Any tweaks recommded for under cd player?

I use the BDR cones on a shelf directly below my CDP 7TL MkIII. I have the cones screwed directly into the threaded holes in the gold feet where Lector's own small cones can be threaded. No vibration issues whatsoever. Other things that may affect/improve the high frequencies include changing tubes, changing IC's, and CD treatments and mats.

Can't remember for sure and would have to take them off. They are screwed into the mfg feet in the bottom. Lector wisely uses only three feet so the player sits without rocking. The cones are supported directly on a BD Shelf which is supported on an air platform then a very well reinforced oak rack. I am sure others have different ideas about support and isolation, but this combination works for me. I view the support as letting the player do what it does with out disruption, whereas I think tubes and cables can be used to more actively achieve a certain "sound" whatever that sound is to you.