I have my new Beam connected to my Sony 4K 55X850C TV with the HDMI ARC and find the output is very good on voices and general TV. When I turn Beam off say to use my audio system to play concerts from YouTube on the TV with the optical output going to the preamp, the optical signal cuts out. The only way I can get signal from the optical out of the TV is to lower the volume on the Beam to 0 and leave it on. I had a Sony HT-S100F soundbar connected through HDMIARC and when I turned that off, the TV optical out continued to transmit the signal. I can't find a setting in my Iphone X Sonos App to change that setting. I though it may be under room settings, but nothing allows me to turn the Beam Off whether through the App or speaker on/off switch without the TV optical cutting out.