I have had the same system for about two years. With absolutely no issues other than fuses. I'm running two fuses now two Kicker 150amps and haven't had any problems with them.
But last night I was bumping, heading to a friends house and my amp shut off. This has happened before but very seldom. Ever since that happened, my amp keeps going into protect mode when I increase the volume slightly. Even at low volume, it goes into protect mode.
My voltage according to my Stinger volt meter, avg's about 13.1 volts.
My system consists of: Four 12" Kicker Comp's, Pioneer Dash and Rear Panel speakers, 4000w Hifonics Amp (Bass), 600w Dual Amp (Treble), Two 3/4 Boston Acoustics Tweet's, .5 Fared Cap, Alpine Eq 3339, Alpine Headunit.
Nothing on the system has been adjusted for over two years. Could it of just went bad?