With a Sony Android TV.
I use Spotify to listen to music via the TV and can control the TV with my phone from the Goggle Home app or by voice with a Google assistant.
I only have one TV linked, but can listen to it in every room, tough it only makes sense for music (Spotify/Youtube/Tunein).
I use my Beomaster 5 to listen to the radio, I only need to hit the play button on one of the IR eyes I have in each room or on a beosound essence remote in others, it's just so much easier than turning it on the TV then selecting Tunein and a station, or even doing via phone or assistant, then selecting "TV" on the beo4.
I barely listen to CDs anymore, but the sound quality is so much better. I love the looks of the Beosound 5 and hope I can keep it longer.
I don't know if connecting all my TVs, with multiple 1611 would work.