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Very nice Morrison Preamp ELADWorks greatSeparate heavy power supplyPlease note some lettering is worn offwill properly box for safe shipping
At US$319, this sits a bit above the US$244 median but well below the US$626 75th percentile, so it reads as a fair-to-reasonable ask rather than a bargain or an overreach. It’s not cheap enough to be a steal, but it’s comfortably inside the normal used-market band.
The appeal here is the ELAD’s reputation for a very clean, uncolored, highly transparent presentation, and the separate power supply is a meaningful plus if it’s complete and working properly. For a well-kept example, this is the kind of preamp that can be a long-term keeper if you want honesty and low fuss over warmth; I’d mainly confirm input/output needs, the power-supply match, and that the unit is quiet at normal listening levels.
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.
See all Quantum Science Audio listings on RADAR.
