A:AnswerYes. I removed my old receiver and plugged the Amp into my speaker selector, and it worked perfectly. All speakers will play the same music is the only downside.
A:AnswerYou ca use this amp to power a pair of surround speakers that would work with your current Sonos Arc and subwoofer. The surround speakers would be hard wired to the Sonos amp and the amp will be configured as surround speakers for the Arc in the Sonos app. Very easy