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Old 01-11-2017, 01:11 AM   #2
basicxj

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http://www.sonicelectronix.com/item_...RX1516.1D.html

^^ is that your amplifier?

If so, it can pull up to 140A at full output so an 85A alternator won't cut it, and as you've experienced you'll get voltage drops.

If your alternator is toast, it could have pushed it over the edge- get it tested to be sure. If you have to replace it and plan on continuing to run a power hungry amplifier, an HO alternator would be a good investment for whatever extra it costs to upgrade. Be aware that some HO alternators can actually put out less than the stock one at idle, so checking specs and getting one that doesn't need high RPMs to make sufficient amperage would be a good plan of attack.
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