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About this gear
The Koss A/550 is an open-back over-ear headphone from a company that helped invent the stereo headphone category, aimed at home listeners who want an airy, natural soundstage for casual and analytical listening alike. As an open design, it leaks sound and offers no isolation, making it best suited to quiet home environments rather than public use.
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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