In the first room I had my system in the sweet spot was incredibly small. A difference of inches and I'm typically not a fussy audiophile about this sort of thing but in that room it was as you say, you knew the right spot immediately and all others were noticeably worse. Even turning my head to one side made a difference in the soundstage.
In my current room the sweet spot is not so small and there are several of them. I don't know why. My room has a few hard flat surfaces but it has 10' ceilings, carpeted floor and soft furnishings everywhere else. Maybe that helps?
In my current room the sweet spot is not so small and there are several of them. I don't know why. My room has a few hard flat surfaces but it has 10' ceilings, carpeted floor and soft furnishings everywhere else. Maybe that helps?