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Message: <blockquote data-quote="SPLaudio" data-source="post: 7384509" data-attributes="member: 607076">but with a stock battery and aftermarket battery fully charged you didnt smoke the sub from undervoltage in 3 mins of music off a1000rms.i tested by last car with the car off i could burp a 3k amp 7 times with 3 sec burps before my voltage would drop below 12.8 after a few sec rest.i bet one of ur batterys is bad. do you have them relay isolated? a good agm batt will rest 13-13.2v. a wet cell dosent like to rest as high and if not isolated they sit when the car is off and work against each other causeing battery damage...</blockquote>

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