RADAR is a price search engine. We link to the original listing — we never sell direct. Transactions happen on the source site.
This is a seller’s market for vintage Quad amplifiers, and the £415 asking price for the used Quad 405 is ambitious, sitting clearly above the 75th percentile of £389 from our 20 recent GBP comparable listings. The median in this market is £293, with the 25th percentile at £220, so this price exceeds the typical range by a meaningful margin rather than offering a bargain or fair deal.
Despite the high price, the Quad 405 remains a worthwhile buy because it is legendary for its current-dumping design and plays all music genres with extraordinary beauty, even if bass response is not overwhelming. Its enduring reputation, iconic British sound, and robust build make it a timeless addition for enthusiasts, especially if the listing includes original accessories or is in original-owner condition. However, buyers should verify the absence of common failure points like capacitor aging or board corrosion given the age of these units.
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.
