http://www.mtxaudio.com/caraudio/pro...jackHammer.cfm

Isn't strontium radioactive? Maybe a different isotope?

Indeed - strontium-90 is what you're looking for...

Imagine the power of that sub if the magnet assembly was a neodymium
magnet....


You wouldn't even need bolts to secure it

Why would anyone buy a sub like that!? I would of thought even in SPL
competitions, multiple 15"/12" configurations would move more air...
although that beast does have the added novelty factor of looking like a
nuke or a time flux capacitor lol!