The factory setting is 4 volts and you have the option of increasing the output to either 8 or 12 volts RMS. To change the factory setting, power the unit down and locate the twelve-position DIP switches on the mother board. The 8 volt DIP seting is as follows. From left to right U=up D=down position. DUDDUDDUDDUD. The 12 volt DIP setting is as follows: DDUDDUUDDUDD. Happy listening.
Brent
Brent