I have a 800watt lanzar 2 channel and 2 600 watt 12" american pro subs. i have the amp wired from my fuse box right now. should i wire it from my battery to get max performance? what size of wire should i use 8 or 10 gauge? is this a good system. i'm going to get a Rockford Fosgate Punch 401S amp. would that be better than the one i have? can i bridge both the subs to one channel or will that ruin my amp? Please help me.