About Koss
Koss is an American audio electronics company renowned for pioneering the world's first SP/3 stereophone in 1958, marking a pivotal moment in the history of personal audio. Headquartered in Milwaukee, Wisconsin, Koss has spent over six decades designing and manufacturing high-fidelity headphones and audio accessories. Signature products such as the Porta Pro, Pro/4AA, and KPH40 Utility have earned the brand global acclaim for their comfort, sound quality, and value. Koss continues to innovate, offering a wide range of headphones in both wired and wireless formats, all engineered to deliver exceptional audio performance for music enthusiasts worldwide.