xDuoo MT-604 Balanced Tube Headphone Amplifier

Fully-balanced tube amp xDuoo doesn’t do incremental improvements. They evolve by leaps and bounds. The MT-604 is a Class-A tube amp that doubles its predecessor’s tube count and channels, making for a fully balanced tube amp experience.  Class-A amplifier The MT-604 is a class-A amplifier. Using simple circuits that draw the same amount of current and consume the same amount of energy whether receiving a signal or not, this is the most straightforward of amplifier types. It isn’t subject to electromagnetic interference caused by digital components, so its total harmonic distortion and signal-to-noise ratio are exceptionally low. 53% more power than the MT-602 The MT-604 outputs up to 2000mW (32Ω) of power. That’s 53% more power than the MT-602--enough to drive even the HiFiMAN HE-4.  Tube + transistor A common complaint about tube amplifiers is their lack of high frequency response and resolving power. To overcome this, xDuoo added a rear transistor circuit capable of large dynamics,