Troubleshooting - Alesis M1 Active MKII Reference Manual

T
ROUBLESHOOTING
If you experience problems while using the M1 Active/Surround systems,
please use the following table to locate possible causes and solutions before
contacting Alesis Technical Support for assistance.
Symptom
Hum or buzz
No sound
Unfocused sound,
bass frequencies
muddy or missing
Distorted output
M1 Active Mk2 Reference Manual
T
ROUBLESHOOTING
I
NDEX
Cause
Ground loop
between source and
speaker
Speaker
disconnected
INPUT LEVEL down Turn up input control
AC power not on
Inputs out of phase
Subwoofer being
used improperly
Poor mix
Power amp
overloading
speakers
Damaged speaker
components

Troubleshooting

C
HAPTER
Solution
Use balanced cables.
Put M1 Actives on the
same AC power circuit
as the mixer.
Check input cable
connections
on back panel
Blue LED on front
should be on. Check
switch and power
input cable.
Check + and -
connections from mixer
to input. Verify "pin 2
is hot".
Install port plugs when
using a subwoofer
Compare to
commercial CD of
similar style: time to
remix your track....
Tu rn d own l ev e l
Swap ch an n e l s t o see i f
t h e pr ob le m f ol lo ws t h e
spe ak er ; i f so c on t act
Te ch n i cal Supp or t
4
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