Monster Power MPA 2250 Owner's Manual page 18

STEP 4 AC Power Connections
Monster amplifiers can be run at 115V or 230V. Verify that the voltage switch
is in the correct position for your location. In the US this should be set to 115V.
1. Set the AC power selector switch to the proper voltage.
2. Connect one end of the supplied Monster AC power cord to the MPA 3250.
3. Connect the other end into the wall or Monster Power Center.
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