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Message: <blockquote data-quote="shelbymann" data-source="post: 28449" data-attributes="member: 1337"><p>My car does it at 1900 RPMs like your video implies. I don't think it is speakers doing it as my vibration is only at 1900 RPMs so tied to engine "performance" not audio sounds. Does this make sense? Mine gets really loud now.  It is various auto trans gears as it will do it when going under 20. I see it pronouncedly going up a hill and my speed (usually 62) drops the RMPs to 1900 and it vibrates like hell from the humming noise.</p></blockquote><p></p>