Lead shot questions

i may be wrong but if you put lead shot inside speakers that were not designed for it you are taking away from the internal volumn of the speaker as it was designed.

Another problem with lead shot is lead dust. If your speakers are vibrating the lead shot, it is certainly creating lead dust, and that could be a grave problem when you sell the speakers. Even if you removed the lead shot, removing the contamination would be very hard.

Very good points and ones that I had not thought of at all.

I saw an add here a few days ago for very small stainless steel discs. I suppose the steel wouldn't create dust like lead. At the very least, it wouldn't be as toxic.

If I remember correctly steel weighs approximately 4oz per cubic inch. Discs would be less, since there is some air space, say 20% less. Hmmm, 100 cubic inches for 20Lbs as a guesstimate. That's a fair amount of volume, 4 to 5 percent of my speakers internal volume, certainly enough to have some acoustic effect.

Nonetheless my curiosity is still piqued.

UNless I miss my guess, mass loading usually involves the stands, or placing bags of the shot or whatever on top of the device, not inside. As for steel, its magnetic and so I don't think it should go inside a speaker with a magnet. As for lead, it highly toxic and I sure wouldn't want it loose anywhere in my home. Bagged only, I say. YMMV.