Recommend good isolation

I have a set of black diamond racing cones from 5 years ago, are those adequate under my amplifier?

Thanks,
Wig

To kill time waiting for a response, you may want to try and see what you think...

For me the BDR #3 cones worked best under my old ARC CD3MKll. I put BDR #4 cones between my amp shelves and the floor, they helped but Sims pucks gave more inner detail so I would guess Vibrapods might be worth a try under the amps.