In 1958 John C. Koss invented the World's first SP/3 Stereophone in Milwaukee, Wisconsin and forever changed the way we all listen to music. For over 60 years iconic headphones like the Pro4/AA, HV/1A, ESP6, Porta Pro®, KPH30i and Pro4S were all born in Milwaukee, WI too.
Blog posts
Koss® Reinvents the Iconic Koss® Porta Pro® with the Next Generation Koss Porta Pro Wireless
(Milwaukee, Wisconsin) September 16, 2024 – Koss® Corporation (NASDAQ Symbol: KOSS), the U.S. based high-fidelity Stereophone manufacturer and creator of the world’s first SP3 Stereophone in 1958, ... more
Introducing: Porta Pro Wireless
Introducing: The Next Generation of Porta Pro Porta Pro Wireless The all-new Porta Pro Wireless is our most ambitious Porta Pro ever, packed with innovative technologies that deliver the same leg... more
A Closer Look: Porta Pro Wireless
In 1984 John C. Koss introduced one of the most iconic, innovative and influential headphones ever made, the Koss Porta Pro®. Porta Pro® has defined and influenced personal portable audio for deca... more