A valve amplifier or tube amplifier is a type of electronic amplifier that uses vacuum tubes to increase the amplitude or power of a signal. Connect this 6J1 tube pre-amplifier between sound source and and it can effectivelyfilter digital flavor. Tube amplifier produces a warmer or more natural valve sound, make music and human voice is relatively good.
Type: 6J1 tube (substitution model 6AK5, 6AU6, 5654 etc.)
Channel Types: 2.0 / stereo
Voltage & Current: AC12V 0.8A or above
Power Interface: 5.5 * 2.5 plug
Circuit Board Size: 77 x 75mm / 3.03 x 2.95"
1, AC 12V Input: using DC 5.5*2.1 socket and AC 12V transformer, you can also use AC 12V transformer without plug, just need to weld the power cord onto the circuit board. DC power input can not be used, or it will not work.
2, Sound Channel Input: Connected to mobile phone, computer, MP3, MP4 and many other music players.