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Presents in excellent condition
This is a strong deal. At A$140, it sits well below the 25th percentile of A$302 and far under the A$1,471 median of the recent comparables, so the asking price looks very attractive for a like-new pair. Even allowing for the wide spread in the market, this is clearly on the cheap side rather than merely “reasonable.”
That makes it worth a close look if you want a clean, used entry into the Quantum Science Audio sound: these are generally valued for their refined, audiophile-leaning presentation and the chance to get serious performance without paying full replacement cost. In like-new condition, the upside is obvious, especially if the original packing, grilles, and any matching hardware are included. At this price, the main job is simply confirming they’re complete and functioning properly.
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.
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