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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
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geoffkait's avatar
geoffkait
23,365 posts
 
I find Sorbothane to suck the life out of the sound. There are materials that look just like Sorbothane I have used in the past that really do work, especially in viscoelastic damping situations. I have also used some other similar materials that didn’t work. So I guess you never really can tell just by looking at the stuff.
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asahitoro OP
244 posts
 
Thanks for the input geoffkait,

I was wondering about Sorbothane, Vibrapods and the various Herbie’s offerings and what materials are being used? I have some 2.5" diameter x .25" high 70 duro sorbothane discs and I also have a bunch of various Vibrapods that I could use under my KEFs feet (which are about 1.75" diameter). Now I’m thinking use the sorbothane discs under the granite tile slabs (which are .4"ish thick) and then the KEFs with spikes installed in the brass feet on top of the granite. Again, it’s a tile holllowish floor underneath. My KEFs sounded really good at my last place with just the spikes through carpet on a solid cement floor.

At any rate I have a bunch of stuff to try and I’m also not against tossing some coin Herbie’s way. One thing about his cone/spike decoupling gliders, and lets face it, aesthetics matter, is that they aren’t too visually appealing for where I’ll be putting them. Also, they may look a little strange as the diameter is much less then the KEFs feet.

Thanks again for the input everyone. :)
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