SVS Subwoofer Isolation feet. Will I lose bass?


Most of what I see about subwoofer isolation has to do with minimizing rattles or bothering the neighbors.  But what about a sealed subwoofer on a concrete slab?  Would these dampeners not "dampen" the bass as well?

My setup...  Dual SVS SB16s on a concrete slab.  I don't have a rattle problem and the room is 20ft tall so I can't afford to "lose" bass because of my shakey rubbery feet.  

I've read and seen many great things about these but I have a hunch it would hurt a sealed sub on a slab more than help.

dtximages
my experience soft vs rigid is similar to the video.  the best sound achieved on my carpet over concrete floor is when the spikes pierce the carpet and make contact with the solid floor, speakers and subwoofer.  
I already explained why carpets are bad Gnus. 🐃 🐃 Besides, this discussion is really about isolation vs spiked or soft, not spiked vs soft. If the SVD isolation feet are some kind of rubber they aren’t providing real isolation, anyway. A lot of companys call their feet isolation feet but they are really dampers of some sort. What I call real isolation is mass on spring devices, you know, air springs, air bladders, even squash balls, inner tubes, but especially steel springs. So, in that light I’m not surprised by the YouTube test. I would not say SVS are comparable to real isolation devices. Get real.
I think some people are too smart for their own good and too dumb to know it.  

1. The SVS Isolation feet are basically the same as squash balls or any other type of rubber device that limits the transmission of energy into the floor.  

2. This conversation is NOT about spikes, it's about isolation feet in a sealed sub on a slab floor and its effect... Detrimental to output?  If so, do the positives outweigh the negative of less output?.. No theoretical bs about layers of quartz rocks.

3. Can you block someone from posting on a thread?  

4. If I told geoffkait he's the smartest person in the room and gave him a cookie would he go away?  
"No theoretical bs about layers of quartz rocks."
I believe that already morphed from theory to practice.

"...and gave him a cookie..."

🍪

https://www.today.com/food/girl-scouts-left-thousands-unsold-cookie-boxes-due-coronavirus-t179265
@dtximages I have an older pair of the SVS SB12-NSD subwoofers. My subs came with smallish rubber feet (I assume rubber) that keep them off the wood flooring. I would think yours did also. Are you just wanting larger ones?

As I mentioned mine work fine on wood flooring but would likely not on carpet.