Hearing is Believing®

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BT190i
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Porta Pro®
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BT540i
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SP540
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  • The Original American Stereophone Company

    Ever since I invented the world's first SP/3 Stereophone back in 1958, Koss Stereophones have been bringing back the excitement of a live performance. Music lovers around the world recognize that dedication to accuracy in sound reproduction as: The Sound of Koss®

    John C. Koss, Founder
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