Channel Plus MDS-6A 6-Source/6-Zone Music Distribution System: * 480W total power * Select up to any of 6 audio sources to * Distribute to up to 6 individual zones * Routed IR capability to allow multiple sources of the same model * Each zone has 40W of power per channel * On-board doorbell interface (requires accessory) * Cascadable to a second unit to provide up to 12 zones of audio distribution * Requires either the MPTMCS1A or the MPTMCS2A source controller