Alternator Whine

[Jmoney3318]

Hey wussup guys im new here and wondering if maybe you guys could possibly solve my Sound System problem, i drive a 2002 Pontiac Grand am, and when i have everything hooked up and start my car i get a high pitched whining through the speakers, but then when i turn the car off it sounds fine and while the car is running and i rev the engine the noise gets louder as the RPMs go up, ive noticed that when i discconect my RCAs which are connected to my crossover the noise goes away, but when they are back in the Whining noise comes back, any idea would be helpful.

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[dkguitarist 5,000+ posts]

search.

also, find a common ground for your amps, ground your headunit to the chassis/frame or run it to the battery.

 

[squeak9798 5,000+ posts]

Likely a grounding problem. Either with your headunit or amplifiers or other externally mounted device.

 

[Jmoney3318]

Alright i was wondering when grounding the amps, can you use like any screw already on the car itself or is it best to create your own grounding point?

 

[squeak9798 5,000+ posts]

Depending on what type of power you are running, it's generally best to install your own ground. Be sure to sand away any paint/grease/etc so that you only have bare metal, and use a larger sized bolt for actually connecting the ground to the vehicle body.