A-BUS 4 Source, 4 Zone, 8 Room Hub.
The Versatile A-BUS Hub
The A-BUS hub is the core of the system. It distributes audio signal, system power, and status indication to A-BUS power modules installed in rooms throughout the home and sends IR commands from the power modules back to the source components.
The HUB4x8 has 4 input and 4 zone outputs for a total of 8 rooms.