Description - Audio signal input end can connect to the computer, CD, phone and other player for lossless audio.- The output end can connect to the digital amplifiers, active multimedia audio devices.- With treble and bass adjustment function.- After the D2 connecting to the audio device, the boot is: turn on the D2,then amplifier or the audio device.- This is the preamp, not power amplifier. It needs to be connected to the amplifier or active audio devices.- Gold-plated for input and output terminals- 6J1 valve tube- No background noise Specifications: - Audio input: RCA input - Audio output: RCA output - Power DC input: 12V input- Aluminum shell, CNC processing- HIFI PREAMP- Laser carving characters- Color: Silver,Black อุปกรณ์ในกล่อง- Audio Pre-amplifier- Adapter 12 V 1A- 3 x 6J1 Tubeอ่านเพิ่มเติม