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About this gear
The Pro4X modernizes Koss's Pro line with contemporary materials and engineering, maintaining the closed-back design philosophy while updating the sound character for current listeners. At $150 USD, it positions itself as an accessible professional or enthusiast-level option in Koss's current lineup.
About Koss
American headphone pioneer founded in 1958 by John C. Koss in Milwaukee — credited with inventing the first stereo headphone (the SP/3). Koss's Porta Pro, introduced in 1984, remains in production and is one of the most beloved headphones ever made, offering remarkable sound quality and musicality a...
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