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At £65, this Harman Kardon HK 660 is a genuine bargain, sitting well below the typical used market where comparable units fetch roughly £80–£340 (based on $95–$399 eBay sales converted at ~0.73 GBP/USD). Even the lowest recent sale of around $95 translates to approximately £69, meaning this listing is priced at or just under the 25th percentile for the model.
The HK 660 is a respected mid‑class integrated from 1995–1998, delivering 65W per channel into 8Ω with a robust 240‑Watt‑rated main transformer designed for 230V mains—ideal for UK use. It offers six line inputs and A/B speaker switching, plus Harman Kardon’s signature clean, dynamic sound. At this price, it’s a strong buying opportunity for a reliable, well‑built amp, assuming basic power‑on testing confirms no issues; no caveats are needed unless the condition is visibly poor or accessories are missing.
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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