my friend got screwed by some stereo place giving him a sub and charging him $100 over price and a 4 channel amp with the single sub. well, he wants to get more power out of it... hes got the sub hooked up to just 2 channels bridged.
is there any way to use all 4 channels together to power the sub? such as bridging channel 1-2=A and 3-4=B then running A & B to the sub? Its just a standard 4 channel amp, nothing fancy, i'm guessing the normal min impendance of a 4 channel amp, and 80 watts a channel i think?
i'm running off limited info, just wondering if theres a way to use all 4 channels for the one sub, safely.