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New, this was a roughly £140 amplifier; at £84, this example is above the £60 median for 34 recent comparable listings and clearly above the £71 75th percentile. That makes the asking price ambitious, especially with the condition marked unknown. It would need to be exceptionally clean, tested, or unusually well-presented to justify the premium.
The PMA-255UK remains an appealingly straightforward Denon: conservative 30-watt-per-channel output, punchy bass, good load handling, four line inputs, and a lively, capable sound that can drive sensible bookshelf speakers convincingly. It has no phono stage, so turntable users need an external phono preamp. At this money, insist on a demonstration of both channels, quiet controls and inputs, working headphone output, and sound speaker terminals; otherwise, negotiating toward £60–£70 would be sensible.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Denon traces its origins to 1910, when American entrepreneur Frederick Whitney Horn founded Japan's first audio equipment company, Nipponophone, initially focused on gramophones and records. The Denon brand emerged in 1939 from the merger of Japan Denki Onkyo—combining "den" for electricity and "on" for sound—with other entities, marking a shift toward professional audio development. This heritage includes pioneering Japan's first professional disc recorder in 1945, used to capture Emperor Hirohito's voice, and launching the nation's first long-playing records in 1951.
The brand excels across a broad spectrum of hi-fi categories, from amplifiers, turntables, and tuners to loudspeakers, cassette decks, and phono cartridges. Denon's innovations extend to digital frontiers, such as the world's first practical PCM recorder in the early 1970s, the inaugural CD player in 1981, and early home theater systems with Dolby Digital in 1995. Today, its lineup encompasses AV receivers, headphones, wireless streaming solutions like HEOS, and high-channel processors, blending professional-grade components with consumer accessibility.
Denon holds a commanding position as a mid-to-high-end mainstay in the hi-fi market, revered for its blend of technological firsts, robust build quality, and balanced sound signatures that appeal to discerning enthusiasts. No longer a vintage collector's niche, it competes confidently against premium rivals, backed by over a century of audio leadership and strategic partnerships like its merger with Marantz.
See all Denon listings on RADAR.
