I have a Russound MCA-66, DMS 3.1 Digital Media Streamer and BTX-1X bluetooth remote transceiver MCA-66 Product Link: https://russound.com/products/audio-systems/multi-room-controllers/mca-series-controllers/mca-66-6-zone-6-source-controller-amplifier 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. The Bluetooth connection allows the installation of the MCA-66 in an equipment rack while remotely locating the optional Russound BTC-2X Bluetooth receiver up to 500’ away in or near the room where the Bluetooth source will be located. https://www.audioholics.com/gadget-reviews/russound-dms-3.1-streamer The DMS 3.1 Digital Media Streamer will deliver up to 3 digital audio streams for whole home audio systems and installations.