Is there an advantage to using shielded Cat-5 wire?
The AudioControl Active Balanced Technology products run signals as a balanced signal over standard twisted-pair wire (commonly found in Cat-5). For this reason, a shield is not necessary. Should you be using wire with a shield, be certain that it is only grounded at the Receiving end. This will act as a drain.
Do not connect the shield on both ends! Doing so will cause a ground loop and hurt performance.