Best isolation device for a tube pre-amp

tried the bicycle innertube sandwich that soundstage.com raved about and it was TERRIBLE. bass was slow & muddy.

everything improved substantially when i put hard cones under the pre which sits on an MDF shelf on a rack. look at blackdiamondracing and TG audio for starts and use a weight on top the pre as well...that ought to isolate it very well w/ no adverse effects.
rhyno

I agree with Rhyno on this one, as I use Nordost Pulsar Points under with lead weights on top of the pre. All on a 1.5" MDF shelf; increased width, hieght, depth, brought things into focus; but most importantly increased micro and macro dynamics, which brought the performance to "life"; helped me connect more. Increasing the PRAT and boogie factor helped me connect more as well. I haven't heard the titanium versions, but the aluminum PP's worked wonders. PP's and MDF are great combo. Tg Audio's cones (also aluminum) I bet would work well also. Perhaps with the points up if mass loaded?

Use a good,solid stand.For tubes get Black Diamond Racing Cones #4's For S.S. try the #3'sI tried Vibra-Pods,stock feet and J.A.Mitchell cones.The best by far were the B.D.R. cones.They opened up the soundstage,deepened and tightened bass and just sounded nicer overall.You can pick up 3 here on AudiogoN for $45 used.. $60 new.....dave99

An empty box Of Montecrosto #4 works well.Put the cigars in the Humidor and fill the box with silica sand.Place it on top of the pre amp.Works great.

Aurios MIB by a long shot. And while you're at it bypass any crappy mdf shelf with a maple cutting board or block of maple.