Experience Loading Speakers w/ sand or shot

I would be concerned about putting this in a speaker as you have just created an internal acoustically reflective interface in the speaker box and changed the compressability by replacing compressable air with much less compressable sand (air volume modified). This will change the back pressure on the woofer cone and will alter the resonance frequency of the woofer.

I am surprised any speaker manufacturer would actually recommend this (unless the box was designed with space for the sand).

It is also well known that sandy or unconsolidated top soil can turn to liquid during earthquakes (low frequency vibrations).

If you think that having a liquid inside your speaker is good then by all means use sand...perhaps the sound will be more "liquid".

See these two URL's for more info

http://stilton.tnw.utwente.nl/people/rene/animations/3-big03m.mpg

http://stilton.tnw.utwente.nl/people/rene/Granular.html

many countries have outlawed lead shot for the vapors alone.

By selecting appropriate sand grain size then you might be able to tune the sand to sing along with your favorite tracks....

http://www.newscientist.com/article.ns?id=dn8014

LOL

In my Vienna Mozarts, I used #9 shot that I got in 25-Lb bags from a sporting goods store. It is coated with bismuth (or something) so it's a little safer to handle, but use gloves and/or wash hands afterwards - and you only do it once.

"It is also well known that sandy or unconsolidated top soil can turn to liquid during earthquakes (low frequency vibrations)." These materials do NOT turn into a liquid in terms of their physical state - they BEHAVE like a liquid with respect to their motions. Big difference!