how do i calculate power from my amp. if i have my sub wired at 1 ohm and i play a test tone say 60hz and measure the voltage how do i calculate that into watts. i know you multiply volts by current to get watts but how do you know the current at diffrent loads. not sure if im missing something i just always see people say i measured this many volts at this load so it is putting out this many watts and i never see a current measurement. is there a standard current output per load or something. just want to learn a little more thanks

u need a DMM for voltage and an Ammeter for current.

i have a dmm so i can test voltage just wasnt sure if there was some formula for current never seem to see anybody mention measuring current even though its the other half of the equation

are you just trying to figure out how much power it is actually putting out? zed audio will do tests, I think the cost is around $100 though