1. Welded product


Channel Type: 2.0 / Stereo
Power Input: AC12V 1A /5.5*2.1 plug
Knob Functions: power switch / volume control
Features:
* FE-6J1-2.0B designed for music enthusiasts design and development. Today, due to the improvement of people's living standards, the pursuit of quality has been improved, in the 1960s, can hear the sound of music has been very satisfied, and now, what we need is high-quality music, including automotive CD, lossless format WAV, APE, FALC. But sad reminder that: often not download these lossless formats of music, but to hear high-fidelity sound quality, which you may wish to consider this our forward-grade fever, although it is not 100 percent lossless sound reduction, but in absolutely enhance the sound quality is very good. It will bring you an unexpected surprise!
Instructions:
1, AC 12V input:
Using DC5.5 * 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 output:
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.
Package Included:
1 x Pre-amp Tube PreAmplifier Board


2. Kits

100% brand new and high quality
Material: Plastic, Metal
Color: See pictures
1. SIZE: 77 MM * 75 MM * 52 MM
2. Power input: AC 12 V1A 5.5 * 2.5 PLUG
3. Channle: 2.0 / Stereo
4. Potentiometer Function: Volume + Power Switch setting
Specification:
FE-6J1-2 tube fever plate pre-amp is the circuit schematic imitation design team Music fax X-10D, to be rational optimization, more stable performance than the original machine, 10% tube set increase. This board uses a single 12 V AC input battery, the processing circuit provides 6J1 tube required positive and negative voltage and voltage supply filament voltage.
Energy works: an open tube feeding the filament heating is started, when the impulse from zero-tension start to increase the hot filament tube, etc., also happens to boost boost finish, so this is the same with the 8 * 470 UF capacitor very clean filter, good power supply system will not have a buzzing, the filament is 12 V DC power supply, needs two tube is connected in series with a DC filament filament too in order Reduce noise.
Tips: If you need a welding bome, please open this link: T12 Welding Iron Station Controller
Not Retail Package
Note: Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!
Package included:
1Pc x Tube 6J1 Preamp Board Module Preamplifier Kit Diy

3. Welded+Case


Channel Type: 2.0 / Stereo
Power Input: AC12V 1A /5.5*2.1 plug
Knob Functions: power switch / volume control
Features:
FE-6J1-2.0B designed for music enthusiasts design and development. Today, due to the improvement of people's living standards, the pursuit of quality has been improved, in the 1960s, can hear the sound of music has been very satisfied, and now, what we need is high-quality music, including automotive CD, lossless format WAV, APE, FALC. But sad reminder that: often not download these lossless formats of music, but to hear high-fidelity sound quality, which you may wish to consider this our forward-grade fever, although it is not 100 percent lossless sound reduction, but in absolutely enhance the sound quality is very good. It will bring you an unexpected surprise!
Instructions:
1, AC 12V input:
Using DC5.5 * 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 output:
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.
Acrylic Case for AC 12V 6J1 Valve Pre-amp Tube PreAmplifier Board Headphone Amplifier
Acrylic Case ( Not Included Board )
Package Included:
1*AC 12V 6J1 Valve Pre-amp Tube PreAmplifier Board Headphone Amplifier Buffer(Welded)
1*Acrylic Case(Kits)