generally a wall mounted TT shelf is prone to wall-induced vibrations because the entire wall acts as a sounding board & flexes right along with the music. This can become a serious enough degradation so as to even cause a vibrato / speed pulsation intermodulation effect. Wall mount TT shelves do work better on (brick) solid walls (exterior) etc.
I'm unsure if any kind of shelf would provide the relief required. Perhaps Symposium roller balls or some other type of bearing footer (Aurios MIB) might help to some degree. Maybe a flexing floating platform shelf such as Arcici? Or a magnetic floating or spring mount shelf, although that is all contrary to conventional mounting recommendations of rigid high mass platform & solid coupling to the floor on a rigid stand. For best results, check into an alternative TT support system (spiked floor mounted rack) if possible.
I'm unsure if any kind of shelf would provide the relief required. Perhaps Symposium roller balls or some other type of bearing footer (Aurios MIB) might help to some degree. Maybe a flexing floating platform shelf such as Arcici? Or a magnetic floating or spring mount shelf, although that is all contrary to conventional mounting recommendations of rigid high mass platform & solid coupling to the floor on a rigid stand. For best results, check into an alternative TT support system (spiked floor mounted rack) if possible.