The rcu104 receiver coordinator allows for expanded coverage area and use in adjacent rooms. The rcu104 is a 1U rack mounting unit that receives the data streams from up to four drm141 Digital Receiver Modules and creates a single data stream that can be interpreted by up to two linked aci707 Audio Control Interface devices. The rcu104 also allows adjacency, permitting a single SpectraPulse system to be shared by two closely located or co-located audio systems, in side-by-side conference rooms, for example. Another rcu104 benefit: the rcu104 enhances microphone/transmitter performance. For each connected drm141, the rcu104 Receiver Coordinator Unit also manages Ultra Wideband pulse timing, data coming from the aci707, and the correct programming of encryption keys.