I have the Sonos Connect Amp and four speakers in two rooms....a pair in each. The Sonos unit only has outputs for a left and right speaker, but what I did is run all my speakers into a simple push button speaker selector switch. That switch then becomes a speaker hub, and you can then send the left/right output from the switch to the Sonos. Then just hit the buttons for your three zones at the speaker switch, and you're good to go.