ok i have 4 sa12's on a alpine mrx-m240 benched almost 2700 with a fuse rating of 175 amps. i also have a 4 channel treo engineering ssx40.4 amp i think fuse rating of 40 amps. well yesterday i went to my friends house and i was listerning to my system fairly loudly around volume 20 on a alpine headunit and the amp shut off (thinking the volts dropped to 10volts no lie) my gauge was moving so much. well i have a 200 amp alt i dont know what brand got it from my sundown dealer and a kinetic hc1800 battery. well i want this problem fixed asap but i dont know what to do where to even start. grounds, battery(s) i dont know thats why i need your help. oh everything is ran off of 0/1 gauge wire except to the treo 4 channel thats 4 awg wire. everything is fused. so please help thanks