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Why the high pitch sound when rpms raise?

  #1  
Old 10-08-2011, 04:10 PM
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Default Why the high pitch sound when rpms raise?

Why is there a high pitch noise when the rpms raise? Is there a way to get rid of this?
 

Last edited by cb7sk8rdude; 10-15-2011 at 10:33 AM.
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Old 10-08-2011, 09:02 PM
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how close is your wiring run to the factory wiring? are the RCAs run with the power wire?
 
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Old 10-09-2011, 12:34 PM
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The wires aren't that close the the factory wiring. The RCAs have their own way to the battery, they don't use the power wire.
 
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Old 10-09-2011, 06:40 PM
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it is a common myth that running RCA's next to power wire will cause alt whine. it won't.

what causes alt whine is a ground loop. resistance between the HU and amp grounds cause this. this is a common problem with Pioneer head units due to an internal failure and open connection. also, head unit grounding is important, i ground head units to the floor to minimize resistance.

you say you checked your ground, but show us a pic. i find people don't know what to look for or what a good ground actually is.
 
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