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what guage size wire would ya'll recommend for a 500 watt amp?
 

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lets just assume you're getting 20 feet of wires..then 4 gauge should be enough. usually it will support up to about 900-1100 watts RMS (depending on length also). 4 gauge should be plenty.
 

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The question really can't be answered accurately until you provide the particular amp, where it is going to be located, what car, and what you will be running off of it.

For a reference though, a 4 ga wire that is 18 feet long is good for at least 100A....you'd be hard pressed to find an amp draw 100A if it's only 500W.
 

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4 guage is fine...that's what I run
 
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