I have owned U1s for 33 years and this is how I do it first I established my seat position then I take a small flashlight and put it between my eyes then aim it directly at the center cell until it reflects back to my eyes on the left and right center cell of both speakers. My speakers have a solid center image using this method. I also have an equilateral triangle between the speakers and me. When I listen to my system I make sure the off center distance from my head and the panels are under 1/4 of an inch when setting in my listening chair this helps with signals coming from both speakers getting to both ears at the same time, this seems unnecessary to some but believe me it does make a difference.