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US$70 is a strong deal: it sits below the US$62–US$121 middle market range’s lower quartile threshold? More precisely, it is above the 25th-percentile asking price of US$62 but still comfortably below the US$81 median, making it a good buy if it is working properly and complete. It is not an implausibly cheap price, but it is clearly better than average.
The MT-602 is a capable hybrid design, combining a 6J1 tube preamp stage with a Class A solid-state output section, up to 1300 mW into 32 ohms, and useful preamp functionality. Its replaceable tubes and both 3.5 mm and 6.35 mm outputs add flexibility, while it generally suits demanding headphones better than very sensitive IEMs, where background hiss can be audible. Confirm that the 12 V power supply is included and that both channels, tube illumination, volume control, and outputs work before buying.
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.
