Alesis M1 Active Mk2 Reference Manual page 29

P
OWER SWITCH
The POWER switch is located on the back panel. A blue power indicator
lamp is on the front panel.
I
NPUT
Almost any conventional line-level source may be plugged into the M1 Active
Mk2's LINE INPUT jack. The Line Input jack accepts both XLR and 1/4"
input plugs wired either balanced or single-ended (unbalanced). The best
connection is to use a high-quality XLR-to-XLR "mic cable" between the
output of the source (usually, the CONTROL ROOM OUTPUT of the console)
and the speakers. A conventional 1/4" "patch cord" mono TS-type plug will
also work for unbalanced sources which automatically ground the minus
input.
Polarity: Input connector wiring is printed to the left of the connector on the
back panel and is as follows:
+ Pin 2: tip ("hot")
- Pin 3: ring ("cold")
Shield Pin 1: sleeve (ground)
A positive voltage on the "hot" connector will cause the drivers to move
outwards.
Unbalanced Line Input
Signal
Ground
Tip
Direct connection of unbalanced -10 dBV line level sources: Most
synthesizers, drum machines, effect devices, cassette decks and CD players
operate at this level. Their average signal level is about 1/3 of a volt. They
have a 2-conductor output jack that is either a 1/4" phone or "RCA phono"
type. These may be plugged directly into the M1 Active Mk2's LINE IN jacks.
M1 Active Mk2 Reference Manual
C
ONNECTIONS
Tip
Sleeve
Sleeve
Speaker Installation
Balanced Line Input
Hot
Cold
Ground
Tip
Sleeve
Ring
Tip
Ring
Sleeve
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