Expired
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If you’re cross-shopping it against a modern integrated or a chunkier power amp, £350 is a touch above the £278 median for recent UK comparables and sits just over the £347 75th percentile, so this is a bit ambitious rather than a steal. It’s not wildly out of line, but it’s priced at the top end of the current used spread, so I’d want evidence the unit is tidy, original, and fully functional before paying up.
The appeal here is straightforward: the 306 is a well-liked, no-nonsense power amp with a strong reputation for grip, drive, and musical timing, especially in a good system with sympathetic speakers. If it’s been cared for and hasn’t needed recent repairs, it can still be a very satisfying buy; the main upside is getting a respected classic without chasing rarer variants. At this price, though, a clean service history and sensible cosmetic condition matter.
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.
