Originally Posted by RonRizz

you can set your gains with a multimeter.
RMS watts x resistance (ohms) then find the square root of the sum.
Thats your voltage output at the amp (with speakers disconnected) and head volume at 3/4.
O-scope would be the best way, but who the hell has access to one!! lol
Rms is a term that relates so the thermal handling capability of the driver at a continuous level.
Peak is a level that your driver can handle intermittently, as stated in other posts, and is typically double that of the Rms rating.