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Message: <blockquote data-quote="misfit138" data-source="post: 6675029" data-attributes="member: 611275"><p>If your vehicle has an 80 amp alt, you'll need to upgrade if you're interested in a moderately high powered audio system.  And the general rule of thumb for batts is 100 ah per 1,000 watts rms.  That's not a pinpoint accurate ratio, but rather a ballpark figure that many people stick to.  For example, if you're running between 1,800 and 2,200 watts rms you'll want a nice batt with an ah rating of 200 or so.  I'm sure some guys would argue with that statement, but I've never had a problem with it...</p></blockquote><p></p>

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