It’s the fact that you have these bass drivers in open baffles. That turns their radiation pattern into dipole (radiating to the front and back more or less equally), and that tends to rob the bass of impact unless compensated for in various ways.
I remember reading reviews of Legacy Audio’s then TOTL speakers which were open baffles with 2 x 12" drivers at the bottom of each speaker. The bass was typically described as nuanced and delicate, but not up to dance party standards. A case where the speakers looked like they would shake the foundation but could not, because of the open baffle & dipole radiation pattern...