A bit of history first.. About a year ago I noticed a problem with my Mach 460 system... It seemed like the system had lost it's punch. Not much base and siunded awful (It's debateable if it ever sounded "good"
So I did some searching and found a few threads suggesting that it was the head unit. So I replaced it with a unit and harness adapter I bought from crutchfield. Everything seems to be hooked up properly. It still sounds about as bad as it did whit the OEM head unit.
The front speakers/Tweeters sound just fine. However the rear don't. There is sound coming out but it does not seem like it's bening processed by the amps. Is that possible? Also when all was working well I distinctly remember that when I would first turn the car on, the radio would come on, then a second or 2 later the amps would kick in. That no longer happens. Could the amps be bad???