Vibration Control for Lightweight Tube Components

I only use four of the moongels at the corners. Try it that way and see if it changes. You mentioned earlier you use the Herbie tube dampers I believe. I use them too and prefer them. I run my dampers all the way to the top. If you have them in the middle try moving them up if there's room or completely off.

Maple is definitely a softer wood and just like drums it will be a little warmer sound. Bamboo is very rigid and dense. The moongel pads are doing the fix more than the bamboo shelf I suspect. Try the moongels only; directly under the stock feet or your preamp taking the shelf out of the mix. Try the other tweaks noted above first.

Definitely agree with r_f_sayles last post. Give it some time. 

Lowrider, I really don’t know the answer to that question in terms of  the dissipation of vibration stemming form floor to equipment via a rack. The bamboo platers have greater density and are thinner. The maple shelves I use are much thicker, though less dense. Those more knowledgable in mechanical impedance might shed a light on this. I believe we are asking, can a mechanical ‘ring’ be translated to an electrical one by the forces generating the mechanical one.

It is a good thing I only think of these things when on computer, not when listening to my system. Need to spend more time with system, not computer. 

Still enjoy this thread!

@bpoletti, I put Vibrapods back under the preamp, and it sounded warmer, but there was a loss of low-end detail. The Isonodes are superior.

@r_f_sayles, I appreciate your advice. Yes, the sound is new to me and I had a long listening session today. I don't mind the neutral timbre the bamboo brings to my system, but there is a characteristic that is a problem. CD's now have an "edge" in the higher frequencies; eg, cymbol crashes do not sound realistic.

 Trying some wood blocks under the chassis is a good idea. I can say for certain that the change in timbre is due to the wood and not the footers, because I previously tried the Isonodes on the pine shelf and they were completely transparent. In other words, the preamp on pine sounded warm and lush as usual, but with more detail than other footers.

Low - have you tried Vibrapod cones on top of Vibrapod pucks?