Is there such a thread on GS? My Google finds too many Clarity VX.
Not a "clarity" specific thread. I just picked those three measurements out of maybe 30 or so different in-room measurements gathered from gearspace members.
My subs w\o xo measured in LP (somewhere about 4 meters from speakers) in 2019:
Pretty good considering the distance... my
single sealed sub's front baffle distance to the couch's center MLP is about 3.6 m -- it ought to be really closer approaching 4 m when one is seated at the corner-end seating positions of the couch.
There's also a visible drop in the displayed clarity values at 50 Hz (and likely below); although, not nearly as much as yours due to the room acoustics itself.