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These koss fitbuds earbuds fit discreetly in your ears and they’re a mere 6mm in diameter, making them 33% smaller than average-sized koss earbuds. They feature a dual-injected, soft-rubberized housin
Condition is unknown, so €150 is harder to justify than it would be for a clearly complete, tested pair; against the recent used market median of €35 and even the 75th percentile of €131, this sits above the usual range and reads as ambitious. Unless there’s something unusually compelling included, the price is not in bargain territory.
That said, these are lightweight, sweat-resistant earbuds with a decent reputation for easy everyday use and workout duty, so the appeal is practical rather than collectible. If the set is clean, fully working, and includes the right tips or packaging, there’s still value here for someone who specifically wants a ready-to-use pair—but at this ask, the buyer should want proof of condition and completeness.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Koss Corporation traces its roots to 1953 in Milwaukee, Wisconsin, where founder John C. Koss launched the J.C. Koss Hospital Television Rental Company with just $200, repairing and renting TVs to patients. The pivotal shift came in 1958 when Koss, partnering with engineer Martin Lange Jr., invented the world's first high-fidelity stereo headphones—the SP/3 stereophone—as part of a portable phonograph. This breakthrough birthed personal stereo listening, catapulting the brand from a modest TV rental outfit to an audio pioneer with deep Midwestern heritage.
Koss specializes in headphones, from its iconic full-size Pro/4AA professional models introduced in 1970 to the enduring Porta Pro portable headphones launched in 1984, which blended superior sound, comfort, and lightweight design. While not venturing into amplifiers, speakers, turntables, DACs, or cables, the brand has consistently focused on dynamic, noise-isolating headphones that prioritize musical fidelity over fleeting trends.
Renowned for its vintage appeal and collector status among hi-fi enthusiasts, Koss occupies a niche mid-tier position, emphasizing timeless engineering and value-driven performance rather than high-end luxury or mass-market flash. Its family-owned structure—controlled by the Koss family—and Milwaukee roots underscore a commitment to authentic audio heritage, sustaining loyalty in a market dominated by coastal giants.
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