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At £209, this sits comfortably above the £159 median for 65 comparable used listings, but remains below the £258 75th-percentile mark. That makes it a fair-to-good price rather than a bargain, with the included PSU1 helping justify the premium over the £127 lower-quartile level.
The Solo is a respected, compact Class A amplifier with a clean, quiet presentation, strong timing and well-focused imaging. It suits a wide range of conventional headphones and offers two inputs plus a useful mute position; the PSU1 is the worthwhile upgrade, bringing a more substantial power supply than the basic adapter. Confirm that the correct PSU1, mains lead and DC cable are included, and check the headphone socket and volume control, but there is no obvious price red flag here.
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.
HiFi Forsale
Excellent
StereoNET
AU
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audio-markt.de
New
eBay UK
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eBay UK
