I haven't had any problems for 2 years until now. I start the car and immediately I hear heavy static over the music. I listen to the stereo for a couple of minutes and then it's gone. So then i'll turn it up and I'll have low output from my sub amp until it's been running for a few minutes. Sometimes I'll even turn down the music after the low output and the static comes back.
I've checked my gain and haven't adjusted for 2 years. I've also checked my grounds and both are fine. I did unplug my RCA's leading to my sub amp and the static went away then plugged them back in and, presto more F-in' static.
Do I have a problem with my amp?
I have 2 12" L7's and a JBL 1200 watt GTO amp and a alpine 340 amp for my components.
sounds like something with your RCA's. My buddy was having almost the same problem. RCA's were pinched by something and as soon as he took care of that it went away.