Adopt double 6J1 tube for pre-amp, making voice sweet and exquisite. Adopt transistors for class A buffer, strong output power can easily drive many kind earphones.. CS43131 DAC CHIP. The DAC chip uses the CS43131 chip known for its extremely low noise and higher resolution resulting in superior decoding performance.. LINE OUT CAN BE USED AS PRE-AMPLIFIER. It has one line output, through the tube, and is controlled by volume. It can be used as the Pre-amplifier of all kinds of audio amplifiers or active speakers. and improve the sound quality of the audio amplifier or active speaker.
. BUILT-IN PROTECT CIRCUIT. It built-in relay for a mute circuit when turned on amplifier to avoid POP noise and make sure the tube is worked in its best condition.. SANDBLAST TEXTURED SHELL, HAS A SIMPLE APPEARANCE. Sandblast textured and hard aluminum alloy shells are slap-up and can resist external interference effectively.