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Surround Sound
32 M1 ACTIVE REFERENCE MANUAL
The use of M1 Actives (or any monopolar speaker) as full-range surrounds would be
useful in the following cases:
• If the surround speakers are just as important as the fronts in achieving a
specialized effect, such as completely mixing the sax in the left rear only and a
flute in the right rear.
• If you know that your mix will always be played back on a monopolar surround
system.
• If the control room is completely damped with sound absorption on all surfaces.
(This renders the reverberant-field generating properties of a bipole/dipole
speaker ineffective.)
* Dolby Surround, Dolby Pro Logic, and Dolby Digital are trademarks of Dolby Laboratories, Inc.
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HAPTER
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ROUBLESHOOTING
Troubleshooting Index
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
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
Tur n d own lev e l
Damaged speaker
components
Sw ap c han n e l s to se e i f th e
pr ob l e m fo l l ows th e
spe ak er ; i f so c on tac t
Te ch n i cal Suppor t