The Radial Cabbone is a unique device that enables you to switch between two speaker cabinets using a single amplifier head. This, for instance, could be used to mount a Fender Twin on a 4x12 Marshall cabinet and switch between the two cabinets to enjoy the very different tonal characteristics of an open-back 2x12 compared to a closed-box 4x12 half stack.
Unlike a regular AB box that mechanically switches between two sources, the Cabbone actually 'ramps on' the switching process with a timed overlap so that the amplifier always sees a speaker load. This ensures both tube and solid state amplifiers are safely switched at all times. The audio signal is actually switched via high-power gold-contact relays to ensure 'straight wire' performance. In other words, the Cabbone will not color the tone or introduce any form of distortion into the signal path. Should power to the Cabbone ever be disconnected, Radial Safe-Mode™ operation automatically resets, connecting the head to output-1.