An ABY pedal is a type of switcher used by musicians to route the signal of their instrument to multiple destinations. Typically, it allows a guitarist or bassist to send their signal to two amplifiers (or other effects) at the same time, using the A/B or Y setting.

• A/B: The pedal allows you to switch between two separate signals, often used to alternate between different amplifiers or effects chains.
• Y: The pedal simultaneously splits the signal to both outputs, allowing you to run two amplifiers at the same time, which can create a wider, more dynamic sound.

ABY pedals are particularly useful for players who want to blend the tones of two amplifiers, or those who need to switch between amplifiers in a live setting. Many ABY pedals also include ground lift switches to prevent hum or noise caused by ground loops, making them a versatile tool for achieving creative tonal possibilities without added interference.