Hi everyone, I've been constantly trying to tweak my sub ever since I've had it. My room is small and is only measured at 12 x 15 x 8 feet and I have the PB2+ located in the front left-hand corner of the room - which is the only real place it can reside due to the my limited room space. After spending literally hours of moving the sub around within the small space that I have to work with, I have concluded that if the sub is right against the corner wall (with a West/East configuration and the ports facing East), then it sounds quite boommy and undefined but you will gain around 1-2dB extra. Moving the PB2+ away by about a foot from the corner-wall seems to yield the tightest bass I can get from that corner placement. I have the PB2+ tuned to default with 3 ports open and have it calibrated to 85dB with the cross-over set to 80hz (speakers set to small). With movies such as Titan AE DTS, Minority Report DTS, U-571 DTS, LOTR: FOTR/TTT (2-disc edition), Fight Club, Toy Story II, Finding Nemo, Monsters Inc, Blade II DTS, The Haunting DTS, Jurrasic Park III, and many other reference dvd's the PB2+ performs superbly, offering extremely tight clean bass which is not boomy at all. But then I recently put on Underworld (after hearing how much clear, low LFE the soundtrack had) and was really really disapointed by the bass I was hearing from the sub. First off, it sounded very boomy and undefined and overblown that I thought that there was something wrong with my PB2+ But I quickly took Underworld out of my dvd-player and put in U-571 to double check that there wasn't anything wrong and gone was the boomy, undefined and overblown bass. I know that the the boomy, undefined and overblown bass I'm hearing from Underworld is not down to my sub's performance and the problem is probably not down to the dvd's soundtrack either going by the very possitive reviews on the net regarding the soundtracks LFE. So why am I getting boomy, undefined and overblown bass with Underworld ?