What isolation feet under your amp with great result?

Herbies Tenderfeet are a good cost-effective footer.

I've replaced my Herbies with DH Cones. They are ceramic and sit under the component with the point facing down onto a hardwood platform such as maple. They do not colour the sound.

As an update, the EVP's are working well under my Audio Note preamp. Music is more transparent and uncolored than with Herbies Tenderfeet.
Bass is now tight as well. An affordable way to decouple a component.

Agree. Sorbothane absorbs vibration but softens the sound. Also can leave a residue under a hot component.

@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.

@t_ramey 
EL84's...Nice amp. I am looking for more detail and realism from my preamp. It's a choke point in my system, all other components have been successfully treated with footers and platforms.
The limiting factor with the pre is I only have room for 1" footers due to shelf space, so I'm going to give the EVP's a try. Many thanks.

Squeek_king, I see they make a short footer, but it's more than I want to spend. Thanks.

@jriggy  yes, it proves YMMV. I'm looking for lively. Thanks for the thoughtful reply.

@jhills  +1 for the spikes into maple platform.
Between the maple and shelf I use a gel type material which gives me a floating platform.

Re: wood blocks. I used a ayer of cork under the Myrtle blocks. I still had the tight bass and open soundstage, but highs remained harsh. I think the vibration of the component passes to the wood, then back to the component chassis.

@mitch2 
That's very expensive to decouple your speakers. The Owens Corning sounds like an interesting project. Maybe you'll discover the secret sauce inside the EVPs.