ART COOLSwitchPro - Isolated A/B-Y SwitchThe ART COOLSwitchPro A B Y Switch with Isolation is a handy foot operated box that lets you switch an instrument signal (guitar, bass, or keyboard) to either of two amplifiers or amp channels, A or B. The "Y" function sends the input signal to both the A and B outputs in parallel. 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 isolation