Decrease box volume?

[tsenfw]

What's the easiest/fastest way to decrease the volume of a sealed enclosure that's too big for a driver?

Styrofoam or will that rattle and make too much noise?

[jmanpc]

throw some scrap wood in

[BEAVER.989]

throw some scrap wood in

Screw it in place, though.

I know, obvious... but I can't erase the image of loose styrofoam bouncing around inside of an enclosure.