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Schiit Modi 3+ DAC - Black - Barley used, Mint. No factor box or cables but will ship packed well and double boxed.
At US$90, this is a strong deal: it sits exactly at the 25th-percentile mark and well below the US$230 median for comparable listings, making it a genuine bargain if the unit works.
The Modi is a well-regarded, compact entry-level DAC with clean, neutral conversion and a useful way to improve a computer, streamer, or older digital source without complicating the system. The main uncertainty is the unspecified generation: older versions may have fewer inputs or lower-resolution support than later Modi models, so confirm the rear-panel connections and included USB or power accessories before buying. At this price, though, basic functionality matters far more than the exact revision.
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.
