A slab of 1/2" acrylic suspended by four double runs of 10 lb. test fishing line attached to a 3/4" slab of plywood over the rafters in the attic. Until I mounted it this way, I could never get my Oracle Delphi Mk.2 to bounce straight up and down perfectly. Now it does and the platform goes with it, but at about half the amplitude of the subchassis. The sound improvement over sitting on a pressboard cabinet was huge. It was the best tweak I ever did. After I drilled the holes in the ceiling, I plastered right up to the fishing line so it appears that the line is glued to the ceiling.
What's under YOUR turntable?
You're very welcome to be as informative as you wish.
(My apologies for borrowing on a similarly* titled thread in the Digital Forum.)
(My apologies for borrowing on a similarly* titled thread in the Digital Forum.)