Hi, Need some advice. I am in the process of installing some speaker cables. I am running these under the floor boards by drilling a hole at one end and another one at the oposite end and fishing the cable through. Question is, do I need specific speaker cable for this? I have read that you should use CL2 or CL3 cable for in wall installation. Although I am going to be running is under the florr boards where there is a gap of around 1.5 feet. Thanks. Alex.