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Recent comparable listings put this model’s market median at US$237, with the 25th percentile at US$94 and the 75th at US$587. At US$225, the asking price is essentially fair—slightly below the median, but not a bargain on price alone.
The NAD 114 remains a worthwhile vintage preamp thanks to its versatile MM/MC phono stage, six line-level inputs, useful tone controls, dual power-amp outputs, and notably capable headphone output. It has a clean, neutral presentation and makes a practical partner for a classic power amplifier. Since this is a mid-1990s unit, confirmed operation of every input, the phono selector, switches, pots, and headphone output matters; if it is fully tested and quiet, US$225 is a sensible buy rather than an overreach.
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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