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<blockquote data-quote="Buck" data-source="post: 8767009" data-attributes="member: 591582">It&#039;s not quite a true closed loop.&nbsp; I just did it with the idea that the more batteries in between a frame ground and the amps would possibly result in less random feedback getting into the amps with the batteries maybe acting as a dampener in between them.The problem you&#039;re having with alt power at idle is a common problem.&nbsp; I faced the same problem in my Explorer, and I had a 300 amp alt charging at a set 14.8-15v.&nbsp; My alt only did like 60-80 amps at idle, something not very much.&nbsp; You could always get another alt.&nbsp; I had a Batcap 3000 up front and 3 sort of generic group 31 100ah batteries in the back, and I&#039;d still drop to the 12&#039;s or even 11&#039;s after a pretty short time if I didn&#039;t rev the motor up.&nbsp; Only 2400 w rated RMS, and it still did that.&nbsp; But at about 1800 RPM, I was playing high 140&#039;s across a pretty good bandwidth, and wouldn&#039;t drop below ~13.5v on the lowest notes (below 27 hz or so).&nbsp; Most notes would keep me in the ~13.8v range.Be careful over spinning your alt.&nbsp; If you engine revs high, then a smaller alt pulley could over spin your alt at high engine RPM&#039;s.&nbsp; From my experience, the higher your engine revs, the worse alt output you&#039;re going to have at idle.&nbsp; I&#039;ve seen some older HO alts not even turn on until like 800 rpm on some motors like Honda 4 cylinders because the alt wasn&#039;t spinning fast enough.&nbsp; So, I would check on the gearing ratio between your current crank and alt pulley, and see if the alt would over spin if you put a smaller pulley on there.&nbsp; Some alts have bigger pulleys on them for a good reason.I just turned the volume down a lot when I was at a stoplight or something.&nbsp; That&#039;s really the easiest solution haha</blockquote>

[QUOTE="Buck, post: 8767009, member: 591582"] It's not quite a true closed loop. I just did it with the idea that the more batteries in between a frame ground and the amps would possibly result in less random feedback getting into the amps with the batteries maybe acting as a dampener in between them. The problem you're having with alt power at idle is a common problem. I faced the same problem in my Explorer, and I had a 300 amp alt charging at a set 14.8-15v. My alt only did like 60-80 amps at idle, something not very much. You could always get another alt. I had a Batcap 3000 up front and 3 sort of generic group 31 100ah batteries in the back, and I'd still drop to the 12's or even 11's after a pretty short time if I didn't rev the motor up. Only 2400 w rated RMS, and it still did that. But at about 1800 RPM, I was playing high 140's across a pretty good bandwidth, and wouldn't drop below ~13.5v on the lowest notes (below 27 hz or so). Most notes would keep me in the ~13.8v range. Be careful over spinning your alt. If you engine revs high, then a smaller alt pulley could over spin your alt at high engine RPM's. From my experience, the higher your engine revs, the worse alt output you're going to have at idle. I've seen some older HO alts not even turn on until like 800 rpm on some motors like Honda 4 cylinders because the alt wasn't spinning fast enough. So, I would check on the gearing ratio between your current crank and alt pulley, and see if the alt would over spin if you put a smaller pulley on there. Some alts have bigger pulleys on them for a good reason. I just turned the volume down a lot when I was at a stoplight or something. That's really the easiest solution haha [/QUOTE]

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