I'm building an entertainment system for my "soon to own" Sony 57WV700 and I want to move my sub to the other side of the room. Going behind, up, over, and down will most likely be a good 50ft. Can anyone tell me if this will work and if so, what kind of wire to use? I was thinking RG6 Coax with RCA ends. So, how long can a sub cable be before it starts to lose it's signal or sound like a rock in a coffee can? Thanks Mike S.