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Is this the sort of classic Quad piece you’ve been waiting for, and does the price leave enough room for any servicing you might want later? At £250, it sits a touch under the £275 median and comfortably below the £340 75th percentile, so this reads as a fair-to-good buy rather than a stretch. For a well-kept example, that’s the right zone to be in.
The appeal here is the Quad 405’s reputation for smooth, unfussy power and its long-lived, studio-to-sitting-room pedigree. It’s a sensible amplifier to buy used if you want solid, musical performance without chasing fashion, and a decent example can still be very satisfying. The main question is condition: with no details given, a clean, serviced unit is the sweet spot, while tired capacitors or channel imbalance would be the only real reasons to slow down.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Quad, the venerable British hi-fi brand, traces its origins to 1936 in London, when engineer Peter J. Walker founded S.P. Fidelity Sound Systems, soon renamed the Acoustical Manufacturing Company. Relocating to Huntingdon in 1941 after wartime bombing, the firm shifted from public address gear to domestic audio amid post-war demand for superior sound reproduction. Walker's pioneering ethos—prioritizing "the closest approach to the original sound"—defined Quad from its early QA12 amplifiers, adopted by the BBC, to the iconic Quad I of 1953.
The brand excels in amplifiers and electrostatic loudspeakers, revolutionizing both categories. The Quad II power amplifier of 1953 introduced cathode coupling for vanishingly low distortion, while the 1956 ESL 57 delivered the world's first full-range electrostatic speaker, employing a massless film diaphragm for unparalleled transparency and transient speed. Quad advanced into solid-state with the 1967 303 and transistor designs featuring innovative "Triples" output stages, later expanding to integrated amps like the 99 series, moving-coil speakers, and modern electrostatic models such as the ESL 988 and 989.
Today, under the International Audio Group since 1997, Quad holds a prestigious position in the high-end market, revered by audiophiles for its unyielding pursuit of accuracy over trends. Its heritage components command vintage collector status, yet contemporary offerings maintain a niche boutique appeal among discerning buyers seeking refined, distortion-free reproduction that honors Walker's legacy.
See all Quad listings on RADAR.
