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Offered is „405“ by Quad as second-hand device from the category „Transistor-Poweramp“ on audio-markt.de - the online market place for high-end. The advert with the number 802656437 ends on 24.11.2026 at 13:56 o'clock.
€350 is fair to slightly above the median, sitting just over the €334 midpoint and comfortably within the main used-market band between €267 and €401. It is not a bargain, but it is also not stretched enough to feel ambitious for a clean example.
That makes it a sensible buy if the unit is working properly and hasn’t had a rough life. The 405 is well liked for its sturdy build, straightforward serviceability, and its famously muscular, controlled presentation with the right speakers and preamp. At this price, the upside is in finding one that’s been cared for: original-looking, quiet in operation, and ideally with recent servicing or a clear history.
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.
