How did you determine that the bass is a little weak? Is it the balance of the mids to highs too much relative to the bass? Are there four walls or is one end of the long room open to another room? You may need to describe the room in more detail and where the speakers are in the room, as well as where you sit to listen.
Let us know what you've already tried to determine your bass lack, and anything you think of trying to correct the situation.
Let us know what you've already tried to determine your bass lack, and anything you think of trying to correct the situation.