I have a 05 Monte Carlo rear speakers sound dim does anyone know what the problem may be I already checked the speakers they are not blown when I turn the volume all the way up the rear speakers don't sound very loud can anybody please help me

 

Sounds dumb, but check to see if fader is set to front.

otherwise might be bad head unit or amp.

 

It's set to Center I think the amp may be blown my speakers are still good or maybe wiring harness is messed up