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.
It is usually located near the main sound system (Amplifier/Receiver, CD, DVD, Tape,
Cable, etc.). The HUB4x8 has 4 input and 4 zone outputs fopr a total of 8 rooms.
An expansion port (IN/OUT) allows multiple hubs to be connected to expand the system
for installations larger than 8 rooms (Power supply and remote included).