ART CoolSwitchPro Isolated A/B-Y SwitchThe handy CoolSwitchPro Isolated A B Y Switch from ART is a foot operated box that lets you switch an instrument signal (guitar, bass, or keyboard) to either of two connected amplifiers or amp channels, A or B. The "Y" function sends the input signal to both the A and B outputs in parallel. The switch selectable features on the B channel add versatility to the basic switching functions. A high quality audio transformer can be switched in to provide