The MXR Effect Pedals - A/B Box is the easiest way to route your instruments signal to two separate signal paths. Switch between two amps, or run them both at the same time with a Thru jack to connect an "always on"...

The A/B Box allows you to route your instrument's signal to two separate output amp paths, with a Thru jack for use with a tuner or other device meant to receive a constant signal. This pedal can be powered by a 9-volt...