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Compared with the usual vintage integrated-amplifier alternatives around this money, USD 180 is a strong deal. Your comparable listings put the PM660’s 25th percentile at USD 192 and median at USD 205, so this sits below even the lower quartile—excellent value if it is working properly.
The PM660 is a particularly capable buy: a muscular 80-watt-per-channel design with a well-regarded phono stage, MM/MC flexibility, and a Main Direct mode that bypasses much of the control circuitry for a clean signal path. It also has the substantial build and current delivery that make older Harman Kardon amplifiers attractive with demanding speakers. Because the listing gives no condition detail, confirm both channels, speaker outputs, phono operation, switches, and heat behavior; age-related lamps or noisy controls are manageable, but a channel fault changes the bargain calculus.
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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