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Message: <blockquote data-quote="helotaxi" data-source="post: 5138055" data-attributes="member: 550915">The cap is wired in parallel the amplifier, battery and alt.  There is no "in front of" and "after" the cap.  Putting the cap in parallel at any point in the system would have the same effect.  Don't believe everything that you read.Voltage ripple is also only present with the alt spinning (car running).  No SQ competition organization I know of has the car running during listening tests other than a test fro audible noise with a zero data track and that's a "yes" "no" test.  It's a simple matter to eliminate audible noise from the system without a cap, in fact a good amp will have sufficient capacitance in the power supply for that purpose.  Also consider that the power supply of the amp creates its own ripple and that would not be influenced by the cap at all...</blockquote>

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