I'd like to correct myself a little. One can input an analog signal into a Sonos Zone player that can be distributed amongst the other zones, so it's not an entirely closed system in that regard. But doing that one also looses a lot of the elegance of the Sonos system. Also in those other zones one would be limited to either playing internet radio and other music services, or what ever is feeding the analog input say the output of the Dac that's being used with the say the W4S music server.. It's not a very user friendly approach and certainly diminishes the beauty, and simplicity of what Sonos is all about.
So again maybe I'm confused since you didn't specify if the goal of this system for you is just a single room system, or the ability to do multiple rooms? If the plan is just for a single room than there's really no point in having a Sonos system since the W4S unit really just duplicates the same functions, abet less elegantly than the Sonos.
Maybe explaining my system will add clarity. I use a PS Audio PWD/Bridge ( similar in concept to the W4S unit, although I use a NAS for storage) in my main system so I can listen to high res downloads and because the PSA system just sounds amazing. I also have running side by side in that room a Sonos Zone Player, along with four other zones in the house. I keep a Zone Player hooked up to the PWD in the main system so I can play the same music synchronized throughout the house for parties.
In any case good luck I'm sure you'll get it all figured out and configured the way you want.
So again maybe I'm confused since you didn't specify if the goal of this system for you is just a single room system, or the ability to do multiple rooms? If the plan is just for a single room than there's really no point in having a Sonos system since the W4S unit really just duplicates the same functions, abet less elegantly than the Sonos.
Maybe explaining my system will add clarity. I use a PS Audio PWD/Bridge ( similar in concept to the W4S unit, although I use a NAS for storage) in my main system so I can listen to high res downloads and because the PSA system just sounds amazing. I also have running side by side in that room a Sonos Zone Player, along with four other zones in the house. I keep a Zone Player hooked up to the PWD in the main system so I can play the same music synchronized throughout the house for parties.
In any case good luck I'm sure you'll get it all figured out and configured the way you want.