The principle behind the A-BUS system is simple, fully integrated whole house audio that doesn't take up the space that a typical whole house audio system needs. No more worrying about where the rack will be located and no more messy nest of wires. Clean, easy, and concealed. The A-BUS hub is the core of an la carte distributed audio system that saves time and money. Sophisticated whole-house audio systems require a flexible point of origin, and the HUB4X8 Multi-Source Multi-Zone Hub is the optimum A-BUS control center. It accepts four source inputs and sends them to eight separate locations for amplification via the MTX VC2—up to four zones, with two rooms per zone. The HUB4X8 also sends power and audio to each room's volume control module (MTX VC2). IR repeaters permit in-room level adjustment of the original sources from any volume control around the house. Multiple hubs may be used to expand the system to more than eight rooms. Power supply included. Specifications: *Audio inputs: RCA phone jacks *Outputs: A-BUS ports: four RJ-45, IR: four 2.5 mm TRS jacks, Expansion: one RJ-45 *Wiring format: 568A *Dimensions: 1.2" H x 5.3" W x 2.4" D.