What gauge speaker wire is best for car audio?
When you replace or run new speaker wiring, we recommend using: 18-, 16-, or 14-gauge wires for speakers. 16-, 14-, or 12-gauge wires for subwoofers.
How many watts can 14 gauge speaker wire handle?
And if we just go on the current capacity of such wire, a standard 14 AWG copper conductor is rated for 25A continuous, maximum. If feeding an 8 ohm load, the maximum power would be I^2R, or 25*25*8 = 5,000 watts.