Hi, I want to get a 4-channel Kenwood Excelon X600F amplifier for my car. I'm planning on bridging the coils in an Alpine SWS-1043D dual coil sub rated at 300W and 4 OHM and bridging that on 2 channels of the amplifier giving the sub a 2 OHM impedance and 300W of power from the amp. On the...