As I posted when I bought my 340's, the speakers they replaced (Mission 761's) just couldn't image properly with the massive Entertainment Center between them. The 340's solved that problem and are now the mainstays of my HT.
I moved the Mission's to my study with a small (20") TV between them. It worked fine and I didn't give it another thought until this weekend. I needed to do some work on the window behind the TV so I moved it to a different spot in the room. This left nothing between the speakers. WOW! I'd forgotten how good these little guys were. Guess they just don't want anything in between them.
I'm sure Dave F. knows why the 340's can do what they do while some other quality speakers are so highly placement dependent but I can't explain it. I'm just glad I moved that TV.

David