Alto PBM4 SISTEMA User Manual page 11

Strain Clamp
2=Hot(+)
Use for Balanced Mic Inputs
(For unbalanced use, connect pin 1 to 3)
3-pin XLR Male Plug
(seen from soldering side)
MAIN SPEAKERS CONNECTION
Please use only the power connectors to make connections with other signal
source equipment for the passive speaker cabinets. The power connector has
four terminals: 1+, 1-, 2+, 2-.
5. INSTALLATION AND CONNECTION 3. CONTROL ELEMENTS
Sleeve
1/4" Stereo (TRS) Jack Plug
2
1
1=Ground/Screen
3
3=Cold(-)
Ring=Return Signal
Tip
Ring
Sleeve=Ground/Screen
Use for Insert Points
2=Hot(+)
(For unbalanced use, leave pin3 unconnected)
1+
2+
Speakon connector
Tip=Send Signal
2
1
1=Ground/Screen
3
3=Cold(-)
Use for Main output
3-pin XLR Line Socket
(seen from soldering side)
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