I've owned a pair of LS-90's for 11 years and should have figured this out by now.
They sound very good now, but there is always room for improvement.
I have them positioned approximately 4 feet away from the wall, and the left speaker is 2 feet away from the side wall that forms the left corner of the room. The right speaker is 8 feet away from the side wall tht makes the right corner of the room. The LS-90's are 8 ft apart from each other and toed in pointing to my listening position which is 15 ft. away from the center between both speakers.
They are standing over two stacked 13x13 ceramic tiles atop carpet.
Any suggestions on better placement?
If it imakes a difference to know, I have them by-wired to a 200 amp high-current amp and I mostly listen to 2 channel audio, (although they are part of a home theater set-up). On the left corner there is a Velodyne HGS-18 sub. Suggestions on positioning will be appreciated and experimented with.