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Message: <blockquote data-quote="MSUBlake827" data-source="post: 4782511" data-attributes="member: 596983"><p>Anyone ever have a problem using two ground loop isolators on same vehicle?  I installed one between my iPhone and my AUX in on the back of my headunit and then another one between my SUB OUT and my Input on my amp.  When both are hooked up I get the same engine whine with really bad feedback through my subs that wasn't there before the isolators.  But with just the one for my AUX in hooked up, there is no more engine whine.  What is causing this?</p></blockquote><p></p>

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