While I was loading up a trailer full of scrap Aluminum and Stainless Steel I came across about 200' feet of 4-12 cable and 150' of 3-12. Some of it is belden and others is name's I have never heard of. Anyway, it is 12awg all wrapped up in a thick black insulation. It says OK to bury, UV safe. It is all thick strand stuff, not like speaker cable, but is there any reason why I couldn't use this for my speakers? It would all be run through the walls so flexability and size of the cable and all of that doesn't really matter. I figured I could just run it through the walls and strip the black insulation off of it a few feet into the wall, attach some banana plugs and be good to go. Anyone? I was thinking if I ran the 4-12 to each of my surrounds I would have an extra pair of wires in the back by each surround that I could use if I ever go to 7.1 surround.