yeah well ive researched that fiberfill is probably the best kind to use and probably where polyfill got its name. i figured so just wanted to make sure...
Stapling is the way to go, but you need a very stout staple gun and staples to get into MDF. Fiberfill and Polyfill are two names for basically the same thing... dacron. It works ok but wool and acousta stuff are far better. Don't get the loose stuff, get the roll. Fill isn't really too neccesary for most sub boxes for the simple fact that the boxes are rarely big enough to have standing wave issues anyways. It can tame that bouncy metallic sound character of some boxes though.
Ive read that putting polyfill in the box has nothing to do with standing waves...only to do with producing more heat. Regardless, no matter how many posts on forums ive seen it seems theres no one definitive answer people give. Its always this or that and conflict inbetween.
That is a bit twisted around but true. Standing waves mostly occur at higher bass frequencies than those typically found in a subwoofer enclosure, unless it is large enough. That's why I said that sub boxes rarely have standing wave issues anyways. In full range home speakers, the mid-bass frequencies are more liable to create standing waves, which is why almost every store bought speaker will have some sort of fill in them. In general, you will be fine on most all sub boxes with no fill, short of the ones that are the size of a refrigerator.
