The EarthQuaker Devices Passive ABY Box is the perfect solution if you can’t decide when and where you would like your signal to go. In its most basic form, this passive little box is commonly used to run a single input out to two destinations and lets you choose between using either individually or both at the same time. The most common problem and ABY is used to solve is one input being sent to out to two amplifiers but it doesn’t have to stop there! Because of its completely passive circuitry it can also be used in reverse to choose between twoinputs to a single output.