Stereo & Electronics - JL stealthbox stuffed with cotton type filling.. why?

Hi, i recently had to remove my sub to get a replacement, i use the JL stealthbox. When i removed the sub, i realized most of the box was full of cotton stuff. like 80% full. Why would they do this? if i remove it would it make it thump louder?

thanks

it makes the sub think it's in a bigger box. It absorbs the sound waves coming off the back side of the sub and makes the sub sound less "boomy". I have my sub box stuffed full of poly fill. I don't get the SPL's I would without it being stuffed, but I have much tighter and accurate bass compared to a "boomy" bass.

Taking it out will probably make it louder, but it won't be as accurate. It's all in what you are looking for.

ok thanks for explaining. ill try it without the poly fill, and if i dont like it ill put it back in.