I have a bunch of 12 and 14 awg thhn or thwn lying around because I do electrical work and I am wondering if I can just use that from my amp to speakers because it will only be going 2 or 3 feet and I don't want to have to buy a 25 or 50 feet roll of 12 awg speaker wire. Also am is a 150 amp fuse enough for this 500w rms amp or should I get a 250 amp fuse?