Originally posted by SteedaSVTââ??¢:
Your not going to be drawing 170ish amps unless your playing extreme volumes...
Upgrade the big 3 and get another battery and you should be all set
Or playing test tones for SPL. Music will never reach levels like that. For extended playing time you may get some peaks, but the real draw is when doing a sweep or a constant low cycle (60 or lower) This varies by the subwoofer's Impedance curve.
As for adding a second battery, no need to connect it to the alternator. Just connect the front battery to the rear battery and then the amps to the rear battery. Just the postive wre needs to be run, ground each battery with the same gauge wire used to connect them.
Previous Owner of 00 SVT Contour #1077/2150 
95 Contour SE '01 3L 
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