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Message: <blockquote data-quote="charha01" data-source="post: 8702780" data-attributes="member: 678910"><p>I used the shorting plugs at the amp. I unplugged the RCA’s from the head unit and plugged in the shorting plugs on the amp inputs. The noise was gone. I then tried plugging in one set of RCA’s from the head unit and still noice engine noise on the speakers. I then plugged another set of RCA’s and the noise came back but much less of it. When I tried plugging all three sets of RCA’s the noise was back full again. Does this give anyone any info on what the cause could be. Does it sound like this is coming from the RCA’s?</p></blockquote><p></p>

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