I'm at the point where i'm clueless on what my problem is. Let's start at the beginning. I recently bought a second amp for my front and rear fill and have for the past 2 weeks have been happily enjoying my quaint system. Today after hitting a couple balls on the range, I turned on my car, everything is normal, turn on my music, starts to play at a low volume, turn it up a little more and BLAM BLAM BLAM BLAM. My sub machine gun slaps at full potential and did not stop when i paused the song so i turned off the car. Turn it on, same thing x2. Drive home in silent fear.
Go home, hit up the old PC, and decide the best course of action is to check my wires and unplug my sub amp (sub amp is connected to speaker amp). Wires check out. Thinking it was some junky rca cables, I turn on the car, with just my speakers and start playing, turn it up, POP! BLAM BLAM BLAM! speakers stop play. Alright, It's gotta be the main rca Right? Check it with the volt meter, 0.00 , it checks out.
Plug rca into sub amp, only turn on car battery, sub works like a freakin' peach? wth?
Checked my head unit's pre amps and they measure .784 which i understand is ok.
tl;dr Sub rapid fires upon car turn on, rcas don't seem to be problem.