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Offered is „HD 820“ by Sennheiser as second-hand device from the category „Wire bound Headphone“ on audio-markt.de - the online market place for high-end. The advert with the number 7935168965 ends on 24.12.2026 at 16:10 o'clock.
The HD 820 is an older 2018-generation model, but its closed-back design remains distinctive rather than superseded in any straightforward way. At €650, this is a strong deal: it sits well below the €749 median and above the €226 lower quartile, making the price notably attractive for a good-condition example.
What makes it worthwhile is the unusually spacious presentation for a closed headphone, with Sennheiser’s 56 mm ring-radiator drivers and glass reflector system delivering detail, scale, and useful isolation. It is a 300-ohm headphone, so budget for a capable headphone amplifier if your source is modest. Check that both original cables—especially the balanced lead—are included, but assuming the listing is complete and genuinely good condition, this is a buying opportunity rather than merely a fair deal.
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.
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