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Message: <blockquote data-quote="dipitydoo" data-source="post: 7447676" data-attributes="member: 567383"><p>i'm assuming you are have two batteries, then? its possible your alternator has trouble properly charging two batteries, which isn't too surprising.  if this is the case, then to properly charge both batteries, you would indeed need a larger alternator.  however, may i ask why you have the second battery?  usually, a second battery is good for longer playing time with the car off, or if you have a really large system, provided you can charge them properly.  if you were looking to maintain 14v to maximize the power from your amp, know that your jl amp has a regulated power supply, and power output remains constant between 11 - 14.4v, at the expense from increased current draw as voltage drops.  if you are looking to reduce dimming headlights, you would need to get a larger alternator.</p></blockquote><p></p>

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