Amazon.com: Denon AVR-X2200W 7.2 Channel Full 4K Ultra HD A/V Receiver with Bluetooth and Wi-Fi : Electronics
Rear panel AVR-X2200W
denon hdmi board | eBay
Arylic Up2stream Pro V3 WiFi & Bluetooth Audio Preamplifier Board, Wireless multiroom/multizone Home Stereo HiFi Music Receiver Circuit Module with Airplay,Spotify.Remote Control for DIY Speakers