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View Full Version : Help with polyfil?



ThatChevyGuy
03-15-2009, 05:23 PM
Im going to be building a 10 cube sealed box for 4 18" ma audio 181xq
The rec'd specs are 2.5 cubes per sub, so that matches up ok, but how much polyfil would i need to add to make the low end extension greater? Alot? Thread on polyfil?

9BlackN*Black6
03-17-2009, 02:05 AM
1-1.5 lbs polyfil/ cu ft
I just bought 3 lbs for my 3.25, Its going in this weekend.

grooverider
03-17-2009, 02:06 AM
how much difference does it do?

Cabin_Pressure
03-17-2009, 02:12 AM
1-1.5 lbs polyfil/ cu ft
I just bought 3 lbs for my 3.25, Its going in this weekend.

Thats about what i use. Usually 1 bag per cu. ft..

9BlackN*Black6
03-17-2009, 02:16 AM
how much difference does it do?

Ive never tried it, as this is my first big system. Im gonna try it out on my solo x. I got a pretty good ear on how it sounds now, Ill let ya know this weekend, I read that smaller enclosures benefit more from polyfil, makes the sub think its in a bigger box. But we'll see...

Cabin_Pressure
03-17-2009, 02:33 AM
how much difference does it do?

I've gained a noticeable lowend extension by using the 1lb./1cu.ft method. It also eliminated frequency peaks in the enclosure.