6J1 Valve Preamp Tube PreAmplifier Board Headphone Amplifier Buffer Acrylic Box

Features:
This machine uses a single 12V AC input by circuit processing provides 6J1 tubes needed positive and negative voltage and filament supply voltage.
Fever gall preamp circuit board is a principle of crew Musical Fidelity X-10D design, to be rational optimization, performance is more stable than the machine, tube play to improve ten percent.
works: a turn on the tube filament heating is started, when the boost voltage starts from zero boost, and hot filament tube, and also happens to boost boost finished, so this is the same with bile rectifier, 8 470UF capacitor filter is very clean, good supply system will not have a hum, the filament is 12V supply requires two filament tube is connected in series with a filament also to reduce noise.
6J1 Tube Buffer 0.85 times , connected between the source and before or after class, can effectively filter digital flavor.

Spefications:
: 2.0 / stereo
input:AC 12V 0.8 A / 5.5 * 2.5 plug
Switch function: the switch/volume
Size:77 x 75 x 52 mm

Instructions:
1, AC 12V input: The DC3.5 / 5.5 * 2.1 socket, 12V AC adapter, if you use non-plug AC 12V transformer, cord need to solder on the circuit board. Remember: You can not use a input, otherwise it does not work!
2, the left- input / right input: audio signal input, can be connected to mobile phones, computers, , the MP4, and music players.
3, the left output / right output: an audio signal output terminal can be connected to the audio signal input amplifier, amplifier board.
4, the switch / volume knob: turn 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 off, the light goes off; in the closed state, Turn the knob clockwise to hear "tick" sound, light is on, the is turned on, then the volume is minimal, then continue clockwise rotation is to increase the volume.

Package Included:
1 x Tube PreAmplifier Board
1 x Acrylic box

Note:
- Please allow 1-2mm differs due to manual measurement.
- Due to the different display and different light, the picture may not reflect the actual of the item. Thank for your understanding.








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