What's polyester fiber stuffing, and how will it affect my subwoofer's sound?

You're probably already familiar with Dacron polyester fiber-fill — chances are you've slept on a pillow stuffed with this material. But you may not realize how polyester fiber stuffing can help your bass. Stuffing your enclosure with the right amount of polyester fiber can make your box behave like it's larger than it really is. This comes in handy if the volume of the box you've built turns out to be a hair shy of the cubic air space recommended for your subwoofer. Depending on how much stuffing you use, you can actually vary perceived box volume by as much as 30%. You can also "stuff it" if you simply don't have room in your vehicle for the larger box your sub demands. And adding polyester fiber stuffing to any enclosure can clean up your bass by minimizing unwanted box resonances — and at a reasonable cost.  more