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Angeboten wird „red fuse - 5x20 mm - 2,5 A and 5 A“ von QSA als Gebrauchtgerät aus der Kategorie „HiFi-Tuning-Zubehör“ bei audio-markt.de - dem Online-Marktplatz für High-End. Das Inserat mit der Nummer 4476606473 endet am 23.07.2026 um 12:07 Uhr.
At €845, this Quantum Science Audio 5x20mm fuse is a fair buy, sitting just €5 above the median of €840 for recent used EUR listings. It clearly falls within the tight market range of €830–€850, so you are paying typical value rather than getting a bargain or overpaying.
This fuse is well-regarded for removing Bottleneck Distortions and delivering extreme, natural detailing that many users credit for 70–80% performance gains over stock options. As a used 5x20mm slow-blow unit in good condition, it offers genuine sonic upside for any system seeking refined power delivery, with no red flags at this price point. If it includes original packaging or is from an original owner, that adds subtle value, but even standalone, it’s a solid opportunity for enthusiasts ready to upgrade their power chain.
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.
