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<blockquote data-quote="retrojordans" data-source="post: 7265560" data-attributes="member: 630134">You obviously have a lot to learn about batteries and your car&#039;s charging system.You know there is actual math and science involved in this audio stuff lol not just guessing.7000 watts x 2 to cover for efficiency = 14k14k divided by average Alternator voltage output of 14v = 1000Since you won&#039;t be running test tones or burps you can divide that current draw of 1000 by 3 because on music, and not on max volume all the time, you won&#039;t be pulling 7k.Which = 333 amps.If you don&#039;t run at least 333 amps from your alt(s) you will begin to pull energy from your battery which is not good for your battery, alternator, amps, subs and more importantly your wallet..You need a 400 amp alt, a starter battery under the hood...E.g. Die Hard...Autozone nothing crazy..A battery isolator...and a Series 31 battery for your system.That is it...If you will be burping with the car turned off like at a competition...Then you need sufficient battery capacity for the burps.</blockquote>

[QUOTE="retrojordans, post: 7265560, member: 630134"] You obviously have a lot to learn about batteries and your car's charging system. You know there is actual math and science involved in this audio stuff lol not just guessing. 7000 watts x 2 to cover for efficiency = 14k 14k divided by average Alternator voltage output of 14v = 1000 Since you won't be running test tones or burps you can divide that current draw of 1000 by 3 because on music, and not on max volume all the time, you won't be pulling 7k. Which = 333 amps. If you don't run at least 333 amps from your alt(s) you will begin to pull energy from your battery which is not good for your battery, alternator, amps, subs and more importantly your wallet.. You need a 400 amp alt, a starter battery under the hood...E.g. Die Hard...Autozone nothing crazy..A battery isolator...and a Series 31 battery for your system. That is it... If you will be burping with the car turned off like at a competition...Then you need sufficient battery capacity for the burps. [/QUOTE]

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