Isoacoustics products seem to be among the better engineered and performing isolation for speakers and the Iso-puck is a bit more cost effective than the Gaia series, whilst using the same technology. Whether combatting wooden flooring or general desire to improve speaker performance…
I have four pair new, sealed in box, which will support two speakers up to 80 lb (36 kg) each. I’ll sell the lot for £160 delivered on UK mainland.