Alesis MultiMix12USB Reference Manual page 30

5
Troubleshooting
Audio signal carries an
unwanted hum.
Microphone level is too low.
No or low sound from a
channel.
Internal effects aren't
working.
28
Too much low-level noise in
the mix.
Interference from appliances
such as air conditioners.
Not using TRS cables.
Phantom power is not
turned on.
Microphone is damaged.
Fader is too low.
Instrument volume is too
low.
Channel is muted.
Gain is too low.
Effects level is too low.
An effect hasn't been
selected.
Engage the channel's high-pass
filter by pressing the HPF
switch.
Engage the channel's high-pass
filter by pressing the HPF
switch.
Make sure you are using 1/4"
TRS cables.
Turn on phantom power using
the switch on the rear panel of
the mixer.
Test the microphone on other
audio devices. If you detect
damage, contact the
manufacturer or dealer.
Raise channel fader.
Turn up the instrument's
volume control. If problem
persists, check the instrument by
plugging headphones into the
instrument's phone jack.
Check the MUTE / ALT 3/4
switch.
Adjust the channel's GAIN
control.
Turn up the level using the
EFFECTS / AUX RET B
LEVEL control in the master
section of the mixer.
Press the EFFECTS knob on
the desired effect and make sure
the SIG indicator is lit.