Rick, what a great solution! Love it. I wish I had a cabinet big enuf to try that. :-)
Riley804, FWIW, I'm not convinced that you have really isolated floor borne vibrations, or air born vibrations for that matter, by using metals and woods in any configuration which IMHO probably do not damp the vibrations you are trying to to prevent from reaching your TT.
Personally, in your situation, I would have kept it simple by placing some sorbothane type of rubbery product on the cabinet shelf and a piece of a soft wood on them to make a platform for your TT. To minimize the cabinets interior reflecting surfaces I would get some moderately dense but thin foam and line all of the surfaces about and above the TT.
FWIW.
Riley804, FWIW, I'm not convinced that you have really isolated floor borne vibrations, or air born vibrations for that matter, by using metals and woods in any configuration which IMHO probably do not damp the vibrations you are trying to to prevent from reaching your TT.
Personally, in your situation, I would have kept it simple by placing some sorbothane type of rubbery product on the cabinet shelf and a piece of a soft wood on them to make a platform for your TT. To minimize the cabinets interior reflecting surfaces I would get some moderately dense but thin foam and line all of the surfaces about and above the TT.
FWIW.