RADAR is a price search engine. We link to the original listing — we never sell direct. Transactions happen on the source site.
This is a serious vintage monoblock with a good rep, and US$500 for the pair looks fair to mildly strong rather than cheap. The original price was about US$425 per amp, so a working used pair at this level sits in the sensible zone for a collectible, high-current HK set rather than screaming bargain territory.
What makes it worth a look is the HK 775’s reputation for solid power, punchy control, and that classic late-’70s/early-’80s Harman Kardon build that still appeals to vintage fans. If the listing is complete and tidy, the upside is in originality and cosmetic condition; I’d want confirmation that both monos are healthy, quiet, and unmodified, since age-related service history matters more here than cosmetic polish.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Harman Kardon traces its origins to 1953, when Dr. Sidney Harman and Bernard Kardon, both engineers frustrated with conservative audio manufacturing at the David Bogen Company, invested $5,000 each to launch their venture in Westbury, New York. Their debut product, the Festival D1000, became the world's first compact AM/FM hi-fi receiver, blending breakthrough technology with sleek design to make high-fidelity sound accessible beyond technical enthusiasts. Pioneering innovations like the 1958 Festival TA230 stereo receiver, the 1959 Citation II ultra-wide bandwidth tube amplifier, and the 1970 CAD5 hi-fi cassette recorder with Dolby noise reduction cemented their legacy in simplifying premium audio for the home.
The brand focuses on integrated receivers, amplifiers, tuners, and speakers that emphasize performance, reliability, and elegant industrial design. Over decades, it expanded into home theater systems and automotive audio, powering systems in vehicles from Land Rover and BMW to Volvo and Polestar. While not delving into turntables, DACs, headphones, or cables, Harman Kardon prioritizes cohesive hi-fi components that deliver warm, detailed sound without unnecessary complexity.
Harman Kardon holds a solid mid-tier position in the hi-fi market, renowned among knowledgeable buyers for its enduring quality and value rather than ultra-high-end exotica or vintage collector status. Now part of Harman International, it appeals to discerning listeners seeking dependable, stylish gear that echoes its innovative heritage without commanding boutique premiums.
See all Harman Kardon listings on RADAR.
