@prof my error, I’d mixed you up with the other thread where the OP was planning to drill a hole in their floor and anchor everything to a single post
Anyway I’m surprised no one has suggested lead shot as a stand filling option. I knew some think the sound is not ideal and it’s obviously risky to work with but it’s readily available and has admirable deadening and weighting properties. It certainly works for me in my Grand Prix stands
I am also a big fan of cup and ball footers under stands such as the GPA Apex footers. https://www.grandprixaudio.com/products/apex They are expensive but can be retrofitted into any standard 3/8-16 .875 threaded fitting (and can also be had in any other size as needed). When I upgraded my amp stands to these it was like the amps suddenly got another 6dB of headroom.
In regard to shelf options I’d get in touch with Ron Heydrich at Marigo. He sells excellent (expensive, think $1000 each) shelves in his proprietary multi layer blend but also has many other options to damp acrylic shelves or even small pieces of his shelf material to go under existing feet and address any issues you may have with your current setup
Anyway I’m surprised no one has suggested lead shot as a stand filling option. I knew some think the sound is not ideal and it’s obviously risky to work with but it’s readily available and has admirable deadening and weighting properties. It certainly works for me in my Grand Prix stands
I am also a big fan of cup and ball footers under stands such as the GPA Apex footers. https://www.grandprixaudio.com/products/apex They are expensive but can be retrofitted into any standard 3/8-16 .875 threaded fitting (and can also be had in any other size as needed). When I upgraded my amp stands to these it was like the amps suddenly got another 6dB of headroom.
In regard to shelf options I’d get in touch with Ron Heydrich at Marigo. He sells excellent (expensive, think $1000 each) shelves in his proprietary multi layer blend but also has many other options to damp acrylic shelves or even small pieces of his shelf material to go under existing feet and address any issues you may have with your current setup