Under my tower speakers -- Isoacoustics Gaia, other options?

Or get some 2” restaurant pads, ones that the,cooks stand on all day, spikes would sink in and never move. 
 

I used racketballs in my rack years ago, worked a charm, and your not getting taken advantage f by the eejits who say “use our modular half circle moon isodampening pads, they will make the music reach out and lightly stroke your ears and neck like a bunny fart. 
use your own ingenuity.  Plus. U have brag rights of saving hundreds of dollars for which you and your wife can get a nice steak and blue cheese med. rare only!

Don’t waste your hard earned money.

buy some racket balls, cut in half, put,speakers on them with slightly,larger fine grit sandpaper under the racket balls.off the,floor, and not like the bass will resonate concrete. Or tennis balls, or go to a home store and buy 2 cutting boards for the,speakers. Have my,amps 1 each on a very thick cutting board, which I threw 5 coats of cherry stain n them, they,look nice. Don’t drop that kind of money on snake oil.

Home Depot, get some large flat stone squares for the speakers, use normal cutting boards, nt inflated prices by some greedy snake oil douche.

https://www.bedbathandbeyond.com/store/s/cutting-board

Thank you, thought floor was bare concrete. Which,would benefit from a block or a thick rubber pad.

the racketballs sure helped,dampen,vibrations in my rack