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I have new stands and its been 27 years since I last filled a pair. I'm curious what the collective wisdom here has to offer on best results with different damping media. I understand that play sand can be very wet out of the bag. I assume that the advantage to cat litter is that its a hygroscopic clay, so moisture isn't a problem. I think John Atkinson has written or posted about using both sand and shot for a mass-loaded non-homogeneous damped effect. So, please share your preference and experiences, results with the various fills you've tried and save me from re-inventing the wheel. Of note is that the top plates -are- removable in the event that something doesn't work or requires more/less material, I can make adjustments.
TIA
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One reason for using more than one material - and different material at that - is to enable the different materials, density, size, to fill in the voids left by a homogeneous material - and to increase the density/mass in the stand. If you were to use just sand - I might suggest that you use different sizes/grades again to allow a denser fill.
Happy Listening
In Canada they stopped us from using lead a few years ago , although you can still get it .
I've started using ground up nickel that one of the high end shops sell , it works better than a lead sand mix .
Edits: 02/18/13
Aquarium sand works fine.
In 2005 I found in the German audio magazine Stereoplay (12/2005) test measurement results for different fillings for speaker stands. The best result was achieved with steel filings (see the attachment). These results convinced me, so I filled my stands with steel filings.
if your stand has multiple legs, use an assymetrical fill, Fukkung multiple legs with a consistent homogeneous fill creates a single resonant frequency. It is better for sound to use different amounts and kinds of fill for the legs of the stand.
I use some lead shot and top off with crushed sand, fine stuff so that it can fill the space netween the shot. I intersprerse the sand with all sorts of things: woodshavings, beads, nails so that the fill is simply not consistent.
It works for me in direet comparisons to an identical stand uniformly filled.
Sound Anchors, IIRC, uses concrete with a mixture of aggregate in order to also achieve assymetrical fill in their legs of the stand
Stu
An AES paper actually determined that a completely isolated speaker hanging on springs performed better that one supported on stands of any type.
Three most important things in Audio reproduction: Keep the noise levels low, the power high and the room diffuse.
I liked a mix of sand and lead shot. Lead by itself is too heavy for most stands if you want to fill them up.
WW
New Orthophonic High Fidelity
Haven't tried it myself but Noel at Skylan seems to like it.
"Lock up when you're done and don't touch the piano."
-Dr. Greg House
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