Flatscreen between speakers

@newton_john. 
You are correct. My choice of words was incorrect. I hope my meaning wasn’t lost in translation. My point is that the image is not a magic trick but something that can be explained, manipulated and repeated. In other words, it’s physics not voodoo. 

I asked Google Gemini for treatment options. One of the options was using sound absorption to the left and right, behind and below the wall hanging TV.  I used 24x48x2 panels (thicker panels would not fit behind TV) extending behind by 3” & below by 5”. Gemini claims this largely mitigates the problem. 
It recommends experimenting with speaker distance (mine are 30” out) from rear wall and ensuring there is no resonance from the TV & mount. Since the bottom of the TV rests on the absorption panels, that should help mitigate any resonance. 
Lastly, it states ’if you want to go the extra mile’ try placing thin removable panels or dense velvet/felt over TV during critical listening. Hope this helps. 

@signaforce. 
Funny, that’s what I have now currently. It’s not doing a lot but seems to be better than nothing. I am very close to something (2 days tops). I will tag you when I get it up. Thanks. 

I’ve always been more concerned about the internal loudspeaker of the TV resonating in sympathy with the sound in the room. My acoustic guitar does this when not in use so I dampen the strings with a soft cloth. Removing the surround loudspeakers from my listening room improved stereo performance.

Unless the stereo loudspeakers are toed in sharply and have front baffles close to the front wall or the TV projects out a long way, I can’t see how mid range and high frequencies that might cause problems could directly reach the screen.

@newton_john Although I no longer have a TV between speakers, I did for several years, and it was quite close to the wall and above the main speakers.

Covering the TV significantly improved stereo imaging.

I also have an acoustic guitar in the room and it never occurred to me that it could be resonating - I just had a listen and it most certainly is - a lot! - but damping the strings made no difference. Not surprisingly, the resonance is from the body, which is essentially a Helmholtz resonator. THX!