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Quad 909 Mono Pair Power Amplifier I'm looking for a Quad 909 mono block pair. I think a set was floating around a couple of years ago. If you have a working set in good condition to sell, let me know. Thanks Condition: Unspecified Payment Method: Region/State: (WA) Western Australia/Australia By jonlad1 0 Comments AUD $1,700 Date: October 3, 20241 yr
At A$1,700, this sits roughly in the fair-to-slightly-strong range for a used Quad 909 Mono in good condition, especially since comparable used 909 monoblocks have been seen around A$1,750 with boxes and clean presentation, while a used stereo 909 is listed at A$1,980. It’s not an obvious bargain, but it’s also not a stretch if the pair is genuinely tidy and fully working.
The attraction here is the 909’s reputation for musical, controlled power and easy partnering with real-world speakers; Quad gear tends to keep a loyal following, so a clean example has decent buyer appeal. If it comes with original boxes, a known service history, or matching pair details, that adds real value; if not, I’d mainly just verify quiet operation and that both channels are equally healthy.
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.
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