I have paradigm studio 40's paired with a Primaluna prologue and an HSU sub. They are 8ft apart, 10ft from my couch - and on the floor. The 40's are bookshelf, not floorstanding, but every time I put them up on stands I loose so much of the sound - the separation, the soundstage and the mid bass. It's amazing how much the stands negatively impact the sound. But in theory, getting them to ear height should be an improvement. So what's going on here? Any ideas?