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Acousta-Stuf Polyfill Speaker Cabinet Damping Material 5 lb. Bag
I am building a 3 cubic foot subwoofer cabinet (with Dayton Audio SPA1000 1000W Subwoofer Plate Amplifier and Dayton Audio UM15-22 15" Ultimax DVC Subwoofer)and would like to know if two 1lb bags of poly-fill would work ok instead of 1-1/2 lbs?
Yes 2 pounds will work just fine for this subwoofer. You can always remove some if you would like, but I doubt you will notice any difference in the sound.
Date published: 2015-07-22
is this ok for down firing subs?
Yes this will be fine for a down firing application.
Date published: 2015-03-11
Would you recommend this product or egg crate for a transmission line subwoofer?
I would recommend Acousta Stuf for a transmission line type enclosure.
Date published: 2015-01-12
What is the volume of bag?
A 5lb bag of polyfill can accommodate up to a 10 cubic foot enclosure. Recommended use is 1/2 lb. per 1 cu ft.
Date published: 2014-10-09
Would using acoustic foam be better if it has a better absorption capabilities than Polyfill? Is there any RAL measurements on Polyfill that I can compare to acoustic foams on the market to compare effectiveness?
Acoustic foam is excellent for damping the walls of a vented enclosure, whereas Acousta Stuf or polyfill is used in sealed enclosures for changing box Q and absorbing midrange back wave.
Date published: 2014-03-07
Making enclosures seem larger formula
Is there a formula for how much Polyfil results in an effective increase in enclosure size? I have a sub that wants 1 cubic foot. Can I make it work in an enclosure of .7 using enough polyfil?
I'm certain that you could calculate that if you had info on all of the known variables. The problem is that you would have to know exactly where each strand of polyfill is in the cabinet to know how it would physically interact with the sound waves being sent into the enclosure by the driver.The layman's way is to simply add 10% to the enclosure size for a sealed enclosure loosely stuffed with polyfill. Also note that you can overstuff for negative effects, and I personally don't like to use polyfill for ported designs. For those I like to line the walls with egg crate foam or better quality foams (I have heard carpet padding works as well).So aside from a very complicated calculation that would require computer assistance, just add 10% to your enclosure size and don't overstuff.
Date published: 2012-05-30