Audio Ideas for a 86
#4
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You could try upgrading the existing speakers and add an amp without a sub. The sub is what would really kill the battery. I've got six in total; 6x9's under the sail panels, 4x6's in the dash and I added two 5 1/4's in the doors. It'll make a significant difference. An I haven't had a problem with the battery dying. Hope this helps.