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Acousta-Stuf Polyfill Speaker Cabinet Damping Material 5 lb. Bag
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
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
How big is a 5 pound bag?
Physically, the five-pound bag I looked at is approximately two feet in diameter, and an average of about 10" to 12" deep.
Date published: 2011-06-28
Wanted to buy this to re-stuff my polk Monitor 60`s & CS10 center speaker,will it sound better?
If you use the same amount of fill for each speaker, I don't think it will produce a significantly different sound. However, individual tastes and opinions of what is the "right" amount of stuffing for a particular speaker can vary greatly. Using more or less stuffing can change the sound, whether it would sound "better" to you one way or the other would be a question that only you can answer.
Date published: 2011-09-06