my t15004 all of a sudden started cutting out, i've ALWAYS been able to turn it really loud, my gains are set very low. all of a sudden last night, i cant turn it up more than maybe halfway the music cuts out, the sub amps stay on though. I have a 300 amp alternator from EA. my ford factory starter battery up front(kinetik 2000in the mail) and 3 kinetik 2400's in the back. I decided to just check the voltages because what the hell I never have, so as i was testing i realized. With engine RUNNING, every battery is only at 12.6?!?! with engine off, the starter battery is at 12.6 and the 3 kinetiks are at 12.8. also, i put the multimeter on the amp terminals and turned it up, the voltage only dropped to 12.4 and the amp shut off. what the hells going on. someone please help?!