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<blockquote data-quote="Kangaroux" data-source="post: 8299198" data-attributes="member: 628495">Like I said before, I don&#039;t think you understand the purpose of the batts. In electronics, when you have multiple power sources, the one with the highest voltage will be drawn from first. Since your alt puts out 14v vs. 12.8v on the batts, it will pull from the alt. Adding more batteries won&#039;t hold your voltage at 14v, since your amps will always pull from the alternator first. The only thing adding more batteries will do is provide more stable voltage when the alt can no longer keep up (aka youre drawing more power than it can put out)EDIT: I also should mention that even if your amp is 3,000w, that&#039;s not how much you&#039;re going to be getting. Speakers don&#039;t have a fixed resistance (hence why you hear the word impedance). Your box will change this resistance and cause it to rise. Your 1 ohm sub might rise up to 2 or 3 ohms, and you won&#039;t be drawing 3,000w. 320A honestly would be enough for a 5k amp.</blockquote>

[QUOTE="Kangaroux, post: 8299198, member: 628495"] Like I said before, I don't think you understand the purpose of the batts. In electronics, when you have multiple power sources, the one with the highest voltage will be drawn from first. Since your alt puts out 14v vs. 12.8v on the batts, it will pull from the alt. Adding more batteries won't hold your voltage at 14v, since your amps will always pull from the alternator first. The only thing adding more batteries will do is provide more stable voltage when the alt can no longer keep up (aka youre drawing more power than it can put out) EDIT: I also should mention that even if your amp is 3,000w, that's not how much you're going to be getting. Speakers don't have a fixed resistance (hence why you hear the word impedance). Your box will change this resistance and cause it to rise. Your 1 ohm sub might rise up to 2 or 3 ohms, and you won't be drawing 3,000w. 320A honestly would be enough for a 5k amp. [/QUOTE]

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