I have checked the community and I think this topic is not answered. With the sonos arc, sub and two era 100 setup, which are touching the couch and mounted on the wall, the direction of these should be against the TV or diagonally to the listener.
Aditional info:
Distance to sonos arc is 3,8m.
Distance between era 100 is 3m
Distance for each era 100 to listener 1,4m.
thanks for your answers and sorry if its duplicated.