Hahaha
A friend of mine actually said his was louder one day and not the next, and when I was adding bigger wire for a new amp he had rattled his ground loose which would make it do that..
I was gonna say, yesterday on my way to your house, I noticed the same thing, the same song getting louder at times. It was my bass knob shorting out, I unplugged it and it fixed the problem.
But damn the luck, I really loved my bass knob ;(
But yeah man, check all your grounds and rca's, and bass knob if you have one.
He shouldn't have any voltage issues, he's only running 500 rms.
Yeah I have a bass knob. So what do I do? Just unplug it and plug it back in? And what should I check form my RCA's?
And I believe I do actually. Sometimes voltage drops to a whopping 11.8. Cuz I believe that my stock alt does only 120 amp or less