Using Maple Butcher Block Under a Turntable

@tooblue, thanks for the information. I happen to have a 1 1/2 " thick slab of maple from my sisters kitchen remodel; countertop. Should fit the bill for an experiment. Not sure if I'll hear a huge change as my TT is a 1985 AR with a SME III tonearm. Not quite the instrument you have in your setup but I dearly love it. I'm thinking the AR suspension may cause it to be less sensitive to a number of environmental factors.
But, one can never be sure until one actually experiments. So I will give it a go.

@tuzarupa, small world, the table I had in play when I purchased my Lead Ballon was an AR EB101 and it seemed to work well for that set up, but what did I know. I just pulled my Arcci LB out of the attic a few years ago when I bought my Prime to replace a Scoutmaster that was inside my Salamander cabinet and the Prime would not fit, I sandblasted it, powder coated, added a middle support for a shelf at dead center and installed  2" maple shelves to support my tube mono amps to let them breath also adding mass to the structure by their shear weight also replaced the Iso Physics tone cones on the bottom with Herbies Giant Threaded Stud Gliders finally loading the legs of the stand with a mix of sand and Lead shot. Although I was just looking for a temporary set up to get me by the results have been stunning allowing me to move on to other things.

My TT is a Technics SL1210M5G. I use a combination of Vibrapod Cones and Vibrapod Isolators under the turntable itself, and placed on top of a Michigan Maple butcher block cutting board. It's pretty massive at 20"w x 15"d x 3.5"h (I think it weighs as much as the turntable). I felt I needed something to isolate room vibrations from traveling up into the turntable. On the advice of a disco DJ (who used a similar turntable) I bought a pair of Fellowes silicone gel wrist pads made for computer keyboards. The DJ said they'd do a great job of keeping bassy feedback out of the signal chain.
He was right. I've had my turntable/butcher block stack resting on top of those wrist rests for around 8 years now with no desire to change anything.

I don’t think there’s a simple answer to this question. It depends on the floor, the rack, and the turntable. I’d try different things. I have 2 turntables. My equipment rack has 3" wood maple shelves that sit on small sorbothane bumpers and it sits on a concrete floor. The TT is more than 8’ away from the speakers (as noted, the further away the better).

My old HW-19 VPI TT (unsuspended) sounds best with an older variant of Herbies sorbothane pucks underneath it. I didn’t like the sound of them under my TW Acustic TT (122 lbs!). However, with the TW, I still hear some noise from the speakers if I rap hard enough on the wood maple shelf it sits on, so it’s not yet fully optimized.

I’d buy several cheap isolators people suggested or make your own (skip the Spam & DelMonte except for dinner?) and try them all out. Good luck experimenting!