Footfalls are almost always a problem with LP12’s, even on concrete slab, unless you put it on a wall shelf, which would be my suggestion. The Audiotech shelf worked well. I’ve had an LP12 setup in at least a dozen apartments/condos/houses on all kinds of flooring, and on several Linn-approved shelving, and always had footfall issues. The Sound Organization table was the worst. For the doubting thomas’s, I had the LP12 for 22 years, always setup by LP12 guru’s.