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This US$826 listing for the Sennheiser HDV 820 is a strong bargain, sitting well below the 25th percentile of US$850 and nearly US$440 under the median of US$1,269 based on recent comparable listings. At this price, you are securing a top-tier reference unit for significantly less than typical used market value, making it an excellent buying opportunity for any serious headphone enthusiast.
The HDV 820 is widely revered for its exceptional transparency and power versatility, delivering <0.001% THD while driving everything from sensitive IEMs to high-impedance planars with ease via its balanced XLR and Pentaconn outputs. Its built-in DAC supports PCM up to 32-bit/384kHz and DSD256, offering a complete high-resolution front end without extra boxes. Since the price is a genuine outlier on the low end, the only caveat is verifying the unknown condition details, but if the unit is functional, this is a rare chance to own a flagship-grade amp/dac at a fraction of its original US$2,399 cost.
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.
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