Right, an mm should be the best way to figure this, but I'd rather know before buying and then finding out.Originally Posted by racerx3165
That formula should work, but for amplifiers it tends not to always follow that trend, for instance 14.4V at 40amps at 1 ohm should yeild 576W and 14.4V at 40amps at 2ohms should yeild 288W and 14.4V at 40amps at 4ohms should yeild 144W right? So it follows a linear relationship. However in most amplifiers I've looked at, their 1,2,4 ohm rated outputs do not follow that linear relationship so it must be something designed into the amplifier.
I suppose just using those three (1,2,4 ohm) rated outputs into a list on my TI83 and finding the regression which follows it the best(and runs through the origin of course) might be the best way to estimate.
Edit: ^^ forgot, the graph shouldn't run through the origin, obviously a higher number, based off the graph it looks like it should creates an asymptote at resistance = 0, so infinity i suppose.