Monster Power MPA 2250 Owner's Manual page 16

STEP 1B For Balanced XLR type connections.
1. Connect one end of the balanced XLR type interconnects to the preamp outputs of the receiver/preamp you
wish to use.
2. Connect the other end of the balanced interconnects to the appropriate channel inputs on the MPA 3250.
3. Set all Input Type Switches towards the Balanced Input.
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