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Koss Corporation

Company type	Public
Traded as	Nasdaq: KOSS
Industry	Electronics
Founded	1953; 71 years ago (1953)
Headquarters	Milwaukee, Wisconsin
Area served	Worldwide
Number of employees	31^[1] (2023)
Website	koss.com

Koss Porta Pro headphones

Koss Pro/4AA headphones

Koss Corporation is a company in Milwaukee, Wisconsin, US that manufactures headphones. The company introduced the first high fidelity stereophones.^[2]

^ "SEC Filing | Koss Corporation". investors.koss.com. June 20, 2023.
^ "The History of Headphones | Cool Material". coolmaterial.com. Retrieved 2015-09-10.