Or it the Swarm only effective scattered around the room?
@mglik If your mains make bass, I'd place the Swarms to the side or rear of the room. They are only a foot square and if the driver is facing the wall (and the sub is only 2 inches or so from the wall) then they can be innocuous in the room. The trick is that they are asymmetrically placed so as to have differing distances from the center of the room- in this way they will be more effective breaking up the usual standing waves that occur.