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Headphones
Buy the headphone that invented the category — Milwaukee-built classics with a lifetime warranty.
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about koss
Koss is a US-native heritage headphone maker founded in Milwaukee, Wisconsin, in 1958. John C. Koss and engineer Martin Lange built the SP-3, generally credited as the first stereo headphone marketed to consumers, and the company has stayed a headphone specialist ever since rather than expanding into broad electronics. The catalog people actually argue about is the budget-audiophile tier: the Porta Pro (an on-ear design essentially unchanged since 1984), the clip-on KSC75, and the KPH30i. These are inexpensive open-back dynamics that punch far above their price and carry deep coverage in the headphone press — Head-Fi, Headfonia, and the wider review community treat the Porta Pro as a reference point for what cheap can sound like. Many Koss models ship with the company's limited lifetime warranty, a long-standing differentiator. Market position is mass-market and value-tier rather than high-end two-channel — Koss competes with Sennheiser's entry models, Grado's lower SR line, and the broad sub-$100 headphone field, not with statement audiophile cans. It sells direct via koss.com and through US retailers including Audio46. One note for show-floor context: the HIGH END Vienna exhibitor listing places Koss under in-akustik GmbH & Co. KG, which reflects European distribution, not the US channel. Products trace to the company's Milwaukee base.