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Message: <blockquote data-quote="Shanerator" data-source="post: 8528897" data-attributes="member: 671334"><p>i have a 3way alpine head unit and there is a problem when i connect both sub out and mid out to the amp esx 4120.. when i use only one rcas no matter where i put them on the head unit or on the amp, everything is ok.. All sort of combinations.. Singular rca always is zero engine noise.. BUT when i use two rcas at the same time, as a contrary, in every single combination i get very disturbing pitching noise which gets louder when i press tha gas pedal.. When i turn off the engine everything is ok.. So one rca everything ok, 2 rcas engine noise.</p></blockquote><p></p>

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