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This is an ambitious ask: at US$900, it sits well above the recent used market median of US$230 and even above the US$379 75th percentile, so it is priced at a premium that only makes sense if the condition, provenance, and upgrade package are exceptional.
That said, the Accession MM is a respected phono stage, and the upgraded power supply is the kind of add-on that can matter for noise floor, drive, and overall refinement. If it’s truly clean, complete, and from a careful owner, the package has real appeal—but at this level I’d want strong photos, confirmation that the Enigma supply is included, and some justification for why this example deserves a price far beyond normal used comps.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Graham Slee Projects, founded in 1998 in the UK by engineer Graham Slee, traces its roots to his extensive career beginning in 1974. Starting in audiovisual engineering, he advanced through printed circuit design, electronics manufacturing, and broadcast audio, serving as a senior engineer for BBC studio contractors before freelancing in hi-fi. This deep expertise laid the foundation for a brand dedicated to precision audio electronics, all handmade in British workshops.
The company specializes in phono preamplifiers and headphone amplifiers, developed in tandem since 2000 to mutually enhance performance. Flagship phono stages like the Accession MM, Reflex M, Era Gold V, and Revelation excel at extracting superior detail from vinyl, while headphone amps such as the Solo Ultra Linear and Novo deliver refined, high-fidelity drive. Graham Slee also offers DACs, focusing on compact, synergistic components for vinyl enthusiasts and headphone users rather than speakers, turntables, or cables.
Positioned as a niche boutique in the high-end hi-fi market, Graham Slee earns acclaim among discerning audiophiles for its uncompromised sound quality and value. Free from mass production, its products prioritize musical transparency and build integrity, appealing to serious vinyl collectors and headphone aficionados who seek understated excellence over hype.
See all Graham Slee listings on RADAR.
