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The MT-602 has earned a nice reputation as a compact hybrid amp: tube preamp character up front, muscular Class A solid-state drive behind it. At US$70, this is a strong deal—exactly the median of 13 comparable listings, and well below the US$120 75th-percentile level. It is not merely an impulse buy, but it is firmly fair rather than ambitious.
Its appeal is versatility: roughly 1300 mW into 32 ohms, support for a broad range of headphones, 3.5 mm and 6.35 mm outputs, and a variable RCA preamp output for powered speakers or a power amp. The presentation is generally lively, slightly warm, and spacious, while the solid-state buffer supplies useful punch. The unknown condition is the only reason to inspect carefully: confirm both tubes, the 12V power supply, clean volume operation, and that the RCA preamp output works. For a healthy, complete example, US$70 is a buying opportunity.
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.
