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At £100, this sits above your recent comparable market: the median is £74, with the 75th percentile at £84, so the asking price is a bit ambitious for a standard used example. It is not wildly out of line, but it is clearly priced above the usual spread, so I’d only lean in if the condition is notably better than average or it comes with something extra.
The KA-550 is a solid vintage integrated: straightforward, capable, and generally appealing to buyers who want a clean, no-fuss amp with decent drive and a classic Kenwood build. At this level, the upside comes from finding one that has been well cared for, still sounds quiet and stable, and maybe has original packaging or a known service history. If it’s truly untouched and unserviced, just factor in age-related maintenance; at £100, you want confidence in its working order.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Kenwood traces its origins to December 21, 1946, when it was founded as Kasuga Radio Co. Ltd. in Komagane City, Nagano Prefecture, Japan, by a group of entrepreneurs led by William "Bill" Kasuga. Emerging in the postwar era, the company initially produced electronic components and amateur radio gear, renaming to Trio Corporation in 1960 before adopting the Kenwood name in 1986 to appeal to Western markets—blending "Ken," a familiar name across Japan and America, with "Wood" evoking durability and Hollywood. This rebranding fueled rapid international growth, starting with a U.S. office in Los Angeles County in 1963.
The brand built its legacy on high-quality audio and communications equipment, excelling in home hi-fi amplifiers like the acclaimed 1970 Supreme 1 multichannel model, receivers, tuners, and speakers with innovations such as polypropylene cones. Kenwood also pioneered car audio systems, including the first audio/video amplifier for home theater in 1981 and anti-theft cassette decks, alongside professional two-way radios and amateur transceivers. While maintaining roots in consumer electronics, it expanded into automotive infotainment.
Today, as part of JVCKENWOOD since the 2008 merger with JVC, Kenwood holds a solid mid-tier position in car audio and professional communications, prized by enthusiasts for reliable performance and aftermarket upgrades. Its vintage home hi-fi gear from the 1970s and 1980s commands respect among collectors for robust build and warm sound, though it no longer dominates pure hi-fi markets.
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