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Old 22nd January 2008
Lives for gear
nosebleedaudio's Avatar

I used 3/4" plywood and 3/4" MDF on top of that with nothing in between.
Bat insulation would work but may not be required.
I had the 2 layers glued with wood glue, very solid feeling and no noise.
In the main studio I built the finished layer was a tongue and groove solid wood.
I would not use sand for several reasons, your choice..