Try some sorbothane circle discs (correct size and weight ratings per component) on all your gear and you will be SHOCKED how much better it will bee
I used the 2.5" x 0.5" 30 duro units for my nx otica between the base and the floor....amazon isolate it! brand. I have them on granite slabs, but you can do the sorbotane between the base and the floor. Try the small sorbotane discs also under the crossover and it also makes a huge difference. Put under all your electronics too. You will be BLOWN AWAY.