lac,
Have you performed what is called the "subwoofer crawl"?
i.e. Position the sub in the listening position, put on a source that has good bass on it (Menu from the movie "Lost In Space", etc) preferably repeating, and then get on your hands and knees and literally crawl around the perimeter of the room listening to the bass. The location you hear the most bass is the best location for your subwoofer...
Now this position is not always the most ideal, so listen for the second best, etc...Put the sub in one of these locations, re-calibrate and you should be able to attain more of what you are looking for.
Ideally, like JohnK said...in a corner behind one of your mains is usually the best location but the above procedure will help derive that location.
It really DOES work.
Hope this helps.
Good Luck,
WhatFurrer
