Robert Harley suggests sitting "slightly" farther away from each speaker than the distance between the speakers.
http://www.avguide.com/hifibooks
You could try treating the wall behind you. I suggest panels at least 4" thick. ATS acoustics make cost effective acoustic panels.
My Quatros are a little more than 7' apart and I set a little less than 9' away from each speaker. This is actually what the Audio Perfectionist uses for his Vandersteen 3As, but I started out about 8' away and my Poang chair tends to drift back on the carpet, but the soundstage sounds good at this distance.
http://www.avguide.com/hifibooks
You could try treating the wall behind you. I suggest panels at least 4" thick. ATS acoustics make cost effective acoustic panels.
My Quatros are a little more than 7' apart and I set a little less than 9' away from each speaker. This is actually what the Audio Perfectionist uses for his Vandersteen 3As, but I started out about 8' away and my Poang chair tends to drift back on the carpet, but the soundstage sounds good at this distance.