First, thanks for looking in and I hope I can get an answer to a simple question.

I'm rewiring my HT system and have a question about cable Gauge wire. right now im running Monster XP cable which I think is 14-gauge, but not sure. In all honesty, does going to a higher gauge, say 12-gauge make that much of a difference? The total cable runs will not be longer then 15 ft a piece.

Thanks in advance