Hi Captain. I am not sure you have described your problem well enough for us to know what you are trying to solve.
Part of what you are saying seemst to be that there is not enough bass on some recordings. You also mention boominess. That is usually one frequency being overemphasized either by the sub or the room.
The first cannot be solved as that is what is in the recording. If you want more bass than the engineers put in the recording, the only way to do that is to adjust your sub/bass.
A boomy sub can be upgraded to one that produces sound more accurately. A boomy room needs to be treated.
