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<blockquote data-quote="highfigh" data-source="post: 8881229" data-attributes="member: 691685">First, you can&#039;t measure Impedance with a multi-meter unless you measure voltage drop across the voice coil at each frequency- Impedance is frequency-dependent and that means it&#039;s Alternating Current, multi-meters measure DC resistance.Whatever power the amp actually outputs to the drivers, if you upgrade the + cabling, you also need to upgrade the negative cabling, or you can&#039;t possibly achieve the output you expect. A skinny 6 or 8 gauge ground wire from the battery can&#039;t possibly support the current the amp uses. I would contact Sundown and ask:How, exactly, did you supply battery power to the amplifier when it was tested. Stating 3500W RMS @ 1 Ohm is fine, but for how long and&nbsp; under what conditions?Tell them what you drive, what is included in your system, the alternator you plan to use and ask for their recommendations.</blockquote>

[QUOTE="highfigh, post: 8881229, member: 691685"] First, you can't measure Impedance with a multi-meter unless you measure voltage drop across the voice coil at each frequency- Impedance is frequency-dependent and that means it's Alternating Current, multi-meters measure DC resistance. Whatever power the amp actually outputs to the drivers, if you upgrade the + cabling, you also need to upgrade the negative cabling, or you can't possibly achieve the output you expect. A skinny 6 or 8 gauge ground wire from the battery can't possibly support the current the amp uses. I would contact Sundown and ask: How, exactly, did you supply battery power to the amplifier when it was tested. Stating 3500W RMS @ 1 Ohm is fine, but for how long and under what conditions? Tell them what you drive, what is included in your system, the alternator you plan to use and ask for their recommendations. [/QUOTE]

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