RADAR is a price search engine. We link to the original listing — we never sell direct. Transactions happen on the source site.
This is a strong deal at US$85. New pricing sits around US$169, so this ask is roughly half retail and comfortably below the usual new-market anchor for the model, which makes it very attractive if the unit is working properly.
The DA-100 is a well-liked compact amp/DAC for a desktop or small-room setup: it combines USB DAC, Bluetooth, and a modest speaker amp stage, so you get a lot of flexibility in one box. At this price, the main upside is simple value—if it’s clean, includes the power supply, and hasn’t been abused, it’s an easy buy for someone wanting an inexpensive all-in-one without chasing perfection.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
xDuoo is a Shenzhen, China-based audio brand that emerged from the country’s fast-growing hi-fi manufacturing ecosystem. Its exact founding year is not consistently stated in the sources available here, and no founder is prominently verified, but the company is widely presented as Shenzhen xDuoo Technology Co., Ltd., with roots in OEM/ODM production before building its own consumer-facing identity.
The brand is best known for headphone amplifiers, DAC/amp combos, portable DACs, tube hybrids, and other desktop-and-portable electronics aimed at personal audio enthusiasts. xDuoo’s lineup has included tube headphone amps, balanced amplifier designs, digital-to-analog converters, and all-in-one sources, typically positioned for headphones rather than loudspeakers or turntables.
In the market, xDuoo sits in the value-to-mid-tier audiophile segment, with a reputation for offering ambitious feature sets, lots of connectivity, and occasional tube-flavored designs at relatively accessible prices. It is not generally considered a luxury or vintage-collector brand, but rather a practical, performance-driven Chinese hi-fi maker with a strong presence among enthusiasts seeking high features per dollar.
See all xDuoo listings on RADAR.
