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when i hooked up my new rear speakers and some extra front speakers(will show pic of what i mean later) i turned up the gain a little on my t400-2 and now when my sound is turned down the inside over my car sounds like a turbo blow off when i drive and shift. is this cause just by having the gain to high or what
 

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Is it a high pitched whine that varies with RPM?
 

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You didn't answer my question. :laugh:

If it's a high pitched whine that varies with RPM, that is called alternator whine, and is usually caused by running the power cable and RCA cables next to each other.
 
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