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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
geoffkait's avatar
geoffkait
23,365 posts
 
The primary reason to isolate the subwoofer is to eliminate mechanical feedback to the system via the floor. The secondary reason is to reduce subwoofer cabinet resonance. It’s two, two mints in one! 🤗
dtximages OP
368 posts
 
geoffkait, I understand that.  But if you have a sealed sub on a slab, wouldn't the "wobblyness" be counteractive to the woofer?  Lessening its effectiveness?  Lowering its output?

According that dudes youtube vid, that's exactly what happened I think!  But I have not heard others say this is an issue.  

I figured, surely, someone has first hand knowledge of the effectiveness of these feet, or Auralic Subdude on their sealed slab-sitting sub.
geoffkait's avatar
geoffkait
23,365 posts
 
No. The (appropriate) springs have very high lateral stability for subwoofers, as we say in the trade. Stiffness to any civilians out there. No wobbling.
millercarbon's avatar
millercarbon
12,531 posts
 
geoffkait, I understand that. But if you have a sealed sub on a slab, wouldn’t the "wobblyness" be counteractive to the woofer?

Yes. Exactly.

One thing you need to understand, you are taking advice from a self-proclaimed theoretical physicist, who designs interstellar rocket propulsion thrusters in his spare time and has a website devoted to flying saucers. His most impressive accomplishment is consistency: 21k posts, and not a one of them worth reading. Irrelevance on such a scale is remarkable even among audiophiles.

DYODD.
dtximages OP
368 posts
 
Ok the SVS  are not springs. They're little malleable pieces of rubber with zero engineering thought included.  There certainly is back and forth.

These are not isoacoustics feet. 
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