Filling hollow tubes of my component racks

Thanks Stan
I found a Mexican stone mix 1/16"-1/8" in size not really a pea gravel.

Stan what was the difference between the clay and the steel?

Mechans
8 years ago I would have used some old gold coins and just filled the tubes but as they are the only thing worth anything today do you think some old GM stock certificates dipped in West Systems Epoxy and stuffed into the tubes would give adequate dampening.

Stanwal my thinking was clay has no sound of it's own similar to lead(which I don't want to use) and that most metals have some inherent sound they bring to the mix. I thought clay with some stone mixed in for higher weight might be relatively coloration neutral.

Helvec1
How much did you find effective and not over dampen?
1/4 full 1/2 full or more?

Stanwal and Hevac sorry for the delayed response I've been trying different combinations of tubes in the Joules and the C/J(tubes kept going south) and haven't experimented with the cat litter and stone mix in the tubes yet. I'll post my results.

Put 8" of mixed 50% clay cat litter and 50% 1/8" Mexican stone into the 33" tall ROS-4 posts. This amount dampened vibrations most noticeably in the bass but the highs did become slightly cleaner.
Added another 4" to the posts, the highs became cleaner and the bass snapper. So far so good!!!!
Tomorrow I'll add another 4" and hear what I get!

Well it only took one year for me to be ready to move the CD player off the central rack and onto an adjacent rack and fill the tubes to the top!!! This cleaned up the sound from the TT especially the very low end.

Stanwal I will get some Micro Bearings/steel shot next now that I don't have to consider the CDP's sound!!!