Dc Finished Board 6K4 Tubes with Boost Version Preamp Board Amplifier Hifi Tube Preamplifier Board

Power supply:DC12-16V
Current: equal 1A
Instructions for use:
1. Locator with switch: the knob clockwise to "tick" a light, then the volume is the minimum,continue to clockwise to increase the volume
2. tube filament:tube to be inserted in , boot to see the tube filament light red, note that the backlight is also red, to tube filament light machine to operate
3. Audio output input:near the power connector side is the output,the output should be connected to the amplifier or active speakers,the input to the audio source: such as cell phones,CDs,computers,,MP3 and other low-level signal inputs
4. DC input, using DC3.5/5.5x2.1 socket
5. Left and right channel inputs are audio signal inputs that can be connected to low-level signal inputs
6. The left and right channel outputs are audio signal outputs,which can be connected to the audio signal inputs of amplifiers or active speakers.
7. Before this stage with amplification function, if your audio source itself with noise, it will amplify the noise that comes with the audio source, so please use a good audio source test!
8. The product we have been rigorously tested to that there is no problem before the issue of the machine does not come with the noise, if you encounter the above problems can be excluded from the test
Colour:As Shown
Material:Metal

Package Contents:
1 * Tube preamplifier

Only the above package content, other products are not included.
Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.