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For sale is an xDuoo TA-20 balanced tube headphone amplifier in excellent working condition. This unit delivers the warm, spacious, and dynamic sound that has made the TA-20 a favorite among headphone enthusiasts and tube audio fans alike.In addition to its intended use as a high-performance balanced headphone amplifier, the TA-20 can also serve as a unique stereo or dual-mono tube signal processor when used with the included 4-pin XLR to dual 3-pin XLR splitter cable. By routing signal through the balanced output stage, users can creatively incorporate the TA-20’s tube character, harmonic richness, and analog warmth into studio, hi-fi, or experimental audio workflows.Features:Fully balanced hybrid tube headphone amplifierDual 12AU7 tube designWarm, detailed, and spacious sound signatureBalanced XLR and RCA inputs4-pin balanced headphone outputIncludes 4-pin XLR to dual 3-pin XLR splitter cableCan be creatively utilized as a stereo or dual-mono tube outboard processorExcellent for headphone listening, audio experimentation, and adding tube coloration to balanced signal chainsCondition:Fully functionalClean cosmetic condition with normal signs of useTubes and controls operate as expectedIncludes:xDuoo TA-20Power cable4-pin XLR to dual 3-pin XLR splitter cableA versatile piece that bridges the gap between hi-fi listening and creative audio production, offering both an exceptional headphone experience and unique tube-processing possibilities.Feel free to reach out with any questions. Thanks for looking!
At US$350, this is above the local used market for the model: against your database anchor, it sits well over the US$298 75th percentile, so I’d call it ambitious rather than fair. There’s room to pay a premium for a cleaner package, but this is not a bargain at current asking.
That said, the TA-20 is a respected hybrid tube headphone amp, and the inclusion of the 4-pin XLR splitter cable adds real utility if you’re running balanced headphones or want to get set up quickly. For a buyer who specifically wants the xDuoo sound and the tube-outboard flexibility, it can still make sense if the unit is genuinely clean, well cared for, and you value the accessory bundle enough to justify the extra spend.
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.
