Townshend Springs under Speakers

benzman, will be interested to hear your thoughts on adding the pods to your other equipment. 
I'm continuing to enjoy what the podiums have brought to my setup - the layering and greater depth perspective along with the greater image palpability and uncovering of more recorded inner detail. 
I'm noticing that differences in recordings/tracks are more stark - i.e. the differences between recording techniques and indeed the quality of the production is more obvious. 
The upshot is that it makes listening to music more compelling - hearing further into recordings and getting closer to the artist.
IME these types of changes always seem to follow genuine improvements.

mitch2

I am saying: It’s an idea, opposed to rigid, worth trying:

but let’s stop and think: it ain’t exact (weight range 36-228 lbs) even if you buy very expensive products ($1,200.). I would want to prove the concept first, then refine if I feel a need to.

And, in my case, toe-in gets actively changed, so a slip surface could be glued to the bottom.

here’s 4 x 4 isolation pads from Cambridge, 8 for $26.00

https://www.amazon.com/Cambridge-Vibration-Rubber-Dampens-Vibrations/dp/B08NXZFGWT/ref=sr_1_73?dchil...

like cork? 8 for $25.

https://www.amazon.com/Pack-Anti-Vibration-Rubber-isolation/dp/B01IU6WT5O/ref=pd_bxgy_img_1/130-8897...

I use 2x2 pads similar to the Cambridge under my TT’s feet, just enough isolation to lessen footsteps from my springy wood floor while walking away, It was hit or miss which material/thickness would work, I just got lucky first try. Meanwhile the heavy plinth above them provides stability.
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Thanks for the suggestion, however the owens corning fiberglass boards (considered rigid as it doesn’t roll up), is soft, they are made for sound absorption, not vibration attenuation. No way could that fiber support over 100lbs. I designed corporate office space for 46 years, worked with acoustic consultants, specified special absorption and transmission materials for walls, ceilings, isolation for fitness center’s raised floors, (jumping up and down on heavy equipment, dropping barbells in offices with other tenant’s space directly below is a challenge).

OC703 is acoustic panel. Great for DIY acoustic panel. But for under turntables, other components, and speakers? Nope. Nobsound are a far better choice. 

My suggestion was based on my suspicion that the AV RoomService Ltd. EVPs are constructed from Owens Coring 703, 704, and 705 Rigid Fiberglass Board that is finished with stainless steel plate and then either felt or rubber mat on either end (side?). The paint used on the fiberglass is said to be flexible.

AV RoomService Ltd. believes in decoupling speakers and gear for best sound and they indicate their EVP product uses a glass spring (e.g., fiberglass) to transform the vibrations into heat (see quote below from  AV RoomService Ltd.).  I was very close to making some EVP clones to try under my subs and main speakers but ended up with springs and didn't see a reason to try something else.  IMO, the most difficult processes would be cutting the board and the steel plate materials cleanly and dimensionally accurate without access to industrial cutting equipment.  

Assuming the fiber board is doing all the work, I wondered how much of the benefit could be derived from a simple DIY project by putting the appropriate amount of board under the speakers resulting in compression in the range of about 10-30%.  However a plate may be needed on at least one side to evenly distribute load if the speakers sit on carpet.

From the AV RoomService Ltd. website:

EVPs de-couple vibration transmission (>90% from 5 Hz. on up). They do so by transforming the mechanical energy into thermal energy. EVPs keep the signal integrity intact by keeping vibrations at bay.

Okay I get it now. EVP is confused and has conflated damping with isolation.