XDUOO MT-602 6J1 Tube Transistor Headphone Amplifier

Hybrid Tube and Transistor Design

The XDUOO MT-602 combines a 6J1 tube pre-amplifier with a transistor Class-A buffer stage. This hybrid topology blends tube warmth with transistor speed and drive. Japanese ELNA coupling capacitors and RUBYCON main filter capacitors are used for transparent sweetness and smooth high frequencies. A built-in mute relay prevents turn-on pop noise. Gold-plated RCA connectors handle line-level input and output. The unit runs from a DC 12 V 1 A supply.

Desktop Listeners Wanting Tube Character

Headphone enthusiasts who value the soft, musical midrange of a tube stage but need the current delivery of a solid-state buffer will appreciate this amplifier. It drives loads from 16 to 600 ohms with up to 1300 mW into 32 ohms. Buyers who require balanced connections, digital inputs, wireless streaming, or a purely tube signal path should look at other designs. The single-ended RCA topology and fixed +15 dB gain also limit flexibility for some system configurations.

Stable Output Into Demanding Loads

The transistor buffer delivers consistent power across the 10 Hz to 60 kHz bandwidth with THD+N below 0.5 % and a signal-to-noise ratio of 115 dB. Under sustained listening sessions the hybrid circuit maintains low distortion without the thermal drift sometimes seen in pure Class-A tube output stages. The compact 12 × 7.8 × 4 cm chassis weighs 0.38 kg and relies on passive cooling, so prolonged high-volume use remains within safe operating limits.