The Russound MCA-66 Digital multi-zone controller amplifier provides up to six zones of distributed audio. Scalable to 36 zones, the MCA-66 provides numerous options to tailor every room in residential or light commercial distributed audio systems. A variety of input options have been engineered into the MCA-66 to connect up to 6 sources. AV source input options include 6 Analog, 3 Digital (up to 3 coax, or 2 coax and 1 optical), 1 paging and 1 Bluetooth extender connection. The Bluetooth connection allows the installation of the MCA-66 in an equipment rack while remotely locating the optional Russound BTC-1X Bluetooth receiver up to 300’ away in or near the room where the Bluetooth source will be located. Additionally, the BTC-1X improves audio quality through the high performance aptX audio codec. An RNET link allows for metadata transmission, linking multiple MCA controllers and connection to all Russound RNET Smart Sources like the ST1 AM/FM external tuner.