Hi, I've had my CHT-15 for over 3 months now and it is no doubt a superb subwoofer. After hours of experimenting I have placed my sub between the TV and the right speaker and I feel this is the optimal possition given my room size (12 x 15 feet). I have noticed boomy bass with a few dvd movies and I want to know whether that is down to a) my subs performance, b) room accoustics, or c) the dvd sountrack it self and I'm hoping it the last two. I have all my speakers and sub configured to 85dB using avia BTW. Below are a list of films which feature boomy bass that is very noticable: The Ring R1. When the women goes to the cabin to play the video tape for the first time, during the video, you can hear a low rumble in the background which is not defined but boomy. Mission Impossible 2 R1. The first half of the film has good tight bass, but towards the end of the film as Cruise escapes the enemy base it gets a bit boomy. I watched the whole movie at no louder than -05dB. Akira R1 THX certified. In general, this film exibits a fare share of boomy bass. Has anyone noticed boomy bass on these films?