All great thoughts on this universal challenge we often have in our listening rooms. I am on wood floors and conventional foundations so when my 20lb dog would walk through the house I could feel each step in my listening position.....crazy! I moved to a wall shelf but now have the same issue polkalover mentions. When I lower the arm, sometimes I get an immediate bass tone from the speakers. I didn't think of applying downward pressure, but instead applied slight upward pressure like I was going to pick up my turntable but didn't actually lift off the shelf. It immediately stops the rumble/tone. There hasn't been much comment here on the Delos or any of their Orea feet. These are somewhat reasonable in price. I am looking at either 3 of the Bronze feet or the Delos 1.75in thick platform. This is $150 vs $400. I will call tomorrow and see how these feet of the platform compare to the Orea. This isn't explained in the technical details, but I would imagine it is the same design. I may order both and simply keep my preference. The farther I go with improving my system the more weaknesses are revealed. It is so much fun and challenging....god I love this hobby!!!