Hi, I have a samsung smart TV with Sonos sound bar, Sonos subwoofer and era300. I can only link the soundbar and subwoofer or the subwoofer and era300, not all three at the same time. 

I click on set up stereo pair and the set cup surrounds options but haven't been able to troubleshoot the issue. Do I require 2 of the era 300 speakers to work as surrounds/stero pairs? I was of the opinion I could have the TV with sound bar and subwoofer beneath it along with a era300 off to the rear side of seating area but perhaps this is not correct?

Appreciate any assistance.