The xDuoo MT-02 is a compact desktop headphone amp that pairs a dual 6J1 tube preamp stage with a Class A transistor output rated 1500mW at 32Ω, feeding 4.4mm and 6.35mm jacks and a volume-controlled RCA pre-out. It suits listeners who want a visible tube stage between a DAC or CD player and their headphones.
Who the xDuoo MT-02 is for
Tube-curious listeners: Two 6J1 tubes run the preamp stage behind clear acrylic front and rear panels, while transistors handle the current amplification.
Demanding headphones: xDuoo rates it at 1500mW into 32Ω, 500mW into 150Ω, 250mW into 300Ω and 130mW into 600Ω, with a low/high gain switch (+12dB/+18dB).
Mixed headphone plugs: A 4.4mm jack and a 6.35mm jack sit on the front panel, and a 6.35mm to 3.5mm adapter comes in the box.
Speaker setups: The RCA line out carries the tube-stage signal under the front volume knob, so it can feed a power amp or powered speakers.
Quiet power-ups: A protection relay holds the outputs through a 30-second tube warm-up and shuts down on overload or short circuit, and a rear ground terminal helps cut hum.
Skip it if: you need a built-in DAC or Bluetooth; the MT-02 takes one pair of RCA analog inputs, so a phone or computer needs a separate DAC.
xDuoo MT-02 key specs
Tubes: 2 × 6J1 in the preamp stage; Class A transistor output stage
Output power: 1500mW at 32Ω; 900mW at 75Ω; 500mW at 150Ω; 250mW at 300Ω; 130mW at 600Ω
Headphone outputs: 4.4mm and 6.35mm, front panel
Input and line out: RCA line in; RCA line out through the tube stage, volume-controlled
Power: DC 12V/2A from the included external adapter
Build: Aluminum alloy chassis; clear acrylic front and rear panels; ELNA coupling and Rubycon filter capacitors
Size and weight: 13.6 × 11.0 × 8.1cm; 0.61kg
In the box: MT-02, power adapter, AC cable, 6.35mm to 3.5mm adapter, user manual
Genuine xDuoo stock. Free shipping on every order, 45-day returns.
xDuoo MT-02 vs similar options
vs xDuoo MH-02: Adds a CS43131 USB DAC with DSD256 and 32-bit PCM decoding to a 6J1 tube stage; pick the MT-02 if you already own a DAC and want up to 1500mW at 32Ω from its transistor output stage.
vs Fosi Audio GR70: Adds a four-tube OTL design (2 × 5654W, 2 × 6Zh4/6Zh8) with bass and treble controls; pick the MT-02 for up to 1500mW at 32Ω from its transistor output stage and a 4.4mm jack.
Yes. Every unit we sell is genuine and brand-new, shipped in its original packaging, and backed by our 1-year TonePier warranty and 45-day returns.
Where does my order ship from, and how long does it take?
Every order ships from our warehouse in China, with full tracking, and most orders ship within 3 business days. Shipping is free on every order; most US orders arrive within 7–15 business days and most orders to other countries within 7–20 business days — see our shipping policy for details.
What if it isn't for me?
You get 45 days to decide. Keep the packaging, keep it in like-new condition, and send it back for a refund. Ear tips unsealed for hygiene reasons are fine — we expect you to actually listen.
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