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<blockquote data-quote="helotaxi" data-source="post: 2437791" data-attributes="member: 550915">There are places for a cap.&nbsp; The typical noobs system isn&#039;t the place.&nbsp; A cap can help with small voltage dips during transients.&nbsp; For long droning notes it&#039;s worthless unless you have the HO alt to go with it.lincolnls- I didn&#039;t understand your first post either.Adding a second battery can help with voltage dips and prevent light dimming all together.&nbsp; Batteries don&#039;t make power they store it true, but they store a LOT of it.&nbsp; If you decrease the resistance between the storage unit and the thing drawing the current the voltage loss between the two is minimized.&nbsp; The battery in the back also keeps the amps from trying to draw power during transients from the front battery and alt because the resistance in that current path is higher than the one from the rear battery.&nbsp; That keeps the voltage from dropping to the headlights and thus prevents dimming.Easiest way to add second battery is to simply run a wire (bigger is better) from the + on the front battery to the rear one.&nbsp; Fuse this wire next to both batteries.&nbsp; You can ground this either in the trunk or run a return line back to the front battery.&nbsp; If you have a high draw system, grounding back to the front battery with a large cable is probably a good insurance policy.&nbsp; The idea is to minimize resistance throughout the electrical system.If you have a system that draws a lot of juice all the time, going with a HO alt might be necessary, but really for the average system that is used to play music and the only times of high current draw are during music transients, the big 3 and an extra battery with adequate wiring is usually going to get the bases covered.&nbsp; In fact if transient dimming of the headlights is what you are seeing (volts dip when the bass hits but returns fairly quickly to normal) a HO alt probably will be a waste of money.&nbsp; The alt can&#039;t respond instantly to increased current demand and as such won&#039;t help fix the problem.</blockquote>

[QUOTE="helotaxi, post: 2437791, member: 550915"] There are places for a cap. The typical noobs system isn't the place. A cap can help with small voltage dips during transients. For long droning notes it's worthless unless you have the HO alt to go with it. lincolnls- I didn't understand your first post either. Adding a second battery can help with voltage dips and prevent light dimming all together. Batteries don't make power they store it true, but they store a LOT of it. If you decrease the resistance between the storage unit and the thing drawing the current the voltage loss between the two is minimized. The battery in the back also keeps the amps from trying to draw power during transients from the front battery and alt because the resistance in that current path is higher than the one from the rear battery. That keeps the voltage from dropping to the headlights and thus prevents dimming. Easiest way to add second battery is to simply run a wire (bigger is better) from the + on the front battery to the rear one. Fuse this wire next to both batteries. You can ground this either in the trunk or run a return line back to the front battery. If you have a high draw system, grounding back to the front battery with a large cable is probably a good insurance policy. The idea is to minimize resistance throughout the electrical system. If you have a system that draws a lot of juice all the time, going with a HO alt might be necessary, but really for the average system that is used to play music and the only times of high current draw are during music transients, the big 3 and an extra battery with adequate wiring is usually going to get the bases covered. In fact if transient dimming of the headlights is what you are seeing (volts dip when the bass hits but returns fairly quickly to normal) a HO alt probably will be a waste of money. The alt can't respond instantly to increased current demand and as such won't help fix the problem. [/QUOTE]

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