If you want to go on the cheap, a good home-made isolation platform that I have used for years is to buy several wheelbarrow inner tubes at your local hardware store and a large cement paver block. Place the block on the inflated inner tubes and your turntable on that. Sounds silly, but I learned this trick in graduate school where we needed to isolate a monolayer trough from building vibrations and my graduate advisor had me do the same thing (he was cheap). I tried a lot of other solutions but nothing worked as well as the massive block on the tubes. I think there are some commercial products such as the Townsend Audio Seismic Sink and others that use this principle but will cost you a lot more. Good luck.
Isolation Platform for my Sota Cosmos?
Delving into the murky waters of all things Isolation Platforms to complement my Sota Cosmos turntable to try to understand which - if any - isolation platform would work best with my Sota Cosmos turntable - which is a suspended turntable. The Cosmos already has great isolation qualities so i am wondering if there is actually anything out there that could improve the sound quality from this TT. Any suggestions? Thank You