A:AnswerDepends on what you mean by ‘work with.’ The Amp is for when you want to may your own non-Sonos, wired, unamplified speakers, not for direct use with the any of Sonos Speakers. However, as with any Sonos product you could play music with your separately purchased speakers through your Amp and a Sonos One simultaneously by placing it in a different room and running them concurrently.
A:AnswerYes, Alexa is fully functional with the Sonos side speakers. I do not believe there is a microphone on the soundbar itself, just the smaller side speakers.
A:AnswerThe Five is better. Which makes senses. It’s bigger and costs $300.00 more. Fives can be paired with another Fives, and Ones with another One. The One is still amazing quality though, just make sure you set proper expectations if you are coming from the Five.
A:AnswerAny of our current speakers that support airplay two can be grouped with our older speakers that don't to then play airplay 2 through all of them.