Gauge for cable run between amp and subwoofer - AVS Forum
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post #1 of 2 Old 06-08-2012, 07:54 AM - Thread Starter
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I currently have an EP2500/4000 and a CS-18.1. They are together right now but I'm looking to move the amp into a cabinet. The speaker cable run will be 25-30 feet. I have a spool of 14ga in-wall cable which I understood to be OK for my 25-30 foot runs for the other speakers. My question is how much difference does it make that I'm now doing this for a subwoofer? There are so many more watts running through this thing, that it just seems small to me. But maybe it is fine, I have no idea.
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post #2 of 2 Old 06-08-2012, 08:54 AM
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14 gauge is fine, but if 10 gauge would make you feel better, get some of that.

Take a look at the table in the Wikipedia article at http://en.wikipedia.org/wiki/American_wire_gauge

14 gauge has a resistance of about 8.2 milli-ohms per meter, so your 10 meter run would have a resistance of 0.082 ohms. (10 x 8/1000 = 8/100 ohms)

10 gauge would briing it down to almost 1/3: 0.033 ohms.

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