Here's my issue.
Whenever I turn off my car, or power down my head unit, my door speakers pop. This seems to be a direct result from the amplifier loosing power, as they pop exactly when the amp loses power.
What I've done:
1. Originally, due to me having a system on a factory radio, the remote turn on was still tied to the constant 12v from the cigarette lighter. I removed that issue and ran the remote turn on lead directly to the head unit. Oddly, that stopped the "popping" noise when the system gets power, but not when it loses power. Basically, instead of the speakers popping when the amp turned on or off, it now only pops when the amp turns off.
2. I also have a subwoofer amp, which I left connected to the cigarette lighter, but it's ran off a different switch. The subs do not pop at all. I took the remote wire from the sub amp and ran it to the other amp and the speakers still popped when the amp powered down, thus eliminating (in my mind) any issues with the remote wires.
3. If I remove the rca's from the input, I don't get any popping noise at all. The rear speakers, which are powered from the deck, don't pop. From what I can tell, my grounds are solid.
What steps can I take to check out the popping issue? Would a mix up in the polarity of the door speakers cause the pop?