Any Way To Damp Ringing Stands Without Adding Weight???

I had to dampen my thin and ringing old Lovan Classic stand (which was to hold up a big new turntable).

I didn't care to pour crap of any sort into the poles.  So  I lined both the insides of the metal shelf bracing, and the vertical poles, with this sticky sided sound damping material:

https://www.acousticsciences.com/products/wall-damp

Whatever I lined with that stuff really stopped ringing.

I also had a bunch of this stuff left over from my trials in sound isolation for my turntable stand:

https://www.amazon.ca/Isolate-Sorbothane-Vibration-Isolation-Square/dp/B0042U92TE/ref=pd_sim_469_4?_...

So I cut up chunks and stuffed it into the hollow poles of my stand.  (A lot less messy than pouring any fine grained particles).  The result is a very dead sound when rapping anywhere on the treated stand.

When I put my Solid Steel stand together, I noticed there was acoustical foam inside each tubed pillar.  It is dead quiet.

Do not use kitty litter ever. Construction foam is a good idea or bean bag chair filling, small round Styrofoam marbles.

Try some constrained layer damping material like they use in cars to quell road noise. It can be applied to sections that aren't visible or noticeable. You needn't cover the entire surface, just some portion and it can deaden entire sections of surface. It has an adhesive side and you can cut small strips, adding more until you're satisfied.

All the best,
Nonoise