or use a digital multimeter and put it on the speaker terminals and turn your music on your "special" volume number and measure the AC voltage then take that number times .707 to get your RMS output. You'll be surprised how many watts you're puttin out. A guy at a car audio store told me to use one to see how much power an amp is puttin out instead of those stupid test tones.
stupid test tones? I hope thats what you were playing while you measured the voltage otherwise you're going to have some pretty iradic and useless numbers. And no this is not a good test, i'm sure that amp could put out well more then it says, but its going to start clipping like a ***** and i wouldn't count that has a useable range of watts for that amp.
