What are your room dimensions?
Where are the speakers located?
In what range does it sound boomy?
Plugging the ports will change the sound, but I am not sure it will necessarily be better.
George
Room dimensions are about 11ft wide by 22 feet long. Seven traps in the room, all Realtraps: 2 mondo (corners near speakers), 3 regular (2s at reflection, 1 on ceiling), 2 soffit (not made anymore, in corners away from speakers), 2 thin (put between speakers when playing). I also have two ASC traps under my two subs.
The speakers are about 5 feet from the front wall, about 3 feet from the side walls.
It's boomy only in the low frequencies, below midbass.