"For years cone makers have claimed that cones are "mechanical diodes" passing vibrations only in one direction. This is baloney, and here is how you know. Vibrations are three-dimensional things. A table or rack shelf vibrates in three directions: up and down, left and right, and front and back. Hold a board in your hands, a board large enough to support an audio component. Put an audio component on the board on some cones. Now move the board up and down slowly. Do the cones and component move up and down too? Yes? OK, then the cone isn’t isolating vertical motion. Move the board slowly left and right. If I’m not mistaken, the cones and component also move sideways at the same time. So cones provide no left/right isolation either. Now move the board slowly front to back. The cones and component also move front to back too, right? Of course they do. This is because the cone is not an isolation device of any kind, and it is not a mechanical diode. Cones are simply a kind of foot that couples something, an audio component for example, to something else, usually a rack shelf. Moving the shelf slowly is no trick. Higher-frequency vibrations will behave exactly the same way the board and cones and component behave when the resonances are slower."
http://www.soundstage.com/maxdb/maxdb071999.htm
Jag är mycket skeptisk ... 😑