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Message: <blockquote data-quote="rbfb2101" data-source="post: 6532244" data-attributes="member: 612243">update:went to a car audio shop today and they bench tested my amp and said it was good. they also said the pre filter things are crap. the guy wasn't sure what the problem could be without looking into it more heavily which i didn't want to pay for.i went home and changed it from bridged to just one channel and the noise was cut in half. it's a lot better but still hear the whirring noise enough to annoy me. i also noticed that i only hear the noise when the rca cable is plugged into the L on the amp. i can plug either RCA cable, L or R, into the L on the amp, and  only get the noise from the L.so, any ideas now?</blockquote>

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