the isoacoustic Gaia are very good but the Townshend podiums are a whole different level better and that's from people that have tried both but the Townshend podiums are three times the cost and all I can tell you is when I put them under my speakers it sounded like I changed all my electronics too much more expensive gear. check them out, they got to try it like it or return policy, the company told me that they've never had a pair of podiums ever returned.
Inside the Iso Acoustics mechanism
So what us inside the device? Springs? Dampening material or a combination? Thanks