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Message: <blockquote data-quote="Saint211" data-source="post: 6823072" data-attributes="member: 564903"><p>It will draw whatever is being outputted from the alternator which depends on RPMs.  Alternators always have power ratings.  There is an at-idle output and a peak output.  You come closer to the peak output at high revs while the idle is a continuous output at idle.  Whatever cont be produced by the alternator will be drawn from the batteries.  In a car application high-power is demanded during crescendos or heavy bass, but in lulls in the music or between heavy bass hits its not demanding full power.  This allows the alternator to charge the batteries up even if its not a high output alternator.  It has been my experience though that an alternator driving a system lasts a little less longer than a normal one though.  One can strain an alternator.</p></blockquote><p></p>

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