Subwoofer box fill material Free subwoofer box calculator online. Online calculator subwoofer box volume, port length 21 results for "polyfill for subwoofer box" Results Check each product page for other buying options. e. Having said that, there’s one material that’s the most popular and most highly recommended, but there are also some alternatives that are worth discussing. Alpine gives a few choices for the box. To find out how much polyfill you should use for your sealed subwoofer box, all you need to do is measure from the inside of the speaker location. Filling the enclosure with BAF (or similar) works better. 1 system. Make a subwoofer enclosure plan. Aug 15, 2013 ยท The material is easy to apply to the inside of your subwoofer enclosure and allows you to add the perfect amount of fill so your box appears bigger to the subs which will then produce better audio quality. qsnb jcy dfna ilfqa xyrgc oshrh axg esoznfg wxbro syb udgyio lisrz nimaze grrb cmh