ALESIS M1 Active Mk2 - Manual (Page 37)

Troubleshooting
M1 Active Mk2 Reference Manual
39
C HAPTER 4
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ROUBLESHOOTING
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ROUBLESHOOTING
I
NDEX
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 Cause Solution
Hum or buzz Ground loop
between source and
speaker Use balanced cables.
Put M1 Actives on the
same AC power circuit
as the mixer.
No sound Speaker
disconnected Check input cable
connections
INPUT LEVEL down Turn up input control
on back panel
AC power not on Blue LED on front
should be on. Check
switch and power
input cable.
Unfocused sound,
bass frequencies
muddy or missing Inputs out of phase Check + and -
connections from mixer
to input. Verify “pin 2
is hot”.
Subwoofer being
used improperly Install port plugs when
using a subwoofer
Poor mix Compare to
commercial CD of
similar style: time to
remix your track....
Distorted output Power amp
overloading
speakers Tu rn d own l ev e l
Damaged speaker
components 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