Corelli, the transducer centers are a 1.5ft from the side walls and 2.5ft from the rear wall. I didn't move them durning testing because I'm not going to move them when I listen. So that would be pointless. They are positioned in front of corner Bass traps that extend from just off the floor, almost to the ceiling. The rear wall is also treated with flat panels below the HT screen and stop about 4ft off the floor with the screen above that level. I also have bass traps in the rear room corners and additional absorption panels at most reflection points on the side walls. I actually had more absorption panels at one point, but with experimentation discovered imaging and depth was better with some of them removed. Evolvist heard the DIs in my room, but later posted he hadn’t hear the DIs in a treated room. All I can assume is he wasn’t impressed with my sound absorption efforts and didn’t feel it was a good sample. Hey, I do what I can. It sounds pretty good to me and looks good on a graph. Imaging is great with the correction on or off and not a real noticeable difference in the low end. Mostly it seems to improve the image depth placement and adds a bit of detail in the mids and highs. The big thing is, it made a huge difference when I tested it with my B&W 804s. It was like night/day on them and brought them much closer to the sound of the DIs. It was pretty impressive. I guess it makes sense that the better the speaker, the less correction it needs. And the worse the speaker, the more of a change you’ll notice.