The Lehle Little Dual amp switcher pedal routes your signal via gold-plated relays to Outputs A or B. Outputs A and B can feed 2 different amps simultaneously, since the signal paths are electrically isolated by the Lehle LTHZ high end transformer — completely eliminating hum loops. Both inputs can be routed in stereo to Outputs A and B. In addition, the Little Dual guitar pedal also incorporates gold-plated phase-reverse and ground lift switches.