A:AnswerFor the “best” of the BEST home theater experience?? Yes!! Get 2 of these! Move the Sonos SL you have to another room and stream there. I’ll move m 2 SL Ones to our home office and put a pair of the ERA 100’s in the living room. So far, I’ve heard the bass response nearly eliminates need for the Sub Mini, but I’m tempted!!
A:AnswerYes. But if you're on the same network, you can also tell Spotify to cast to the Sonos speaker. Then you don't have to be close to the speaker to stream to it.
A:AnswerIt’s subject to what’s in your office (cubicles, pillars, file cabinets), but I’ve recently eaten a noisy restaurant with a large open space other than tables which had 100’s on the wall in the back corners.
You could hear the music reasonably well. And you could always add a couple more to the network if 2 weren’t enough.
A:AnswerI think the Era100 will connect to a Sonos (Arc?) soundbar as either a surround channel or as another separate zone. It doesn't 'connect' to the Era300s, only to a Sonos soundbar or a Sonos amp.