RADAR is a price search engine. We link to the original listing — we never sell direct. Transactions happen on the source site.
Offered is „Red Feinsicherung T 6,3 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 1602607802 ends on 05.11.2026 at 15:56 o'clock.
This is a strong deal. At €740, it sits exactly at the 25th percentile against your recent comparable market, and well below the €991 median, so it reads as attractively priced rather than merely fair.
The appeal here is straightforward: it’s the kind of small but serious hi-fi accessory enthusiasts buy for refinement and reliability, and a clean used example can be a nice low-risk pickup at this level. If the listing is genuinely good condition and complete, that’s the right kind of price to jump on.
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.
