I only suggested the shielded cable because if you are running unshielded down the wall you never know how close you may be to any electrical wires. (Interference) On two occasions, I have experienced interference in the line running unshielded cable down through a wall. So we ended up pulling the cable back out and replacing it with shielded cable and it worked like a charm!! Needless to say, you don't want to take a chance on having to re-pull the cable. (It is aggrevating enough one time!) I will say though that this is few and far between, and you may not have this problem.