Originally Posted by ncpl
How effective to you find those corner treatments to be ? Are they free-standing or fixed to the wall?

cheers
They're free standing and find them very effective on the cheap, I also have side treatments that my wife she won't let me put them up. The book cases are another cheap form of room treatment as well. With the corner tubes the bass from the 8k sounds very solid and quick and without them you hear more bass closer to the speakers instead of your sweetspot.