I’m trying to set up surround sound with only using sonance speakers. I don’t want a sound bar under my tv..  I’m going to have two sonance speakers on each side of the tv and 2 ceiling sonance speakers behind the couch.  Do I need two Sonos amps to drive the two sets separately? I assume so because the ceiling speakers will be ambient and the in wall speakers by the tv will be full.  Also, Do I need to connect HDMI Arc to each Amp if I need two or do I just connect to the wall speakers and then group the other set? I don’t know if when I set it up in the app it will be set up as a home theater or if I manually have to group the two amps together whenever I want to watch tv and adjust the volume separately. Any advice would be appreciated!