ART Pro Audio
The 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 between the input and output signals. This helps reduce the danger of shock when the amplifiers are at a different potential. Also, this isolation, along with a ground lift function, helps to eliminate the hum caused by ground loops. A phase reverse function lets you make sure both amps are in phase.
The ART COOLSwitchPro is completely passive with true bypass and is housed in a rugged, stable case with industrial-grade foot switches spaced for easy operation. It will provide many years of reliable service, whether on stage or in the studio.
Basically this is the pedal you are looking for if you want to drive 2 amps at once, or when you want or even switch between 2 guitars and 2 amps.
STL Pro Audio is an authorised ART Dealer.
I brought this switch and it works great. Keeps noise to a minimum with great isolation and ground lift. However sometimes I have no idea how the "B" channel is switched do to no LED. However if you are going to have a fixed setting then this may not be required.