The Radial SW4 is a four-channel balanced audio switcher designed for wireless systems, mixing consoles, and digital guitar processors to provide backup or greater operational flexibility in a live performance or concert setting.

Each of the four channels is equipped with two XLR inputs and a transformer-isolated output that is capable of over +20 dB signal handling at all frequencies. This makes the SW4 equally viable for wireless mic systems as it is for switching high-output mixing consoles. Channels may be linked together for stereo, tri-channel, or quad switching, and additional SW4s may be linked for larger system requirements and remotely controlled if need be. Channel-1 is augmented with a 'mix' function that passively sums both inputs together for simultaneous use. All channels are routed to a master bus with 1 & 3 assigned left and 2 & 4 assigned right.

For monitoring, each channel is equipped with a 3-position PFL switch that selects between source A, source B, or the stereo bus via the built-in headphone amplifier. The bus may be switched to mono when used with wireless guitar systems. This is augmented with two isolated ¼" guitar outputs with a top-mounted 'set and forget' level control and a front-panel mono output to feed a monitor, tuner, or guitar amp.

These features combined make the Radial SW4 the ideal choice for backup systems and for switching multiple balanced audio channels simultaneously.