What isolation feet under your amp with great result?

@jriggy 
I'd like to remove the Herbies and try the EVP's under my preamp. Did you find they were more effective on heavy components? My Audio Note is only about 20 lbs. 
I tried Myrtle wood blocks and there was a major improvement over Herbies, faster attack, open soundstage, but the highs became harsh. Looking for an inexpensive tweak.

@lowrider57 the EVP’s are interesting with a powerful change in sound. I tried them under everything but as mentioned only liked them under my power filter and under an AppleTV (for some certain casual listening). They seemed to show me that a lot of gear is designed/voiced with some vibrations happening. Because with them under most of my gear, the highs freqs, presence and energy to the sound went down. I have Harbeth 40.2’s so I can’t really have anything that deadens the sound and achieve the balance I’m after.
 Maybe if one has a bright or overly energetic sound they would work well. They really do completely eliminate something. But of course YMMV. 

@lowrider57  I have an AudioNote el84 integrated and have tried the cheap isopucks, Daedalus DiD's, and the EVP's and so far I like the EVP's the best. They seem to bring out more detail and realism than the others. I also got the cable lifters from AV Roomservice and for the first time think that lifting cables off the floor are beneficial. Always had negative effects when I tried other methods before. 

I haven't given the DiD's much time so I may try them again under the AN to see if things change.

The EVP's I got were the 2" HD.

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.

I use sorbothane duro 70  in my sandwiches of bamboo,granite,cork,quartz to controls vibrations and resonance with some success at low cost....