SVS Subwoofer Isolation feet. Will I lose bass?

@shiner01  Thanks for posting.. Great information.

But Geoff....If a second "Spring System", applied to the vertical plane isn't identical to the first. And in fact is designed to augment the first in a resistive fashion. (By design, tuned for a different cyclic wave range, with also a transduction medium utilized between layers, "Each a discrete (compartment), in a multi-layered architecture". So that instead of the way that a spring usually and inherently utilizes as it's means of kinetic dispersion, it cannot interfere with the other system involved). Would that not be beneficial? It would only be detrimental if the range of each spring "System", indeed "Crossed" by a fair amount. (>.007%). Which could also cause odd harmonic resonance. This will also increase the efficiency of the spring in the 8.32Hz-50KHz range. "Funny how it seems to begin at the "Schumann", resonance"!
 This is only, "Of course" in a multi-layered, Constrained layer system.
And um...Using a certain alloy of brass which has been in fact, (Cast) in the springs construction seems to help "ALLOT". I also still have a few of the, "links" to a few of the studies done on the specifics of this. In case anyone would like to peruse them.
 Hee hee, But I'll warn you now, they are quite the exhaustive read!

One more thing I have noticed in experiments with "Constrained layer damping" systems.
And this is a bit weird! But interesting all the same.
 Everyone knows that three points make a perfect plane. And you must have at least three to make any "plane".
 Also that anytime more than three are used? You may ONLY make an "Imperfect Plane". And of course we all know that, No- "Perfect Plane", can exist even in theory, with more than three points.
 Basic physics, and at it's most easily defined, understood and excepted level right?
Where this got interesting was in my plotting though "Cymatic" figures for vibration analysis. While, "Transitioning known quantities of specific vibration through differing transduction devices/systems/materials as accurately as possible was the goal". This for a "Baseline".
{{Why? Because,
 If I do not make it? I will never be able to have the fun of figuring out how to break it.}} Also It should improve the sound of any system tuned for where applied.
 Anyway, The goal being- So that on each side of the equation?
 The, "Cymatic", physical representation plotted with the same equipment should at least, "Resemble" that of the other side. Just a difference in amplitude if done correctly. Fairly simple right?
But while using these springs. "Yeah, I am going to blame this all on Geoff! I wasn't much on springs until that kernel was placed there by Geoff. 
I had an idea coalesce from something I had recently read in another's notes. "He has long since passed and I do not think would mind".

"As we look at the six original Solfeggio frequencies, using the Pythagorean method, we find the base or root vibrational numbers are 3, 6, & 9. (AND)-. Nikola Tesla tells us, and I quote: "If you only knew the magnificence of the 3, 6 and 9, then you would have a key to the universe."

And so, simply because I could. I figured "WTH", and why not.
 Using only sets of three, for each plane.  As the only points on each level of three layers.  And this in a symmetrically balanced, vertical structure, that of a three layer system?
 After all of that? 
It just wouldn't work!
Well, not until I applied a voltage..... Then it became a "Polarized system".

My Nirvana Platform is a dual layer heavy masses on springs system that employs a second mass-on-spring system on top of the first mass-on-spring system. But the two systems would interfere unless their individual resonant frequencies Fr can be separated by X number of Hz. It would be like driving down the road with a double identical springs in series for each wheel. It would be a very rough and chaotic ride. For heavy masses I use 2” thick bluestone slabs that are around 25 lbs each and my cryo’d springs. If you do it right you can get down below 1 Hz with ease. This one of the isolation concepts employed by LIGO project to detect gravity waves.

OP, just to mention again, I believe the SVS feet are only $49 for a set of 4 (verify with them), with 45 day return period.  Shoot, for that little I would pull the trigger to see if it suits my fancy before investing in the high priced spread.

Though 3 points do indeed define a plane, springs don’t care about that. They are more concerned with mass stabilization. I have found 4 springs to in general be much more stable than 3.