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Offered is „Red-Black Feinsicherung T 2,5 A 5 x 20 mm“ by QSA as second-hand device from the category „Micro fuses“ on audio-markt.de - the online market place for high-end. The advert with the number 4086640402 ends on 05.11.2026 at 15:48 o'clock.
At €1,490, this sits above the €991 median and between the €740 and €1,793 quartiles, so it reads as a solid but not cheap asking price. It’s not a bargain, but it is still within the normal used-market spread for this niche item.
What makes it worth considering is the sort of component this is: a specialist, well-regarded tweak-piece that buyers usually choose for system tuning rather than flashy spec chasing. If the listing is genuinely clean and the right value is in the exact type, rating, and physical condition, the upside is mostly in avoiding retail markup and getting a known-good example ready to drop in.
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.
