Yesh. I would contact Matthew. He is a room accoustics expert.\n\n\nSent from my iPhone using Tapatalk\n\nUpdate\n\nMethod: I moved everything around in my room. Removed the diffusers, pushed the TV back, removed the bass traps, moved the speakers forward so nothing was in front of them at all, heck, removed all of the couch cushions... I experimented with moving the room treatments behind the TV, behind the speakers, next to the speakers, everything I could think of. Also, a substantial amount of time went into unplugging SDA and testing without. Also, I moved my seat toward and away from the speakers to test the soundstage changes. Then slowly added items back.\n\nSource Material: I used that Cars Stereo Track and Dire Straights Private Investigation test tracks with the Eagles Hotel California Live and a Yosi Horikawa track called Bubbles.\n\nResults: Ultimately I could get the sound stage to be approx 1' to 3' to the right or the left of the speaker vs SDA off. Meaning it's working in some capacity but the speakers are still localizable. However, my expectations could be too high relative to my first impression. That said despite the left\/right expanded sound stage it was substantially more 3D. It was a "between the speakers" with SDA and didn't have a lot of the Z axis (between me and the speakers). I don't like using terms like that but that's what the effect offers.\n\nRemaining items: order some additional amps off Crutchfield for testing. I think the Stereo store where it hit crazy good was using a Parasound or a Rotel (I requested one of them). I'm going to ask them to see which one it was. I doubt it's the amp but it's a super easy test. Outright remove the TV from in between (even if it's pushed back). Granted the TV has to be there in the end but it will give me insight. I may even try a dedicated pre-amp for academic purposes.\n\nQuestions: The outer speaker is the one that is the SDA, correct (just making sure I have them correct)? Does 1' to 3' seem normal or a touch weak for soundstage?