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Troubleshooting/QA
1: Get noise/humming when turn the BOX X2 on?
• Please know that when no inputs connected to BOX X2, the
default input way is MM input mode, in this mode, the gain of the
amplify is much large then other input modes, so it’s normal that
will have some humming sound when no sound pass through.
• Please unplug all the inputs from the BOX X2, then turn it on to
check if the noise still or not.
• If the noise disappear, the noise may from the audio source or
audio cable, please exchange the audio source and the audio
cable to try again.
• If the noise still, the noise may from BOX X2 or amplifier/
speakers:
• Please exchange the audio cables and amplifier (powered
speakers) to have a try and make sure that the noise is from
which devices.
• Please check whether the gain is too high, if the gain is too high,
the bottom noise may be more obvious.
• Please make sure all the cables completely pushed into the
device, incompletely connection will cause this issue.
• Please make sure that your turntable is MM output and
also make sure that it is phono output, some turntables
built-in phono preamplifier, so it should connect the
3.5mm AUX input on the BOX X2 not the phono input.
Also make sure the grounding wire is connected well
with the BOX X2, please reconnect it to have a try.
• Please keep this device away from other electronic devices, like
the FM radio or WIFI router.
• Please make sure the tubes is completely pushed into the socket,
incompletely connection will cause this issue.
Note: Once 3.5mm AUX plug in ,the MM input will automatically
interrupted, so the input mode will turn to 3.5mm AUX
input.
Input priority: 3.5MM AUX input > MM turntable input.
Step 4: Connect the power adapter to BOX X2 and the socket.
Turn the Multi-function Knob ( Power Switch/Gain
Adjustment Switch) clockwise for one time to power on
the BOX X2.
Note1: The power adapter does not have a power indicator light,
so connecting to the socket means power is on.
Note2: Before connecting the power supply, please make sure
that the BOX X2 is in “OFF” position when connecting to
the power adapter. Otherwise there is a “POP” click
sound from your speakers.
When the connection is completed, please turn on the BOX X2
first, then turn on the amplifier (or powered speakers), at last turn
on your turntable or other audio source, then enjoy.
Note: If you turn on the amplifier (or powered speakers)
first, then turn on the BOX X2, there is a “POP”
click sound from your speakers, it is normal that all
the phono preamp have the same issues, please
don’t worry about it, the “POP” click sound will not
damage your amplifiers or speakers.
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