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<blockquote data-quote="ColterDC" data-source="post: 7074510" data-attributes="member: 612869"><p>96 mustang GT with stock alternator, battery and mach stereo system. I believe the stock alternator is 110 amp.</p><p></p><p>Only added 1 12 inch sub with 1000w amp.</p><p></p><p>Battery voltage reads 12.75 with car off. With car idling it reads 14.6, but when I turn on the stereo the voltage starts dropping and will be at 14.4 within a minute or 2. I have not driven or let the car idle long enough to see how far the voltage continues to drop.</p><p></p><p>Would the big 3 solve this problem or do I need to do the big 3 and get a new alternator or do I have some other problem?</p></blockquote><p></p>
[QUOTE="ColterDC, post: 7074510, member: 612869"] 96 mustang GT with stock alternator, battery and mach stereo system. I believe the stock alternator is 110 amp. Only added 1 12 inch sub with 1000w amp. Battery voltage reads 12.75 with car off. With car idling it reads 14.6, but when I turn on the stereo the voltage starts dropping and will be at 14.4 within a minute or 2. I have not driven or let the car idle long enough to see how far the voltage continues to drop. Would the big 3 solve this problem or do I need to do the big 3 and get a new alternator or do I have some other problem? [/QUOTE]
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