A passive mixer for combining two microphones, or two speaker/microphones to one audio monitoring zone. It is mounted between the microphones and the Louroe Base Station. Has adjustment knob for microphone balance. The two microphones are combined for zone expansion and are not on separate channels. The RN-2 is phantom powered by the Louroe Base Station. NOTE: The RN-2 mixer does not provide two separate zones. It mixes two microphones to create a larger single audio zone.