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Message: <blockquote data-quote="winkychevelle" data-source="post: 7695584" data-attributes="member: 611804">amp gain knobs very by amp so the labeling isnt normally pin point accurate. but you may have a setting on the radio like the bass level set real low causing a lower voltage to be sent to the amp.for instant my alpine is 1-15 for bass adjustment at 1 i get .4v on a 50hz sine wave were as at 15 i get 4.3v which since my deck is rated for 4volt outs i use the setting of 15 to set my amps gain then i turn it down to where i find is comfortable to listen.</blockquote>

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