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Against a modern AV receiver at this level, the smarter buy is usually a better-kept vintage stereo piece — and at £157, this sits a bit above the £115 median and above the £176 75th percentile only if condition is especially clean, so here it reads slightly ambitious rather than a clear bargain. With no condition details, I’d treat it as fair only if it’s fully working, cosmetically tidy, and ideally comes with the original remote; otherwise, the price feels a touch rich for a 670.
That said, the HK 670 is a well-regarded late-’70s/early-’80s Harman/Kardon with a strong, punchy presentation and enough drive to make efficient speakers sound lively and composed. It’s a worthwhile buy when serviced and complete, but age-related issues — scratchy controls, tired lamps, and drift in the tuner or phono stage — are the things that matter most here, so at this price I’d want clear proof of health before jumping.
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.
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