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The Assemblage DAC-1 is a classic vintage digital-to-analog converter kit released in 1995 by The Parts Connection, which was a mail-order division of the high-end audio manufacturer Sonic Frontiers.Originally sold assembled for $650 (over $1,400 in today's money), or as a kit for $449. This unit seems to have been factory assembled.The DAC 1 features a dual 20-bit processor architecture utilizing Burr-Brown PCM-series DAC chips paired with an Analog Devices AD847 op-amp chip for the output driver stage.Reviewers from Stereophile praised the DAC-1 for delivering a coherent, comprehensible soundstage that punched well above its price tag. It is characterized by its mid-band warmth and smooth presentation, though it does experience some minor high-frequency irregularities when handling loud, aggressive pitches compared to much higher-end competition.This unit is in very good cosmetic condition, with only a few surface scuffs on the bottom panel. It is fully functional, and sounds amazing!Comes with a 30 day warranty, and free shipping in continental USA.Check our feedback an bid with confidence!
US$310 is a fair-to-slightly-strong ask, sitting above the US$218 median but well below the US$543 upper quartile for recent comparable listings. It is not a bargain on price alone, but it is still comfortably within the normal used-market band.
This is the kind of vintage digital piece that appeals to enthusiasts who want a respected early DAC with solid build quality and a distinctive sonic pedigree. The “excellent condition” claim matters here, because clean examples of older audio converters tend to age better as collector-grade buys than as riskier project pieces; if it’s complete and functions properly, the appeal is in getting a well-regarded, characterful component without paying top-quartile money.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Quantum Science Audio (QSA) emerged in early 2020 under the leadership of Steven Tsang, an electronic engineering expert with deep roots in audio consulting. Based in Scottsdale, Arizona, with ties to Hong Kong where Tsang honed his expertise, the brand quickly carved a niche through relentless innovation in power components. Drawing from over two decades of proprietary research, QSA embodies a fusion of technical discipline and audio obsession, prioritizing subtle yet profound system enhancements.
The company's focus centers on high-performance aftermarket fuses, including thermal, slow-blow, automotive, and specialized AC variants like inlets, outlets, and panel breakers. QSA also extends into power receptacles and related accessories, all engineered to eliminate so-called "bottlenecks" in signal paths. Their lineup spans accessible entry points at around $28 to ultra-premium models commanding exorbitant prices, reflecting escalating tiers of advanced materials and quantum-inspired treatments.
In the hi-fi market, QSA occupies a polarizing boutique position among high-end enthusiasts, celebrated by some for transformative sound improvements in power delivery. Top models attract audiophiles chasing marginal gains, though skeptics dismiss the claims as overreach amid long production lead times. This niche status suits discerning buyers open to experimental upgrades in an otherwise crowded field.
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