Nikkoholic
Active Member
I've often wondered the same thing and don't have an answer. I don't see anything as part of the grill that would simulate what they are describing. Unless the frame of the grills accomplishes what the "quarter wave plate" would. I can not detect a sound difference with or without the grills. I leave mine off since the "micro ball and catchs" have long ago failed. I've tried small velcro pads glued over them but they can't hold the weight of the grills over time and days later they end up on the floor. I've surrendered to no grills.