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Anyone know if I can use 18 Gauge speaker wire in place of 18 Guage SPT1? I'm not sure if the power will do anything to the speaker wire.  The Vamps should fit on speaker wire because its the same gauge right?  I'm asking because you can get double the amount of speaker wire for the same price. 

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Although internally both are the same gauge wire, the same can't be said about the wire's external insulation. Similarly you can get 18 gauge wiring for 12v landscape lights that is labeled "low voltage only" and I wouldn't use it for christmas lights or extension cords.

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