How would that math translate into a multi channel amp? If you're running a 4 channel amp at 2.7 ohms, and the amp is rated at 120 rms at 2 ohms, 71 at 4 ohms...would you go by the 2 ohm number, 120 watts X 4 = 480, 480 X 2(ohms) = 960. 960 squared is 30.98, so set the gain at 31?