Optimus M50 Installation And Operating Instructions Manual page 25

M50
Portable amplifier 50 W
6. TROUBLE SHOOTING
Problems Causes and solutions
Check the power supply or the volume.
Check the installation of the battery.
No volume
Check the wire of the microphone.
Don't use the microphone over 35 m.
Check the capability of the battery in the microphone.
Check the capability of he battery in the unit.
Cacophony
Check the wire of the microphone.
Check if there is some external frequency that disturbs the frequency of the
microphone.
Check that the volume level is not too high, lower the volume.
The distance of wireless microphone and unit is too close; you should try to
keep a distance of 10 m between them.
Howling
The microphone is too close of speaker; you should try to put the
microphone to another angle.
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M50 Version 1.1