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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

Showing 3 responses by lowrider57

lowrider57's avatar
lowrider57
5,418 posts
 
Dont use sorbothane directly underneath the speakers, it will absorb the bass and make it sound muddy and less detailed.
You can use the sorbothane under the granite, then try the speakers using their feet or spike them...see which gives you the clearest bass response. This way the speakers and granite bass will be decoupled from the floor.

And I agree, Herbie makes excellent isolation products. Try what you have on hand first.

lowrider57's avatar
lowrider57
5,418 posts
 
It would probably be easier and you'd get better results if you used a Herbies product rather than an unbalanced granite platform.
http://herbiesaudiolab.net/spkrfeet.htm

I use Decoupling Gliders on my hardwood floor. Heavy brass tip-toes on my speakers sit in the decoupler and there is no resonance introduced into the floor or back into the speaker (as far as I can tell).
Or you could try the threaded stud glider. Seems like many are getting good results with Herbies.
lowrider57's avatar
lowrider57
5,418 posts
 
You should email Herbie if you're considering trying a product. You'll get advice on the best way to isolate your speakers. 
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