Linkwitz is a thorough professional who has been behind some major audio developments. He argues strongly that room acoustics can be modified using ordinary furniture and an interplay of soft and hard surfaces -- making it possible to achieve satisfactory listening conditions without turning a room into an obstacle course.

Lots of other articles on hifi and audio at his site. Linkwitz is a great believer in dipole speaker design, but his findings on room acoustics are relevant for other kinds, as well. The Audio Critic a few years ago considered that the BeoLab 5 and Linkwitz Orion speaker designs were the most radical and relevant breakthroughs in audio in a long time.

http://www.linkwitzlab.com/rooms.htm