Play 5, Connect and Connect Amp all have line in inputs that allow a source to be chosen from the app and streamed over the Sonos network. All are current units. This means you’d put a record on, then choose ‘line in’ from the app and stream around the house. The only control you have if volume, of course.
Also worth noting the network port is two way, so you can connect a device to it and use the Sonos wireless network. For example my TV and Humax box are using my PlayBar as a wireless hub.
The only external input to a PlayBar is the optical in, but this upmixes into the 9 onboard speakers to make pseduo surround sound, so it wouldn’t work as a centre only. You can add rear Sonos speakers for wireless surround. Unobtrusive but expensive.
Davey – would you be adding other Sonos kit? For just one zone a Chromecast is a good alternative and vadtly cheaper. It will do multiroom now too and stream iPlayer, Spotify or Google Play from the app.
If you connect the deck via a Pre amp to line in on the Connect, as above, you can stream vinyl multiroom, which is cool.