTitle>
<conversionOrExercisePrice>
<value>5.375</value></conversionOrExercisePrice>
<transactionDate>
<value>2003-05-23</value></transactionDate>
<transactionCoding>
<transactionFormType>4</transactionFormType>
<transactionCode>M</transactionCode>
<equitySwapInvolved>0</equitySwapInvolved></transactionCoding>
<transactionAmounts>
<transactionShares>
<value>2500</value></transactionShares>
<transactionValue>
<value>0</value>
<footnoteId id="F3"/></transactionValue>
<transactionAcquiredDisposedCode>
<value>D</value></transactionAcquiredDisposedCode></transactionAmounts>
<exerciseDate>
<value>2000-04-29</value>
<footnoteId id="F2"/></exerciseDate>
<expirationDate>
<value>2009-04-29</value></expirationDate>
<underlyingSecurity>
<underlyingSecurityTitle>
<value>Common Stock</value></underlyingSecurityTitle>
<underlyingSecurityShares>
<value>2500</value></underlyingSecurityShares></underlyingSecurity>
<postTransactionAmounts>
<sharesOwnedFollowingTransaction>
<value>0</value></sharesOwnedFollowingTransaction></postTransactionAmounts>
<ownershipNature>
<directOrIndirectOwnership>
<value>D</value></directOrIndirectOwnership>
<natureOfOwnership>
<value></value></natureOfOwnership></ownershipNature></derivativeSecurity>
<derivativeSecurity>
<securityTitle>
<value>Stock Option</value></securityTitle>
<conversionOrExercisePrice>
<value>6.725</value></conversionOrExercisePrice>
<transactionDate>
<value>2003-05-23</value></transactionDate>
<transactionCoding>
<transactionFormType>4</transactionFormType>
<transactionCode>M</transactionCode>
<equitySwapInvolved>0</equitySwapInvolved></transactionCoding>
<transactionAmounts>
<transactionShares>
<value>2500</value></transactionShares>
<transactionValue>
<value>0</value>
<footnoteId id="F3"/></transactionValue>
<transactionAcquiredDisposedCode>
<value>D</value></transactionAcquiredDisposedCode></transactionAmounts>
<exerciseDate>
<value>2001-05-01</value>
<footnoteId id="F4"/></exerciseDate>
<expirationDate>
<value>2010-05-01</value></expirationDate>
<underlyingSecurity>
<underlyingSecurityTitle>
<value>Common Stock</value></underlyingSecurityTitle>
<underlyingSecurityShares>
<value>2500</value></underlyingSecurityShares></underlyingSecurity>
<postTransactionAmounts>
<sharesOwnedFollowingTransaction>
<value>2500</value></sharesOwnedFollowingTransaction></postTransactionAmounts>
<ownershipNature>
<directOrIndirectOwnership>
<value>D</value></directOrIndirectOwnership>
<natureOfOwnership>
<value></value></natureOfOwnership></ownershipNature></derivativeSecurity>
<footnotes>
<footnote id="F1">The reporting person indirectly owns 12,958 shares of common stock of the Issuer through the Koss Employee Stock Ownership Trust</footnote>
<footnote id="F2">This option vests in four equal installments, with the first installment being 4/29/2000.</footnote>
<footnote id="F3">Option grant.</footnote>
<footnote id="F4">This option vests in four equal installments, with the first installment being 5/1/2001</footnote></footnotes>
<ownerSignature>
<signatureName>Lenore Lillie</signatureName>
<signatureDate>2003-05-28</signatureDate></ownerSignature></ownershipDocument>


</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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