Great find. I've tried Vibrapods, but they made speaker wobbly and they also collapsed over time. Now I live in one story house on the slab + ceramic tiles - vibrations are gone - bass is fast and even, while music has more clarity.
SOLVED: Room boom
I have raised wood floors and VSA Ultra 55's (active edition) with Critical Mass footers. Tracks like Boz Scaggs' Thanks To You would cause the floors to physically vibrate so much I could feel it through the frame of my listening chair even with the VSA bass gain to lowest setting.
TL;DR I added these these $30 vibration pads under the CM footers and they totally cleared the vibrations: https://a.co/d/fvC3av5. I'm also getting better general depth & clarity.