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Message: <blockquote data-quote="Firewalker" data-source="post: 8739340" data-attributes="member: 676743"><p>Usually it is, I've done both and have seen that sometimes when I get a whine through the speakers it is because of that ground not being right. Bolt it to someplace behind the dash and the whine goes away. Yet other installs I have had no whine so it all depends on the car and the quality of the grounds in it from factory.</p></blockquote><p></p>

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