Can someone tell me what the difference is between Polarized Speaker Wire and just speaker wire, as sold at Radio Shack? They sell spools of the stuff in 20, 50 and 100 ft. lengths. And is 16 ga. wire sufficient for hooking up the Rears for an inexpensive RCA HTIB (model RT2360/2370)? I don't want the wire to be so thick that I can't tuck it into the carpet along the edges of the walls but I don't want it to be so thin that the speakers can't get the juice they need. I will be using 14 ga. for the Mains, Centre and Sub (no RCA jack for the Sub). Thanks.