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<blockquote data-quote="MuTaLiZeD" data-source="post: 4977125" data-attributes="member: 600947">yo yo! Its my first post and glad I found a forum like this! Anyways I own a 2004 grand prix GT. I have two Diamond Audio D3 12&quot; woofers installed and a Kenwood 1800 watt class D mono amp for the power. I also just installed a TKO 1.5 Digital cap to help with the power. My problem is after 10 minutes of use the subs will dim low, and maybe a 1 minute or 2 they will come back louder than ever. Yesterday did a little lookin under the hood and noticed the tensioner for the belt was shot, so I replaced that and my belt is tighter than ever and hopeful of it fixing the issue. Well that is a big NEG. My cap doesn&#039;t get any lower than 13 volts and idles at 14.2. It has the stock alternator due to apparently&nbsp; there is a HUGE difference from the 03 to 04 models and they aren&#039;t out yet even 4 years later. The battery is stock but still reading out perfectly. I haven&#039;t done the big 3 simply because I really have no idea what I need to do it. I had all this in 2003 cavalier and never did this with stock alt and batt, and this has a bigger amp alternator then the cavalier. The stock Grand prix alternator is 125 amps btw. Any input would be much appreciated. Thanks everyone!Brandon</blockquote>

[QUOTE="MuTaLiZeD, post: 4977125, member: 600947"] yo yo! Its my first post and glad I found a forum like this! Anyways I own a 2004 grand prix GT. I have two Diamond Audio D3 12" woofers installed and a Kenwood 1800 watt class D mono amp for the power. I also just installed a TKO 1.5 Digital cap to help with the power. My problem is after 10 minutes of use the subs will dim low, and maybe a 1 minute or 2 they will come back louder than ever. Yesterday did a little lookin under the hood and noticed the tensioner for the belt was shot, so I replaced that and my belt is tighter than ever and hopeful of it fixing the issue. Well that is a big NEG. My cap doesn't get any lower than 13 volts and idles at 14.2. It has the stock alternator due to apparently there is a HUGE difference from the 03 to 04 models and they aren't out yet even 4 years later. The battery is stock but still reading out perfectly. I haven't done the big 3 simply because I really have no idea what I need to do it. I had all this in 2003 cavalier and never did this with stock alt and batt, and this has a bigger amp alternator then the cavalier. The stock Grand prix alternator is 125 amps btw. Any input would be much appreciated. Thanks everyone! Brandon [/QUOTE]

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