Every time I try it on my 5ACs, I end up turning them off soon after. My smallish room just doesn’t need the added brightness. It is 12 * 22 * 7, with a nook behind the basement stairs so that part is 16 feet wide. It has two small windows and a door with glass panes, so there’s not much of that, and it is treated with absorbers and diffusers. I have the speakers along the long wall, about 30” out, in a roughly equilateral triangle listening arrangement. In a much larger plush room I might need the boost.