mbolddal, my ProAc`s uses dry silver sand instead of lead shot. But I think it does the same thing. Here is what proAc says, "a small amount of sand will give the bass more warmth, adding more sand to the cavity will give a dryer tighter quality, most people will find that a half to two thirds full is optimum in most models".
If you still have your owners manual check it out for your speakers.
Hope this helps,Jim
If you still have your owners manual check it out for your speakers.
Hope this helps,Jim