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Sennheiser hoofdtelefoon 820
There is a critical error in the listing: a Sennheiser HD 820 cannot reasonably be listed for €40, as this is far below the 25th percentile of €805 and even the lowest verified used market ask of €890. Based on your database ground truth, the median used price is €1,066, with recent listings ranging from €805 to €1,109; a €40 ask suggests either a scam, a typo (missing digits), or a non-functional unit with no resale value.
Before assuming a bargain, verify the listing’s legitimacy: confirm the seller’s identity, check for photos of the actual headphones (including the 300Ω impedance ring and glass ear cups), and ensure accessories like the original cable and box are included. The HD 820 is highly regarded for its closed-back clarity, low distortion, and unique glass-enclosed transducers that minimize resonance—making it a rare, top-tier choice for audiophiles who want flagship performance without open-back spill. If the price is truly €40 and the unit is functional, it would be an unprecedented steal, but treat it as a red flag until verified.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Founded in June 1945 by Dr. Fritz Sennheiser in a farmhouse near Hanover, Germany, Sennheiser began as Laboratorium Wennebostel, producing voltmeters and early microphones amid post-World War II reconstruction. Seven engineers from the University of Hannover joined the founder, quickly pivoting to broadcast microphones like the DM 2 in 1946 and the groundbreaking MD 82 shotgun mic in 1956. Renamed Sennheiser electronic in 1958, the family-owned company passed to second- and third-generation leadership, maintaining its innovative spirit over eight decades.
Sennheiser excels in professional and consumer audio, renowned for microphones, wireless systems, and headphones that set industry standards. Pioneers of the first open-back headphones (HD 414 in 1968) and enduring studio icons like the MD 421 and MD 441, they also produce high-end headphones, earbuds, soundbars, and conferencing solutions. While strong in pro audio like mixers and geophysical gear, their consumer focus centers on headphones and wireless tech rather than amplifiers, speakers, turntables, DACs, or cables.
Sennheiser commands a premium position in the hi-fi market, blending mid-tier accessibility with high-end excellence for discerning buyers and professionals. Trusted for reliability and sonic precision, it appeals to audiophiles seeking reference-grade headphones without boutique obscurity, backed by a heritage of technological firsts that sustains its global leadership.
See all Sennheiser listings on RADAR.
