I use a Herzan active vibration isolation table for my SOTA Cosmos. It made a surprisingly big difference, I thought, when I installed it ater 3 years of using the Cosmos on a heavy walnut shelf/rack. The unit has lights that show you when each of the different axes of active isolation are actually in use, and they really only go on when I am playing at loud levels with a lot of bass energy. The main table seems to be a heavy aluminum plate on tuned springs, and by itself it makes a clear difference. It just upped the level of transparency in the musical presentation, removing some consistent colorations/resonances that were overlaying the playback. And I could also clearly hear deeper into the music.
I stumbled upon two of these tables on Ebay 6 years ago, mis-labeled, and I bought them for ~$800 total, otherwise I probably would have a hard time justifying them. When they arrived at my workplace on a pallet, we hauled them onto some welded steel tables in our Lab, plugged them in and let them warm up. I then poured 4 cups of water and placed one each on the two Herzan tables, and one each on either side on the Lab tables. I then "tympani rolled" the table tops with my fists and the water danced out of the cups sitting on the Lab tables, but you saw no ripples on the ones on the Herzan tables. I howled with delight! They sure seem effective.
I stumbled upon two of these tables on Ebay 6 years ago, mis-labeled, and I bought them for ~$800 total, otherwise I probably would have a hard time justifying them. When they arrived at my workplace on a pallet, we hauled them onto some welded steel tables in our Lab, plugged them in and let them warm up. I then poured 4 cups of water and placed one each on the two Herzan tables, and one each on either side on the Lab tables. I then "tympani rolled" the table tops with my fists and the water danced out of the cups sitting on the Lab tables, but you saw no ripples on the ones on the Herzan tables. I howled with delight! They sure seem effective.