OP a solution to cancel or at least improve the acoustic glare caused by a flatscreen tv on the wall behind the speakers?
In my experience, sonic glare/ brightness/irritation mostly are from speakers, source (CDP, DAC, etc), and cables. The sonic irritation isn't by the screen. Removing TV won't make the meaningful difference and no one will be satisfied with it. On/off the panel each time is burden for small difference. Watch below where the most glare comes from. All your audio systems behave/sound like the left speaker, except Wavetouch audio. Alex/Wavetouch