I have had 2 12" Pioneer subs in a custom box ran by a Sony XPLOD 400watt amp in my standard cab 84 for a while, but just recently (tonight) discovered my stereos true potential as i accidentally set it on LOUD... And suddenly i couldnt see??? But my battery gauge was doing something very bad and jumping around alot. Am i draining all the juice out of my system? I could run it on 63% and my lights were TONS dimer than usual. I like the 'Thump, but also value my life and would like to see again. What could be causing this? Is it just a ground and i neednt to worry to much or is it really bad for this to happen?