i have a yamaha P3200, and i was looking for using the bridge function. it says that when in bridge i should be using 8-16 ohms. my cabs are SWR goliath jr and a yamaha 1x18m both 8 ohms. so connecting both cabs resultas 4 ohms, right? is this to low for the P3200?? what alternative do i have? also, if it could be done, what should i look after? having a good electrical instalation in were i play? leaving a 1 space rack above the power amp? also, since i wont be using my crossover, cant i damage the 2x10 with extreem low freqs? or do the net inside the cabs will prevent this? if so: will i get more power and headroom using mthe bridge mode or running the it in stereo with the crossover? thancks!