1、USB DAC & Tube Headphone Amplifier: The MH-02 is a small USB decoding tube headphone amplifier that functions as a USB DAC and tube headphone amplifier, providing users with high-quality audio decoding capabilities. 2、High Sampling Rate Support: Supports a maximum sampling rate of PCM 32bit/384kHz and DSD256, utilizing the high-spec CS43131 DAC chip to deliver clearer and higher-quality analog signals for an enhanced listening experience. 3、Tube Preamp and Transistor Class A Buffer: Equipped with dual 6J1 tubes in the front preamp for delicate and smooth audio processing, a transistor Class A buffer in the rear amplifier with strong load capacity to drive various headphones effortlessly. 4、AUX Output with Tube Processing: Features an AUX output that is processed through tubes and controllable via the volume knob, allowing for easy connection to active speakers and enhancing the overall sound quality of your speaker setup. 5、12V DC Power Input: Powered by a 12V DC input, which not only maximizes the amplifier's capabilities but also significantly reduces the weight and size of the device, making it more lightweight and portable for convenient use.