Best vibration isolation for speakers on carpet?

I have vandersteen quatros which are a big heavy speaker. I had leveling issues and bass control issues. Started out with the gaia with speaker discs. Midrange was magical but bass still to heavy and still hard to level. I called Richard vandersteen and he told me to get some granite surface plates. They're 3 inches thick and 18x24 or so. They weight an absolute ton but when I put them down they flattened the carpet and made it easy to level the speakers. The speakers are still on the Gaia but are now much more functionally isolated from the floor. Sound is amazing. Looks pretty cool too

Use butcher blocks and gaia isoacoustics

 I used the isoacoustics carpet spikes and didn't like them they were a little unstable. My speakers are very stable now and they are about 80lbs each.

I don’t have carpet. But I used to have my Magico A3s on Isoacoustics Gaia I footers. Then I tried the Townshend Seismic Podiums and that was it. The Magicos are staying on the Podiums and the Gaia Is got repurposed onto a pair of standmount speaker stands. Get the Townshend Podiums. 

if you want the best speaker isolation that stops vibration down to three Hertz and also eliminates the Earth vibration which is constantly shaking your speakers get the Townshend podiums they're not cheap but they are way better than they ISO acoustic Gaia or any of those type of footers and also the podiums stop any room problems as well too, when I put them underneath my speakers and I've got the monitor audio platinum 200 ll it's like I upgraded to much more expensive electronics the soundstage got wider deeper the decay was much more clear everything was better, so if you want the best the Townshend podiums are it they sell direct so if you just Google Townshend podiums you'll find them, John Hannant is a great guy and he'll take good care of you and they even give you a money back guarantee if you don't like them you can send them back I'll never get rid of these from underneath my speakers and he told me that no one has ever sent a pair back that's how significant the difference is.