Isolation feet/cones for PS Audio NuWave DSD DAC

The reason both the metal balls and the curved based should be as hard as possible is because friction should be reduced to as close to zero as possible. This is why you see tungsten and cryo'd steel used for the balls and cups. I suspect NASA grade ceramics would work well, too. Remember, isolation can be defined as the ability to move freely in the direction of choice. In the case of roller bearings that means freedom of motion in the horizontal plane and twist (rotational) direction and to the event the ball can travel up long the curved surface of the cup in the other two rotational directions. The roller bearings don’t provide much of anything for the vertical direction, hence their use with springs. But five directions out of six is not chopped liver.

Ah. Thanks Mr. Kait. Okay. No doubt those plastic floor guards won’t be as smooth as the Ingress Audio pieces bdp pointed out. For the price though, worth a try. Certainly at least on par with Diament’s wooden egg cup suggestion; maybe better with the application of a little silicone to the surface. That should help get things rolling.

Apologies to the OP for contributing to the detour the discussion has taken.  Hopefully some of this extraneous discussion will be of interest.  

@itsikhefex

The DH cones do seem like a good buy at current pricing.  I don't know for sure but the Taranis amp I'm running seems to have them for footers (as supplied/stock) OR at least something that looks a LOT like them.  I have a mishmash of inexpensive isolation treatments throughout my system.  After I satisfy my curiosity about this roller bearing thing, I might well get a set of cones to try.  Big bucks for me!  ;-)  but not in audiophile terms.  Hope they work out for you.

Just to note that’s it’s highly unlikely DH Cones would be found on any random component, stock or otherwise, unless they were glued there (unlikely), as there would be no way to drill a hole in the bottom of the DH Cone since, you know, it’s the next hardest material to diamond. DH Cones. Accept no substitutes.