i disagree with some statement that grills affect to sound.
@bache I’ll completely defer to you and your considerable expertise, but it really does fly in the face of logic that putting fabric in front of drivers doesn’t affect the sound, especially in the higher frequencies. I know some manufacturers design their speakers to be used with grills, but they’re in the minority IME. That said, I noticed no imbalance in the sound of your room, which sounded great BTW especially given the room you had to work with. Definitely one of the better rooms I heard.