I upgraded my internet connection to fibre to the property some months ago & the utility box & router are now located in the bedroom (centre of the house). I was online yesterday with Sonos Support & the only way to have the Sonos Connect work now was hard wired into the router. I have a stereo system in the living room consisting of a Marantz amp & Richter speakers + turntable where my Sonos Connect Gen2 used to plug straight into the amp. I have the Sonos controller on both my android phone & laptop. 

Sonos Support mentioned Line-In to connect. Can I & if so how do I play music to my amp & speakers in my living room using my Sonos Connect?