User Manual

A: if you are not using the original factory standard power supply, please replace the power supply before
testing.Many power supply in the market have large interference coefficient, which will cause a lot of current
sound.
Q: Why the headphone has drone when I just plug in the input cablebut don’t connect the sound sources ?
A: If you use unshielded signal lines, there will be interference signals entering the power amplifier. If
you hate the sound, you are advised to use the shielded signal lines or unplug the signal lines.
Q: Why the sound is very hard at the beginning, the 3 frequencies is not very clear, but normalafter a day
use?
A: The tube is a very sensitive device with good effect once the temperature should reach a degree commonly,
normally about half an hour later the voice is very natural.
Q: Can I update the tube?
A: yes, we have tested and matched 6k4/6j4 / GE5654/6ak5/66*1n1n in our factory. It can be replaced directly.
The sound will be different with different tube.
Q: Can I replace the tube without power off ?
A: no, it is very easy to burn the tube, because the machine works under high voltage and the hot plug will
damage the tube & machine, also will hurt the people
Q: Can this machine connect to the phonograph/phonograph?
A: At present, this model does not support the signal,input of the phonograph/gramophone because the output
signal amplitude of the phonograph/gramophone is small, so it needs to increase the phonograph amplifier.
Warning:
1. Please do not open the shell without permission. Improper operation may cause the danger of electric shock.
2. Please use the power supply of the regular manufacturer, otherwise it will damage the machine.
3. Please do not use the machine in a high temperature and humidity environment.
4. Please don’t replace the tube when the power on, otherwise the tube & machine will be demaged
5. Please don’t use the non-matched tube, otherwise the tube & machine will be demaged