I know you are gonna laugh BUT: for isolation under my 85lb speakers (Gershman Avant Garde RX-20), I am using tennis balls inside Tropicana Orange Juice bottle tops! - 4 per speaker (one in each corner). As long as your speaker bottoms are flat - for your speaker weight - I'd experiment with a muffin tin (12slots) with new tennis balls (colors your choice). Your speakers will look like they are on something Post-Modern, designed for a Portland Oregon municipal building in the 90's...
I am sure that die-hard long time audiophiles - wordsmiths all - who contribute one-liners or tomes, should bring a chuckle in reply to my suggestion... But it works for me.
Good Luck to you - and don't be afraid to experiment...
I am sure that die-hard long time audiophiles - wordsmiths all - who contribute one-liners or tomes, should bring a chuckle in reply to my suggestion... But it works for me.
Good Luck to you - and don't be afraid to experiment...