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Help with headlights when the bass hits
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<blockquote data-quote="audioholic" data-source="post: 7021310" data-attributes="member: 549629"><p>How large is your stock alt? 1600 watts is well over a 100 amps of draw at 12 volts. Yes, that's peak, but even the average draw over time will still be significant. If the discrepancy between draw and supply is great enough, adding a second batt will merely prolong the problem.</p><p></p><p>But all this being said, your personal listening habits also factor in to average current draw, how often the stereo is left on while driving to allow the batts to recharge, even by how far the owner's average drive time is. So if you learn nothing else form my post, its that answering the question of if you need an alt or not is very complicated, and virtually impossible for us to answer unless the discrepancy makes the answer obvious.</p><p></p><p>Adding the second batt, if you decide to do so, would be best placed in the rear, near the amplifier(s). Voltage drop will decrease due to those peak power demands from the amplifier drawing mainly on the close batt, providing less line-loss due to less wire between the power draw and a power source.</p></blockquote><p></p>
[QUOTE="audioholic, post: 7021310, member: 549629"] How large is your stock alt? 1600 watts is well over a 100 amps of draw at 12 volts. Yes, that's peak, but even the average draw over time will still be significant. If the discrepancy between draw and supply is great enough, adding a second batt will merely prolong the problem. But all this being said, your personal listening habits also factor in to average current draw, how often the stereo is left on while driving to allow the batts to recharge, even by how far the owner's average drive time is. So if you learn nothing else form my post, its that answering the question of if you need an alt or not is very complicated, and virtually impossible for us to answer unless the discrepancy makes the answer obvious. Adding the second batt, if you decide to do so, would be best placed in the rear, near the amplifier(s). Voltage drop will decrease due to those peak power demands from the amplifier drawing mainly on the close batt, providing less line-loss due to less wire between the power draw and a power source. [/QUOTE]
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Help with headlights when the bass hits
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