Renowned for the invention of the World’s First SP/3 Stereophone, Koss has been pioneering hi-fi since 1958 - three generations of American ingenuity, integrity and incomparable quality.
Who Invented the Stereo Headphone?
Blog posts
"The Porta Pro headphones have an undeniable charm..." - Rolling Stone
Jonathan Zavaleta recently interviewed Shelby Hull, founder of WiredItGirls to talk about wired headphones writing "The Porta Pro headphones have an undeniable charm" - Jonathan Zavaleta (Rolling S... more
Headphone School: The World's First Koss SP/3 Stereophone That Started It All
In 1958, John C. Koss invented personal listening with the world’s first SP/3 Stereophone. Koss sought to replicate the excitement of a live musical performance and teamed up with engineer Martin L... more
Introducing: Koss Official Standard and Oversized Colored Cushions for Porta Pro
Looking to give your Koss Porta Pro® a fresh new look? Now you can personalize your favorite headphones with official Koss Standard and Oversized Cushions, designed for comfort, style, and the perf... more