Combining the Ground Control with the GCX Guitar Audio Switcher forms a complete switching system. You can use each of the eight loops for in/out effect switching, A/B switching to select amps and preamps, or to control any type of foot-switch function such as amp channel switching. Add a mixer (like our System Mix Plus) to create a parallel effects system and use GCX loops to mute the inputs to your rack effects. This allows effects like delay and reverb to trail off naturally.GCX loops use no active circuitry, only the finest gold contact relays sealed in pure nitrogen. This gives the best possible reliability and tone. And GCX loops will add true bypass to any pedal effect to greatly improve tone when the effect is not being used.Click back panel for close-up Also included are two front-to-back feedthroughs, one with a very transparent, inline buffer. This buffer allows splitting to multiple amps and preamps, as well as reducing noise and loss of high frequencies from cabling. The GCX provides phantom power to the Ground Control over a standard 5-pin MIDI cable.