Just reading a little about the Cabasse M2 8" subwoofer:
The membrane of the loudspeaker is thus held with an iron hand. Good point: the vent of the bass-reflex load is laminar type, to avoid airflow noise at high level of listening.
They could probably get greater SPL if they didn't have an iron hand holding it.
FWIW, It is a vented speaker.
The very successful aesthetics of this box favors its installation in a room of life.
Well... it is your bedroom, but I think the salient question is whether you have procreated in there! Otherwise it might not fit in too well.
It does not mention having the "bug shape" like Canton Ventos have. That is somewhat disappointing!