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A fair ask. At US$300, it lands right on the median of recent used listings, with the 25th percentile at US$298 and the 75th at US$325, so this is squarely in market rather than a bargain or an ambitious ask.
That still makes it worth a look: the TA-20 is a well-regarded hybrid desktop amp with plenty of power, balanced I/O, and enough drive for demanding headphones, while also giving you the tube flavor some listeners want without going fully soft or mushy. If the unit is clean and complete, the value case is solid; at this price, the main thing to verify is straightforward condition, original power supply, and that both channels are quiet and stable.
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.
