so uhmm.. wat exactly does this do? does it help any?

 

you mean putting stuff into a ported box?

it helps with airflow in boxes that have either too much airflow and will help in sound. almost a semi-sealed box in a way...

 

yea! nd on a sealed enclosure too! hmm.. idk.. apparently.. it makes it so the sub thnks its a bigger box? i dont get it? wats the benefit?

 

having a bigger box changes the resonance in a box, just like how people prefer to have GIGANTIC boxes vs. people that like to have small boxes that fit the same sized woofers. while the hit may be a bit harder with a bigger box, the accuracy of the hit is sacrificed, and vice versa.

i personally dont have any fill in my box just yet, but once i make a new one and if its less than the recommended size (for a CVR12 sub it recommeds 1cf of space) then i might use poly fill to make it seem like it will acommodate to get 1cf.

all this is to my understanding of poly fill, so please do take this with a grain of salt

 

lol! i dont even know wat poly fill is.. cuz i was talkin to my buddy he just stuffed some bubble wrap in there! lol! so i dont know? lol!

 

bubble wrap is only going to take away airspace.... IF you want to put some stuffing in your box - use poly-fill... it is in the pillow section of Wal-Mart - used for homemade pillows...kinda like cotton only synthetic..


What poly-fill does is absorb / slow some of the waves down inside a box in order to make the sub perform as if it were in a bigger box... most people use it just because and they can't tell a difference...some people who are very serious about audio can tell a difference in a stuffed and empty box..

 

Here is a good article on poly fill...

http://www.moodym.com/audio/fiber.html

 

BTW, bubble wrap not such a good idea.

 

the techs at the audio shop where i bought my 1.5 cf sealed enclosure said that stuffing an enclosure of that size would DETRACT from sound quality. however, they did say that stuffing a 1 cf enclosure MAY lead to better base. i dont really see the point... i payed an extra 10 bucks for the extra .5 cf, and to me that was the best way to go. all personal preference i suppose.

 

It depends on the sub. Different subs require different amounts of airspace.

 

o!! i see.. so do i have to tape down the poly fill?? im thinking maybe i shoud do this.. but im no t sure yet as to how... how much do i need??

 

from all the boxes ive seen, ive never seen the poly fill in there tapped down. its just kinda in there.

 

It depends how big your box is. The best advice I can give is use your ears. Put some in there and then listen, put some more in and listen and so on and so on. All the formulas are great, but at the end of the day it comes down to whether you think it sounds good or not. Trial and error works great, its not like once you put the poly fill in there you can't ever take it out again.

good luck

 

cool! thanks guys! ill do it this week or sumthin.. lol!

 

It's cheap enough at like 1.49/bag to just give it a shot and see if you can tell a difference in the sound. A lot of people buy subs that are too big for the box or a box that is too big for the subs. Polyfill helps remedy the the issue with the box being too small. Really good for trunk floor installations where space is tight and you don't want to raise the floor.