What isolation feet under your amp with great result?

Just stick with the Sobothane discs and save your money, $$$ on voodoo feet.
https://www.ebay.com/sch/i.html?_from=R40&_trksid=p2380057.m570.l1312.R1.TR10.TRC2.A0.H1.XSorbothane+.TRS2&_nkw=Sorbothane+disc&_sacat=0

Sorbothane sounds like most very soft things....very soft sounding.

Oh dear! if you think that, then there are a number of different densities 
4 of the 70  durometer density discs will support a 250lb speaker

Sorbothane sucks the life out of the music

I've heard everything now!

Also can leave a residue under a hot component.

Wrap them in glad-wrap, no more than blu-tak does.

Don’t get price reamed with "Audiophile" feet, just get some of these Sorbothane discs or pads in the size and shape you want they range from very soft to hard durometer density for different weights
https://www.ebay.com/sch/i.html?_from=R40&_trksid=p2334524.m570.l1312.R1.TR3.TRC2.A0.H0.XSorbothane+pad.TRS1&_nkw=Sorbothane+pads&_sacat=0&LH_TitleDesc=0&_osacat=0&_odkw=Sorbothane+disc

https://www.ebay.com/sch/i.html?_from=R40&_trksid=p2380057.m570.l1312.R1.TR10.TRC2.A0.H1.XSorbothane+.TRS2&_nkw=Sorbothane+disc&_sacat=0

Cheers George