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Floor standing speaker isolation advice needed.

I have an older pair of KEF Reference Model Twos that currently sit on their brass(?) feet on the floor. The floor is tile but not solid cement underneath. I bought two .5" thick granite tiles for underneath the speakers and am wondering if I need to do anything else like put the spikes on the brass feet, add sorbothane under the granite tiles and/or under the brass feet or something else I should be considering? Things sound good on the top end but seem a bit subdued/muddy in the bass region. The KEFs are being driven by a Parasound Halo A23 and I’ve got a HSU VTF-3 MK 2 helping out the bass, mostly for movie duty.


Thanks for any advice.
asahitoro
kalali's avatar
kalali
1,977 posts
 

If you already have the spikes in place, you can consider using the Herbies with the brass fitting for the spike and the decoupler attached. I like the spring idea but finding ones with the right compliance to create a stable platform might be a little challenging.

ebm
9,311 posts
 
geoffkait  If you think its a joke i really don't care.What do you have under your speakers???
asahitoro OP
244 posts
 
I think he was kidding. :)
geoffkait's avatar
geoffkait
23,365 posts
 
ebm, I was joking with you. Ha Ha. Uh, especially in light of the fact you’ve promoted those stands over 1,000 times according to my trusty calculator. Actually that’s about all you post. What’s up with that? 🙄
cd318
2,636 posts
 
@kalali, yes finding springs with the optimum compliance can be a problem especially if large heavy drivers render your speakers front heavy.

Like with most things in audio, it can be a fools mission to pursue perfection, but springs are probably the way to go if you insist. Otherwise rest easy in the knowledge that even bits of soft rubber can offer huge improvement in isolating the baffle from unnecessary resonance.

Since Sorbothane is measured in shore durometers it shouldn't be too difficult to mix and match to get decent isolation. For anyone with kids, don't forget to spoil their fun by preventing any unnecessary wobbling by placing some wedges underneath!
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