Springs under turntable

Mitch, if you hear a difference you are blessed. Set up your system any way you want. 

Millercarbon, I have done that experiment with a tube phono stage, an oscilloscope and a test record. There was no difference to either my ears or the oscilloscope trace at any frequency. As for my speakers? My subs weight 250 lb each and I have 4 of them. My speakers are 7"11" tall and my ceiling is 8" so putting anything under them is a non starter. The subs are so heavy and stiff that they do not vibrate. I have Vinyl and CD sets on display right on top of them.  Trying to isolate a subwoofer is beyond silliness. When bass is produced by a powerful system capable of going flat down to 18 Hz the entire house vibrates isolated or not. Put on a 30 Hz test tone and turn up the volume. If you have a decent system everything in the house will start buzzing. Any movement of the subwoofer itself creates distortion. Mine don't move because they are so heavy and they are spiked to the floor. The stuff on top of them doesn't even move including my Mo Fi Beatles set. But turn em up and the entire house buzzes. If you think you hear an improvement in your bass by putting your speakers on springs it is purely psychological or perhaps your speakers sound better just because they are up higher. So get yourself a nice looking set of speaker stands. But, subwoofers to perform their best need to be right on the floor up against a wall or in a corner. They gain up to 6 dB in efficiency this way and eliminate the first reflection entirely, improving bass throughout the room. 

Millercarbon, with all the neat improvements you have made you must have one heck of a system. 

indranil,
another way you could try is to get the number of springs you have (hoping four?) under a heavy shelf, larger than the base of the TT you are using. Get the shelf completely horizontal, buy starting from the furthest edges of the shelf that will accommodate the leveling, moving the springs to suit under the shelf, creating the broadest sprung base. Now find where the TT with a record in it will sit on your shelf where that position will make the entire shelf and TT horizontal. Hopefully the center of gravity off the TT will align with the centre of gravity of the shelf in a vertical alignment.

millercarbon - now you can see why Townshend calls it seismic isolation!
I am glad you were willing to try it, to discover it for yourself.

And the springs on your wooden floors might be about the same as suspending the cables, have you shored up, or propped up under your floor where the springs are yet? Because if you have not, I wager money on it, there's more in store for you yet.

...have you shored up, or propped up under your floor where the springs are yet?

A room on a suspended floor versus a concrete floor can only throw up so many issues around vibration and resonance, I can't imagine how I'd go about trying to fix all of them! Starting from a concrete room allows me get past all of that. Consequently, my system is very responsive to small changes and tweaks. 

@noromance- That is very true for a concrete floor...While it doesn't absorb all the seismic vibration issues but it allows these tools to work optimally relatively easily. You are one of the lucky folks to have the advantage of a concrete floor and can focus more on the music....
Thanks.