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SW1X Level II + with USB Digital Analog Converter (DAC) Interesting NOS dac from boutique manufacturer in UK. High quality parts used through, reminiscent of Audio Note with quality chokes, tubes and caps throughout. Even the USB input board utilises a nu-vista style tube in the signal path. The spdif input in this dac is unbelievably good. Description: DAC II comes equipped with more sophisticated power supplies and powerful 6N6P/6N30P/5687/E182CC valve output stage with 6X5GT (or 5Y3) valve rectification. The DAC II has a similar analogue & musical character akin to DAC level I bu
At this price point, you're weighing the SW1X Level II+ against solid-state DACs like a used Chord Qutest or Denafrips Terminator, which deliver cleaner resolution for less fuss. This tube-hybrid model—likely akin to the DAC II Special with USB, retailing new around AUD7,500—commands a premium for its lush, organic TDA1541 soundstage. Asking AUD5,250 feels ambitious for used; typical market ranges AUD3,500-4,500 in good nick, assuming no recent tube swaps.
Buyers, verify tube life first—6N6P/5687 outputs and rectifier like 6X5GT degrade fast, needing AUD500+ replacements every 2-3k hours. Confirm USB board authenticity (optional upgrade), full original box/manual/remote, and recent service history; audition for hum or digital glare, as aging OPTs or PS caps can sour the magic.
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.
