DJ, I had a similar problem sans the 16' ceilings. A 10'x13' area rug over the listening area of a large stone tile room took care of the direct reflections from my CLS's. Canvas works on the back walls. Others tell me that plants, with lots of leaves (i.e. the dreaded ficus tree) do a good job at difusing sound.
High ceilings and hardwood floors
Moved into a new house. Man my system sounds so bad I never want to listen anymore! My old room was carpeted and had 8 foot cielings. New room has 16 foot cieling. Sounds like I'm in a cave. System has no weight or focus. Very thin. I'm sure wood floors don't help. Room is about 16 x 28. Anyone have any thoughts/help for me?
Dave
Dave