Okay, I'll stick my head out and lay it on the block. My home theater has been in operation for about one month. New 950 & 7x M200. Speakers, cables, and DVD player have many hours on them. At first my system sounded thin and bright. I was disappointed. After one week, probably less than 10 hours, I played a CD that had been used several times during the previous week. To my ears, the system sounded much improved. No scientific study was performed.