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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
jetter
3,124 posts
 
@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.
dtximages OP
368 posts
 
@jetter yes mine came with the normal small hard rubber feet to keep the sub off the floor about 1/2 inch.

99% of the things I've read/seen/heard about the SVS isolation feet has been positive. Tighter more accurate bass, sometimes deeper bass, etc etc..

But, the last YT video i watched mentioned that on sealed woofers, there's a significant db drop.  

So, to get this tighter/cleaner bass, am I sacrificing output? According to his measurements, it's significant.

That's the question.
dtximages OP
368 posts
 
To expound on the YT vid I mentioned, his measurements, if I remember correctly, showed almost no impact on a PORTED sub.  There certainly is a difference in the way cabinets react to a moving woofer in a sealed cabinet with no air escape, so this seems to make sense.

If these feet are detrimental to a sealed sub, I wonder why i have not heard anyone mention it.  

Could it be because we're all sheep and agree with our favorite poster or reviewer?

I know that MANY people have sealed subs and have sought after isolation.


jetter
3,124 posts
 
@dtximages  I was actually considered getting these for my subwoofers, not realizing that there were already feet on them..  I was just checking out the SVS website and if I understand their pricing correctly it looks like it only cost $49+shipping for a set of four.  And there is a 45 day return period if not happy.  Seems reasonable enough, especially compared to some other audio items.
bdp24's avatar
bdp24
10,297 posts
 
Yep @mahgister, the video you provided a link to (I really gotta learn how to do that ;-) is the one to which I was above referring.
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