monte carlo trouble

[marcusb419er]

my rear speakers in my Monte are making a funny noise. sound like the motor sound is going to the 6'9. but the fronts. are OK sound fine. just the back ones that do it. even switched speaker still the same.

anyone know what it could be

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[Shyne151 10+ year member]

Are they amped?

What year monte?

 

[Mark_ab 5,000+ posts]

A motor sound? Are you talking about alternator whine? As in, the whine increases the higher the RPM's go? You probably have a voltage differential in your grounds. It's the most probable thing. Reground your HU/Amps/Engine ground making sure they're as clean as you can get.