Some testing: The new Atlas makes it clearer that the subsonic effects (and possibly, the subsonic woofer pumping once per revolution) is part of the intended sound, e g in the introduction to Pink Floyd: Echoes. It resides in the recording (or my pressing) and is not in a fault in the system, even if the resonance frequency of my arm and cart is a bit low / challenging, so everything happening down at the end of the frequency scale is picked up.
I don’t hear much rumble or other unwanted effects, just a marvellous big soundscape.
On Rickie Lee Jones The evening, I no longer see any clear subsonic woofer pumping, just a lot of energy, in the woofers, coherent with what I hear.
So it seems, especially with the new Atlas - just look away from eventual woofer pumping (as long as the woofers don’t complain), give it a go, and enjoy the superior sound.
Pink Floyd’s Echoes is known to include "subsonic" effects. Maybe once per revolution - like they later experimented with heartbeats, on Dark side...or maybe on Echoes this is a not intended side effect, who knows. I have an early second pressing of the Meddle UK original, matrix side 2 (with Echoes): "SHVL 795 B-6" "11"? "1" and handwritten "HTM". HTM means Harry T Moss cutter extraordinaire at EMI UK. I have read that subsonic effects may happen due to record warp, but I cannot find any signs of this, with my copy.
Does it sound good? You bet!