Fosi Audio P1, Руководство пользователя, Страница: 9 / 12

4: Why do loudspeakers make a lot of electric noise?
• If you are not using the original factory standard power supply,
please replace the power supply before testing. Many power
supplies in the market have a large interference coefficient, which
will cause a lot of current sounds.
• Because the electronic tube is vulnerable to electromagnetic
interference, make sure there are no sockets, computers, radios,
and other strong magnetic products around the electronic tube.
• If the above is normal, please shut down P1 and plug in and out
the electronic tube again to ensure that all electronic tubes are
fully connected to P1. In addition, please replace the sound
source and wire and test again to confirm whether the problem is
caused by the sound source or P1.
5: Why the speaker has a drone when I just plug in the
input cable but don’t connect the sound sources?
• 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.
6: Why the sound is very hard at the beginning, the 3
frequencies are not very clear, but normally after a day of
use?
• 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.
7: Can I update the tube?
• yes, we have tested and matched 6k4/6J1/6j4 /
GE5654/6ak5/66*1n1n in our company. It can be replaced directly.
The sound will be different with the different tubes.
8: Can I replace the tube without power off?
• no, it is very easy to burn the tube, because the machine works
under high voltage and the hotplug will damage the tube &
machine, also will hurt the people.
9: Can this machine connect to the phonograph/phono-
graph?
• 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. If you would like to connect the
phonograph, you can choose our phono preamplifiers, such as
BOX X1, BOX X2, BOX X4.
10: Can I hook the P1 to the power amplifier for my
system?
• Yes. You can connect the P1 to the power amplifier through the
RCA output.