The Radial Engineering Relay Xo is an audio switcher designed to route balanced mic or line-level signals between two separate destinations, with the ability to be operated remotely with an optional JR-1 footswitch.
The Relay is basically a 1-in, 2-out straight-wire switcher for balanced audio.There is no transformer or buffering circuitry in between the input and outputs.This means the Relay Xo can not introduce distortion or noise into the source signal and allows it to be used with mic or line level sources. A link feature allows multiple Relay Xo units to be combined and switch stereo or multichannel audio systems. Switching can be done on the Relay Xo, via remote footswitch or by MIDI contact closure.
When artists employ wireless microphones on tour, the receivers are typically located off stage. The remote input on the Relay Xo allows it to be connected next to the wireless receivers to reduce cable clutter, while still providing control to the artist on stage with a remote footswitch. Two versions of the Radial JR1 footswitch (sold separately) are available for use with the Relay Xo; the JR1-M with a momentary switch that will activate output-B as long as the footswitch is held down, and the JR1-L with a latching switch that will hold on the last selected output.