The only way to get them synced up is using RCA cables and enabling the receiver's Pure Direct mode (no processing and only allows front left and front right channels). Any other mode introduces perceptible delay. Using optical or coax for digital (which I would prefer) makes an even more noticeable delay, even when using Pure Direct.
I assume that the bulk of the issue here is the receiver, but think it's a pretty critical oversight on Sonos' part to not allow adding a delay for these sorts of situations. Has anyone had a similar experience with Sony? Am I missing something?
Best answer by Chris
Sonos would have to implement a delay on each of the other speakers (which becomes complicated as they you have to go and manually change the delay on every sonos speaker trial and error). It's something they have never been inclined to do (and it has come up many times before).