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Offered is „Silver 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 7010846167 ends on 16.10.2026 at 20:38 o'clock.
Against the recent EUR comparables, €2,700 is well above the €2,167 75th percentile and nearly triple the €969 median, so this reads as an ambitious ask rather than a fair-market used price. It only looks compelling if the seller can justify it with exceptional provenance, fresh service, or a genuinely scarce variant.
That said, these fuse pieces are bought for system tuning and can have a real following when someone wants to squeeze the last bit of refinement from a resolving rig. If the unit is clean, correctly rated, and comes with proof of authenticity or little usage, it may suit a buyer already convinced by the concept — but at this price, the burden is on the seller to explain the premium.
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.
