Herbies Big Fat Black Dots are an excellent interface material. I use them between the lower and upper modules of my VSA VR4JR speakers with a significant improvement in clarity and dynamics and use them also for my monitors on stands. They come with a money back guarantee But I'd guess you won't part with them once you give them a try.
A very inexpensive alternative is to use V-Pads available from heating and air conditioning suppliers for about $3 @and are identical to Mapleshade IsoBlocks.
I found each of these approaches vastly superior to blue tack.
A very inexpensive alternative is to use V-Pads available from heating and air conditioning suppliers for about $3 @and are identical to Mapleshade IsoBlocks.
I found each of these approaches vastly superior to blue tack.