ปรีแอมป์หลอด บอร์ด Pre-Amp Tube Audio 6J2 Valve Preamp Bile Buffer

Specification: Channel Type: 2.0 / Stereo Power Input: AC 12V 1A /5.5*2.1 plug Knob Functions: power switch / volume control Instruction: 1, AC 12V input: Using DC 5.5 * 2.1 socket, 12V AC power adapter is available, you can also use 12V AC transformer, if you use 12V AC transformer, power lines need to solder on the circuit board. Remember: You can not use a DC power input, otherwise it does not work! 2, The left-channel input / right channel input: Audio signal input, can be connected to mobile phones, computers, M3, MP4, and other music players. 3, The output of the left channel/right channel outputput: The audio signal output terminal can be connected to the audio signal input amplifier, power amplifier boards, to provide post-amp Bile flavor of music to enjoy! 4, The power switch / volume knob: The knob counter-clockwise to decrease the volume beginning, when the volume down to the minimum, if it continues to rotate until the "ticking" sound, then the power off, the light goes off. In the off state, turn the knob clockwise to hear "tick" sound, light is on, the power is turned on, then the volume is minimal, then continue clockwise rotation is to increase the volume.