I want to move the sound rack in my booth, but the speaker wires running to the FOH speakers have no slack whatsoever. I was wondering if it would be safe to cut off the banana terminator (I think that it is banana, I'm not sure) and extend them with some cheap unshielded speaker wire from wal-mart. I believe the current wires are shielded. In other situations, I have found speaker wire to be very tolerant to being extended by having the bare wires twisted together, but I have no experience with shielded wire. What would be the best way to extend these wires? FYI, there is no "adult" in the school system that I could ask, and the fire marshal has a tendency not to like to see bare wires, yet allows such things as doors that you cannot get out of when locked and the sound rack to be plugged in with a single 15-amp surge protector (the mains amplifiers are fused at 15 amps (2 of them), and the stage and booth monitor amplifiers are fused at 10 amps (3 of them) as well as one fx processor, mackie 24 chan mixer, tape deck, cd player, DAT tape machine, and eq)! This leads to my other question, what would be the best way to power this rack? And what is the likelihood that I can convince the school electrician to buy and install it?