Turntable and Rack vibration control

Actually granite won’t resonate or ring if it’s thick enough under normal conditions unless struck with a hammer or wrench. So my advice is don’t strike it with a hammer or wrench while music is playing and you’ll be alright. And if the granite slab is up on springs so much the better since the granite will then be isolated 99.99% from anything from the floor that could possibly make it ring. Besides the resistance to bending forces outweigh any risk of ringing. That's why the big boys like Newport and TMC use granite slabs on their uber expensive isolation platforms. 

I also disagree about the EAR stuff. Very "weird" sounding. It looks like such good material, too. Oh, well, at least I tried. C’est la vie.

I think Minus K isolation would help tremendously, not cheat but very effective 
and no compressor needed.

I may be wrong, but @pani is trying to walk a fine line here- too much cushion and he loses the immediacy that these tables are known for (and the reason he presumably switched from the Platine Verdier, which is highly regarded table). I can’t really extrapolate my experience because I use a very high mass turntable, but I was bedeviled by a springy wooden floor when I lived in New York and wound up with another historic house in Austin (which actually has nice sound for reasons that go beyond this thread). Initially, I had a Finite Elemente stand for the table, but it didn’t do a very good job at isolating footfalls (I’m not sure it was intended to); I eventually had an HRS platform made for the table, and that still needed more help to fully isolate the table- using these big chunks of sorbothane under the legs of heavy mahogany antique prayer table/HRS platform/turntable.
When I moved, I didn’t have the luxury of such space (that prayer table was easily 10 feet long and heavier than XXXX).
I kept the HRS and did buy the big Minus K. It certainly solves any footfall problems. I know that @pani said he doesn’t want to get that spendy. For what it is worth, I reinforced the floor in the area when the front end gear is located- using double sheets of marine plywood, mass loaded vinyl sandwiched in between and topped with a piece of barn stall mat- the stuff you see in gym weight rooms. It isn’t springy, but it will take some punishment.
The table is on a steel welded frame supplied by Minus K- that frame was actually pretty cheap- under a grand, with a nice phenolic table top, that can be bought separately.
I think part of the trick with these things is to load them near their maximum, and perhaps that’s how @pani can straddle the line between too soft and no effective isolation. The Newport products look fairly cost effective.
I have no doubt that these lab style isolation devices change the sound of the table. But, in my case, it was a choice between that or not using this table (too heavy to wall mount effectively-- I even had a structural engineer here at one point for other work and he wished me luck).
Hope you get it sorted. If Ralph’s high mass solution works on an old wooden floor, perhaps you don’t have to go to these lengths. But, without the Minus K, it was still a lot of work to immunize my table from footfalls without such a device when I had it set up in back in NY.

Thanks guys,
I need to clarify few things. My floor is concrete but with wooden parqueting on top, so there are no foot fall problems.

I am just looking for a good vibration control for quieter playback. One of the achilles heel of using turntables like Garrard is one is on his own to handle isolation of the TT. The plinth is mostly any of the small DIY outfit and there is no scientific method being used to create a plinth or platform for the Garrard to be hooked on. It is quite unlike a TT like Technics SP10 or say a VPI where all these things are done up for you at the factory so it can be played back right out of the box. 

Till now I have tried to keep things simple with my garrard by using a good multi-layer birch ply plinth and using some cones to rest it on the rack. But it is now getting painfully clear that this is not a very well-sorted system. The noise floor is high, the images are grainy, the air and tranquility is missing. When I tried some softer footers, it did wonders to the sound by bringing back the air and lowering the noise floor, just that it was again not a full proof solution.

I wonder if I should get something like an HRS platform which is scientifically designed and as is a complete solution of sorts. Suggestions ?