Renowned for the invention of the original SP/3 stereophones, Koss has been pioneering hi-fi since 1958 - three generations of American ingenuity, integrity and incomparable quality.

Koss Stereo Headphones Renowned for the invention of the world's first SP/3 Stereophone, Koss has been... See more of Koss on Facebook.

Koss Corporation is an American company that designs and manufactures headphones. Headquartered in Milwaukee, Wisconsin, since 1958, the company invented the first high fidelity stereophones. Koss continues to design and manufacture headphones and audio accessories.

The latest Tweets from Koss (@KossHeadphones). The Original American Stereophone Company #HearingIsBelieving | Customer Support: @kosshelp.

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Amazon's Choice for koss headphones. Koss KPH7 Lightweight Portable Headphone, Black. Koss KTXPRO1 Titanium Portable Headphones with Volume Control, Single, Standard Packaging.

The Koss Porta Pro KTC are decent-sounding and portable on-ear headphones for critical listening The Koss Porta Pro aren't the most versatile headphones. They don't isolate much and leak due to...

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