Isolation platforms for Cube Audio Jazzon speakers

What about symposium?  No drilling, but no guarantee you’ll like the sound better than what you have. Did you ever try them sitting on the floor without a platform?  

Can you put some words around symposium to aid my search?  I can't sit the speakers flat on the floor as they radiate bass from the open bottom of the speakers. 

I looked up your speakers and they have spikes on the bottom to keep them off the floor, correct?  Symposium platforms are stainless steel, so you would have to use a disk under the spikes. Look up Symposium Svelte Shelf and you’ll find it. That aside, do you find that raising the speakers up on a platform improves the sound?  I’ve met so many people who knee jerk into putting platforms and footers under everything and it’s not always an improvement IMO. 

I like Townshend isolation products too as the reviews are universally stellar in the improvements they bring, but they’re pricey as you’re aware.  That got me looking into other spring-based products that may provide similar benefits at a more affordable price point and found these.  They can handle up to 50kg (set of 4) so should work for your speakers, they’re adjustable to customize sound to your liking, users seem very happy with them, and a set of 8 is only $50.  At that price I think they’re well worth a try.  Just another option FWIW, and best of luck.

https://www.ebay.com/itm/134128587790