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Message: <blockquote data-quote="SQChevy" data-source="post: 2925315" data-attributes="member: 565530"><p>If you don't have a capacitor and you are constantly using the sub heavy and hard it will cause your alternator to run at full speed and sometimes your system will try and pull more than it can provide.  If you do this long enough your alternator will go out and in rare cases it can cause the alternator to catch fire.  (Personal experience from idiots at Best Buy)  It is there to keep the amp in power when it sub hits hard.  During times when the amps are using a lot of power the capacitor will charge.  I have around 2000 watt system and have a 200 amp alternator and I hardly get any drop in voltage in my system.  I used to run a cap, but I didn't need it and it causes some noise in the system.  Nothing extremely noticeable, but considering it's a competition vehicle it needed to be taken out.</p></blockquote><p></p>

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