Anyone have experience with this system? I walked a house today that had this system. Main unit in kitchen, and intercom stations in each room. These rooms then have ceiling speakers which music feeds through from the intercom system. The only manual I could find online explains how to use it. What I want to know is how it wires. Is it akin to an abus system with the intercom in each room serving as a local amp? Do speaker wires run back to the main unit? I've never experienced an intercom system that also included speakers separate from the intercom components before.