Polyfill in a push/pull subwoofer? - AVS Forum
DIY Speakers and Subs > Polyfill in a push/pull subwoofer?
RTSW's Avatar RTSW 08:10 PM 06-19-2012
I've got a couple of push pull subs and I'm thinking they would benefit from some polyfill as the enclosure isn't that big considering it has dual drivers.

Do you think this would be beneficial for this sub design? If so how would I go about filling it? Since the driver on the bottom of the cabinet is facing up inside the cabinet I'm guessing I'd want to avoid having any polyfill on top of it.

Cheers for any help.

cookieattk's Avatar cookieattk 08:21 PM 06-19-2012
pillows
RTSW's Avatar RTSW 08:56 PM 06-19-2012
Won't pillows be detrimental since they are made of cotton and form a barrier between the enclosure and the polyfill?
Mrkazador's Avatar Mrkazador 01:58 AM 06-20-2012

Use a net to keep the polyfill from the drivers.


A9X-308's Avatar A9X-308 02:20 AM 06-20-2012
Quote:
Originally Posted by Mrkazador View Post

Use a net to keep the polyfill from the drivers.
What he said, or cheap cloth stapled inside to hold it in place. If you can place the cloth over your mouth/nose and breathe through it easily, it's fine.
Bill Fitzmaurice's Avatar Bill Fitzmaurice 07:21 AM 06-20-2012
Quote:
Originally Posted by RTSW View Post

Won't pillows be detrimental since they are made of cotton and form a barrier between the enclosure and the polyfill?
A fabric pillow cover is invisible to long wavelengths.
desertdome's Avatar desertdome 08:25 AM 06-20-2012
Quote:
Originally Posted by Bill Fitzmaurice View Post

A fabric pillow cover is invisible to long wavelengths.
. . . which is why Yoda wears a pillow cover. biggrin.gif
RTSW's Avatar RTSW 08:25 AM 06-20-2012
Awesome, thanks for the responses all.
Up
Mobile  Desktop