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Message: <blockquote data-quote="jrwalte" data-source="post: 4584350" data-attributes="member: 584454">depends on how loud you go and what you listen to (heavy bass).  Continuous 1000 watts at 13.5 volts would use apprx 85 amps on an 85% efficient amplifier.  Considering you want to go with 2 18s that are rated @ 1200 it shouldn't be that hard to reach near 1000 real watts.It's possible your amp will just shut off/fry due to huge voltage drops.  A high end battery under the hood and something like a Kinetik HC2000 in the trunk may work.If you like a lot of loud bassy music I would be prepared to need an HO alt of at least 120amps</blockquote>

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