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This is a buyer’s market for this category, and at US$475 the asking price is a bit ambitious versus the recent used comps: it sits above the US$445 75th percentile and well over the US$414 median. It’s not absurdly out of line for a clean example, but it leaves less room for negotiation than a fair-price listing.
The TA-20 Plus is well regarded for a muscular, slightly tube-flavored presentation with enough current for demanding headphones, so it appeals to listeners who want a bit of drive and a touch of warmth without going full vintage-woolly. If this one is genuinely clean, from the original owner, and includes the stock power supply and any tubes/accessories, that helps justify the ask; otherwise, I’d press for a better number, since there’s no meaningful bargain cushion here.
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.
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