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Is this a strong enough price to buy without hesitating? At £120, it sits well below the £129 25th percentile for recent used GBP listings, so this looks like a genuine bargain rather than just a decent value. For a buyer, that usually means the market is already giving you room for any small unknowns without paying up.
The PSU1 is widely respected as a clean, no-nonsense external supply that can let compatible Graham Slee gear sound more settled and refined, especially in a well-matched system. At this level, the main upside is simply getting a well-regarded piece of power supply engineering for less than typical used money; if it’s complete and working properly, it’s the kind of listing that rewards a quick move.
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.
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