All good points. Some professional monitors have adjustable settings for wall boundary placement. The ATC SCM9 doesn't seem to be a studio monitor, and has no adjustable settings. Regardless of it's size, it has a response that would make me inclined to put it near the back wall, with or without wall treatments.
Here's a couple quotes from their website:
"Zero Reflection Technology is powered by Quantum Acoustics
™, rendering all hard surfaces inaudible: walls, ceilings, floors, windows, doors."
"Without reflections
, acoustical issues simply cease to exist."
Without giving up any trade secrets, they could prove with measurements that a room treated with their panel had greatly reduced reflections by showing that all the acoustical issues were cleaned up. This would be as easy as demonstrating that the bass response was flat and smooth everywhere in the room with a single speaker playing anywhere in the room. That would be phenomenal and I guarantee we'd all be exceedingly impressed and recognize him as someone who knows something unknown to the rest of physicists. He'd have instant military contracts. (Maybe he does!) All new anechoic chambers would be built using these things. (Doesn't look like it.) But there's no point in pushing on this because if you read carefully it doesn't really say that the actual panels will result in zero reflections, but just implies that the underlying technology is theoretically capable of resulting in zero reflections. So basically they aren't saying just how well these panels work, only that they work to some extent, which Mr. Hsu has determined to make rooms sound good. His name recognition in the industry carries some weight, so major producers trust his judgement. And undoubtedly they do make rooms sound good.
Here's the only patent I found granted to Hanson Hsu:
https://patents.google.com/patent/US10240347B2/en?q=acoustic+absorber&inventor=Hanson+Hsu
I can't find any reference to anything quantum here, so the quantum part of the puzzle is apparently the trade secret. If I were trying to keep it a secret I wouldn't mention that it was quantum at all. I might be on to something here - maybe it has nothing to do with quantum effects. He's just using that to throw the would-be copycats off course.