My M22's were about 2' from the back wall. I have a really deep room though, so I was able to push my couch back another foot. I was really shocked in the differnce pushing my couch back made. Before I moved back, the "sweet spot" was one very distinct place on my couch. If I moved to the right or left even a little the soundstage "collapsed". Once I pushed back a little further, everyone could enjoy the "sweet spot" because it was no longer a "spot" it was the entire area around the couch.