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Message: <blockquote data-quote="skdooley" data-source="post: 7611756" data-attributes="member: 627957"><p>Take the RMS you plan to run and divide it by the efficiency of the ohm load the amp will be running at. For instance, 1,000 rms. Lets say you run an amp at 2 Ω and the amp is 80% @ 2 Ω. 1000/0.80 = 1250. Then divide that by the charging voltage you're electrical is running at, say 14.4 volts. 1250/14.4 = 86.8. So running the 1,000 rms @ 2 Ω at maximum output (full tilt) you could expect to be pulling ~87 amps from your electrical.</p></blockquote><p></p>

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