View Full Version : How much filler in ported box?

04-08-2014, 04:40 PM
Hey guys, I just finished drilling the holes in a new enclosure for 2 Sundown SA-8v2's. I'm not sure how much or what type of material I should use for filler inside. I've read where some guys used poly fill. I'm assuming that I can get that at a local fabric store. Its going into a portrd box that is
1.5 ^3ft after displacement. Any help would be much appreciated.

04-08-2014, 04:54 PM
approximately none

04-08-2014, 05:06 PM
What do you mean by "Filler"?

04-08-2014, 05:11 PM

04-08-2014, 06:26 PM
I've just read where guys use different material like Polyfill to line the inside of the enclosure to help with the sound. I take it I'm mistaken?

04-09-2014, 05:06 AM
it slows the rear wave and in "theory" increases volume slightly. If your box is built to spec for those subs then it's not needed...

04-09-2014, 09:25 AM
I had made a box for my 6.5 mid bass and filled with poly fil and I can barely hear it now. I may just take it out

04-09-2014, 10:45 AM
A half pound per cubic foot is the norm but in a vented enclosure you don't need to fill. For vented enclosures lining the inside of the cabinet with convoluted foam or insulation can dampen back wave interference but I wouldn't bother with a subwoofer enclosure.

04-10-2014, 11:26 AM
Ok. None it is. Thanks guys.