HUB1X4 MTX A-BUS HUB, 1 Input, 4 Output

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 HUB1x4 has 1 input and 4 zone outputs with an expansion port (IN/OUT) so multiple hubs can be connected, to expand the system above 4 zones (PS included).