1) Howling appears at startup
For example, it is normal for the microphone to whistle slightly when it is
just started. When the device is just started, it needs to learn to adapt to the
live sound field environment, and it will stop automatically after the learning
First, rule out whether the speaker is too near to the microphone,
and whether the distance is more than 3 meters. Check to see if the speaker
volume or microphone volume is too loud, and try turning the volume down.
The volume can be adjusted according to the on-site environment to meet
the needs. If the volume of the speaker is too large, it will not only damage
the hearing of the students, but also easily produce howling.
3) The sound reverberation is not clear
First check whether the room is too small and the reverberation is too large,
and then check the settings of the power amplifier or speaker EQ to see if the
low frequency part is adjusted too much.
4) No sound reinforcement (check the following steps)
a) Check whether the indicator light at the microphone cover is on. If it is
not on, it means that it is not activated. You need to check the power
supply line. If the red light is on, it means that the microphone is in the
state of stopping the amplification at this time, and the remote control
can be used to start the amplification;
b) If there is no sound when the indicator light is in the green amplification
state, first confirm whether the speaker is powered on and the volume is
c) If there is no problem with the microphone and the speaker, check
whether there is any error in the wiring of the audio output line. If the
line is not wrong, unplug the 3.5mm audio cable from the microphone,
connect it to the mobile phone to play sound, and check whether the
d) If the above steps are all correct, you can replace the microphone and
After turning on the amplifier, if the volume is low, you can use the remote
control to adjust the volume to see if the microphone volume is set too low,
or check whether the speaker volume is set too low.
6) The remote control does not respond
When the remote control controls the microphone, a prompt sound will be
played from the speaker. If there is no response, you can check the
a) Make sure the remote control has batteries installed;
b) The remote control is infrared control, it is necessary to aim at the
infrared receiving port of the microphone as much as possible, and the
distance is within 3 meters;
c) Observe the color of the indicator light of the microphone, it will be red
when the amplification is stopped, and green when the amplification is
turned on. If the indicator light can be switched normally during control,
it means that there is no problem with the remote control, and if there is
no prompt sound, it is necessary to check the problem of outputting to
