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<blockquote data-quote="loopkiller" data-source="post: 5480259" data-attributes="member: 601690">I highly doubt you are running 4/0 wire. Just so you know, that would be about 4 inches thick wire. You are probably running 4 gauge wire. Not the same as 4/0.I don&#039;t think it is your battery since it plays off the battery without any issues until you get to a high volume. That is to be expected out of a flooded battery.Yep.Did you buy the DMM (Digital Multi Meter aka volt meter)? If so, what are the following reading:1) Voltage of battery with key off2) Voltage of battery with key to ACC and audio on half volume3) Voltage of battery with engine running, audio off4) Voltage of battery with engine running, audio on half volume5) Voltage at amp with engine running, audio on half volumeSounds like to me your alt might be going bad. Either that or you have some really messed up wiring that I cannot even contemplate.Reply back with those voltages and I will keep trying to help.</blockquote>

[QUOTE="loopkiller, post: 5480259, member: 601690"] I highly doubt you are running 4/0 wire. Just so you know, that would be about 4 inches thick wire. You are probably running 4 gauge wire. Not the same as 4/0. I don't think it is your battery since it plays off the battery without any issues until you get to a high volume. That is to be expected out of a flooded battery. Yep. Did you buy the DMM (Digital Multi Meter aka volt meter)? If so, what are the following reading: 1) Voltage of battery with key off 2) Voltage of battery with key to ACC and audio on half volume 3) Voltage of battery with engine running, audio off 4) Voltage of battery with engine running, audio on half volume 5) Voltage at amp with engine running, audio on half volume Sounds like to me your alt might be going bad. Either that or you have some really messed up wiring that I cannot even contemplate. Reply back with those voltages and I will keep trying to help. [/QUOTE]

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