I utilize Svelte Shelves under my floorstanding speakers. I know of a number of other people who do this and they also get good results (tighter bass and improved clarity).
I also utilize an Ultra platform and roller blocks under my preamp. My preamp (ML Ref. 32) has a separate power supply, so it probably does not need much additional isolation. Still, there is some improvement in clarity and dynamics. I've heard really dramatic improvement with the Ultra used with other brands of linestages.
These isolation platforms also have very dramatic effects under CD players.
Like any such tuning devices, you have to experiment. It is possible to dry out the sound too much, particularly with source components. Given the cost, it helps to work with a dealer that will allow you to borrow platforms and roller blocks.
I also utilize an Ultra platform and roller blocks under my preamp. My preamp (ML Ref. 32) has a separate power supply, so it probably does not need much additional isolation. Still, there is some improvement in clarity and dynamics. I've heard really dramatic improvement with the Ultra used with other brands of linestages.
These isolation platforms also have very dramatic effects under CD players.
Like any such tuning devices, you have to experiment. It is possible to dry out the sound too much, particularly with source components. Given the cost, it helps to work with a dealer that will allow you to borrow platforms and roller blocks.