Please note that I cannot do the other way around, which is linking Sonos Connect output to amp input, due to the nature of my set up.
Best answer by AjTrek1
Sonos speakers are always on they just go into a low power state when not receiving a signal. If you intergrate a Sonos Connect with your AVR via line-out from it to line-in of the Sonos Connect you have two choices:
1. Group the Sonos Connect to other Sonos speakers and play music to them from a source connected to the AVR and leave the group in tact after you're done.
2. Group the Sonos Connect to other Sonos speakers and ungroup them after you done playing music from a source connected to your AVR. You'll have to re-group each time.
In either scenario you'll have to set the line-in of the Sonos Connect to "auto detect" in order for play back to start without your interaction.