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SW1X PRE iii SPECIAL Preamplifer in excellent condition. Black fascia and black case. Upgrades include Sapele hardwood base and custom aluminium/ brass feet that make a marked improvement. JAN Sylvania 5931 -5U4GB rectifier tube. Biasing batteries replaced recently. So you won’t need to change them for another 18 months. Comes with manufacturer packaging. I’ve set as collection but I’d be willing to deliver within a certain distance and/or can meet halfway.
This is a well-regarded, no-nonsense tube line stage with real pedigree, and the asking price looks sensible. At £7,500, it sits below the £8,282 median and above the £6,074 25th percentile, so it’s a fair buy rather than a steal, but still clearly in the right zone for a desirable example.
What makes it worth a look is the usual SW1X strength: a dense, organic presentation with very good drive and separation, especially if you like a more musically continuous, transformer-coupled sound. The upside here is straightforward—if the unit is clean and complete, you’re buying into a sought-after preamp at a price that leaves room versus the recent middle of the market. Condition details matter, but at this level the listing reads as an enthusiast’s opportunity, not a risk case.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
SW1X Audio Design, founded by Dr. Slawa Roschkow—a Russian engineer who settled in Great Britain via Germany—traces its roots to Essex, England, where all products are designed and hand-assembled. Pronounced "As One eX Audio Design," the brand embodies Roschkow's vision as founder, managing director, and chief audio engineer to push the boundaries of musical authenticity. From its inception, SW1X has prioritized timeless, high-performance equipment over cost constraints, resurrecting the soul of recordings through meticulous craftsmanship.
The brand specializes in extreme, valve/tube-based audio components, including DACs like the DAC III and DAC II SPX, alongside amplifiers and integrated systems that ascend through performance levels from I to X. These designs eschew modern oversampling in favor of non-oversampling discrete R2R architectures, delivering fluid, organic sound. SW1X focuses on pure analog-like reproduction, with each tier refining circuits for greater lushness and expressiveness, appealing to purists seeking unadulterated musicality.
Positioned as a niche boutique in the high-end hi-fi market, SW1X commands a cult following among discerning audiophiles for its upbeat, soulful presentation that redefines digital and tube playback. Reviewed glowingly in specialist forums and publications, it stands apart from mass-market offerings, thriving in exclusive showrooms like Germany's Audio Creativ. For knowledgeable buyers, SW1X represents uncompromising excellence in a crowded field.
See all SW1X listings on RADAR.
