Townshend Springs under Speakers

OK… What is ASR?
Do you recommend it?

Audio Science Review. A forum where only measurements are considered and subjective opinion is pretty much ridiculed and shouted down.
Personally I think it is useful for the measurements - some of which I've found to corroborate my subjective opinion of components I've owned and got rid of (years before), but subjective assessment doesn't count on that forum. 

So what makes his speakers less responsive to springs?

Don't know. Given the wide range of speakers that have had positive endorsements, if it doesn't work with Vandersteen speakers they would seem to be an outlier. 
The other question is whether Richard tried the Podiums on a range of his speakers or just one of his top models which had been highly optimised for another approach?

I am not a total naysayer, I just want to know how they work… and whether they would work with my speakers. (Before I spend the money.)

That's wise. I've experimented with other (cheaper) isolation options and found them more effective than spiking for my equipment/room. That, along with people using the Podiums with same brand/type of speaker to excellent effect, gave me sufficient confidence to bite the bullet.
I'd advise to read/research as much as you can and attend a demo if possible (wasn't for me).

@audiopoint, Yes, we are now in the Nashville area and loving it.  Also, The Audiophile’s Wife is seriously considering writing again.  If fact, we are contemplating a shared site where we sell audio cables and she hosts her blog as well as other fun antics. 
I did have some Apprentice platrforms in my rig here for a season.  The speakers I used them under were the Acoustic Zen  Crescendo and my current Dali speakers which I have had for some 4-5 years now.  
Always liked the sound of your products and that Energy Room you built for Andrew is a listening experience I will never forget. Never! Just a sensory delight. Even the sound of my own voice was startling in that room. 

I do know that using springs on suspended wood floor construction works and I did the experiments.  My thought is that the floor was picking up the vibrations from the speakers and transferring the vibrations throughout the structure.  This caused bloated bass and smearing of the music. 

Those that have concrete floors would need to weigh in on their experience before and after springs. 

Just to throw my two cents in...

In addition to altering the number of springs and the position you put them in your Nobsound units, another thing you can try is getting 5/8 heat shrink tubing (non glue inside type) and cut it at the length of the spring then heat. Just enough spring will be exposed at the ends once shrunk to put them in the bases. This will dampen the springs action. Try doing some or all of them.

For those skeptical about the effects of spring footers (and it's good to be skeptical), we had a discussion over on ASR on the subject.
First I'd note that when I mentioned the sonic change from putting spring footers between my speakers and wood floor, a member there whose specialty was literally noise vibration (also did work for some turntable companies) replied:
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No surprise at all.

Spikes couple the speaker to the floor so, depending on the floor type, spiking the speakers to it is just like adding a huge area cabinet vibration to the sound.
Using polymer type footers only absorbs vibration at relatively high frequencies so couples the cabinet vibration to the floor at low frequencies as well.
Springs of the correct stiffness will decouple the speaker from the floor giving a similar increase in quality to a well engineered cabinet over a crappy one but probably bigger (coupled floor area being bigger than cabinet area).
It is basic noise and vibration stuff I used to do research in 45 years ago.
As a rule of thumb for the isolation to be effective over the whole frequency range the isolating springs will deflect around 1" due to the weight of the mass being decoupled. The smaller the deflection the higher the frequency above which isolation will be taking place."
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https://www.audiosciencereview.com/forum/index.php?threads/springs-under-my-speakers-whats-happening...



Another member posted measurements showing coupling vs decoupling:


https://www.audiosciencereview.com/forum/index.php?threads/speaker-de-coupling.13655/post-896618


Finally, this is very interesting.  It's a video from the Swiss speaker manufacturer Credo, explaining the effects of isolation vs a speaker sitting on a floor or spiked, demonstrated with measurements.


It includes measurements of a Townshend isolation platform along with their own platform measurements. They also measure the effects of such isolation in terms of the speaker sound in an actual room. It seems to map quite well to the effects I heard in my room:


https://www.youtube.com/watch?v=5ihzvD3urc4&t