The described max load of 10kg per pad is nowhere near these absorbers can handle (40kg total). Under a combined weight of just 18kg which is 4,5kg per pad the absorbers lose practically all of the absorbing capability as they bottom out. They work fine with a load of about 2,5-3kg/pad, no more. So do not try to use these under an equipment weighting more than about 12kg total. I bought these to be fitted under my BKE XLS200 mk2 subwoofer which weights about 18 kilograms and they were useless - all of the vibrations were conducted directly to the floor and I had to replace them with my old Norstone absorbers.
Afterwards I installed Dynavox SDS4 absorbers to my gaming set, under a small Audio Pro Subsoniq subwoofer weighting 10kg at which they work adequately and as promised absorbing the vibrations efficiently.