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Old 03-23-2015, 01:40 PM   #11
Special_K
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Join Date: Oct 2013
Drives: 2013 DGM BRZ
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Having done multiple high power audio installs over the years, I would not add 2 subs to this car without adding a new battery/alternator. The electrical output of both battery and alternator are not sufficient to drive two subs without significant power loss. Either tie in a second battery or install a deep load one.

A mild dip or headlight dim is manageable, but losing 500 rpm is some serious leeching that you need to sort out.
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