About a second after I turn off my car there is a popping noise as the system shuts down. Clearly audible but not real loud. I think it may have something to do with the 3sixty.3 problems I had. Some kind of power feedback?
current system,
I left the factory system in the car with only one center dash speaker because of the number of things that touch screen controls and does., nav, sirus link, ac/heat controls and even how lights work in the car, ect.
Current system mostly Rockford Fosgate ;
PMX-2 head unit because it fit in a spot I wanted to put it.
t2500 on 2 psi stage 3 subs
t1000.4 bridged for front doors pps10-4
t1000.4 bridged for back doors pps10-4
t600.4 for door tweets pp4-nt
t400.2 for dash memphis mojo tweets
3sixty.3
audio control in dash epicenter
audio control four:one
RF 10 farad cap
4/0 big 3 plus 2x 4/0 to trunk
Rockford and Knukonceptz wire
3x optima red tops
320 amp alt
Everything sounds awesome. The only problem is that pop when I turn off the car. I was hoping that would go away with the new head unit but it is unchanged.
I tried without the cap.
I made sure all grounds are good, bolts/nuts, scraped paint, tight everything with every battery grounded to the car body and the underside of that bolt going to a bolt in the frame with a 1/0 just to be sure. None of my grounds have over 5 ohms resistance.