Bobby told me that VSMs should ideally be 7.5' or more apart and at least 9.5' from the listening position. I have tried them in other positions and conclude that in my room, pinpoint imaging is still possible and embodiment is improved when the speakers are 8' apart. My room is 16'x16'x8'H; I believe this is about the smallest room that allows you to adhere to the above guidelines, while bringing the speakers out from the front wall as needed to produce a reasonably deep soundstage. But I'm sure the VSMs sound good in smaller rooms as well.
Dave
Dave