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Angeboten wird „RED 5 x 20 mm 5AT Feinsicherung“ von QSA als Gebrauchtgerät aus der Kategorie „Feinsicherungen“ bei audio-markt.de - dem Online-Marktplatz für High-End. Das Inserat mit der Nummer 4793412634 endet am 18.09.2026 um 09:54 Uhr.
This €820 asking price for a used Quantum Science Audio 5x20mm fuse is a strong deal, sitting well below the 25th percentile of €830 and significantly under the median of €840 from recent comparable EUR listings. In a market where the typical range clusters tightly between €830 and €850, this listing offers genuine value for a component known to remove bottleneck distortions and deliver extreme, natural detailing.
Quantum Science Audio fuses are well-regarded for improving system performance by 70–80% compared to standard parts, a jump that far exceeds the gains from aftermarket power cords. The upside here is timing and price: securing a high-level slow-blow fuse that retails for over €2,000 at just €820 represents a rare opportunity to upgrade power integrity without the usual cost. With no noted condition issues in the listing, this is a clean buying opportunity for listeners seeking maximum clarity.
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.
