my friend is looking to set up his home theater. i recommended he do the 5.1 system which consists of 2 play 1s, 1 playbar and 1 sub. can he connect 2 more play 1s to the tv system as opposed to them being grouped to the tv? would that even work? can it work without having to group 2 additional play 1s to the sonos 5.1 system?