About the Polyester Fiber Stuffing
The sound wave coming off the back of your subwoofer reacts with the air contained in the box. Polyester fiber stuffing slows down sound waves inside the box, making the subwoofer perform as if the box were bigger. Use 1 to 1-1/2 pounds of stuffing per cubic foot of box volume.
What's in the box:
Polyester Fiber Stuffing owner's manual
- 1 pound of Polyester fiber stuffing
Featured review
I couldn't tell a difference but it was cheap and easy.
Brian from Riverton, UT
Customer Q&A
Q
how do I put this in the box? do I just stuff it in or do I need to like staple it down in the box? thanks
A
Just stuff the correct amount in the box.
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REVIEWS
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Polyester Fiber Stuffing reviews
Average review:
Customer photos
Good stuff
Crutchfield customer from Newnan, GA on 8/4/2019
Great stuff. Used it in the factory location for my mini-sub. Seems to help the sound quite well.
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0 of 0 found this helpful
Polyester Fiber Stuffing
Crutchfield customer from Spring, TX on 7/1/2019
Really made a difference in the sounds quality
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0 of 0 found this helpful
Polyester Fiber Stuffing
Crutchfield customer from Seattle, WA on 6/11/2019
Just like stuffing from the fabric store, good stuff. Word of caution, when drilling the sub mounting holes in the box the stuffing got twisted through the holes and wrapped around the drill bit - i'm sure seasoned pros know how to avoid this but being my first one i was a touch frustrated since you cant fully tear off the stuffing that pops through the holes. Oh well, its in the trunk and out of sight!
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0 of 0 found this helpful
Great for sealed enclosures.
Crutchfield customer from Angleton, TX on 5/12/2019
It's polyfil. Nothing fancy here. It does make the box go boom (in a good way).
Pros: Very easy to install.
Cons: None.
1 of 1 found this helpful
Polyester Fiber Stuffing
Brian from Riverton, UT on 5/2/2019
I couldn't tell a difference but it was cheap and easy.
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1 of 1 found this helpful
Polyester Fiber Stuffing
Crutchfield customer from Athens, AL on 4/24/2019
0 of 0 found this helpful
Polyester Fiber Stuffing
Crutchfield customer from Lakewood, CO on 4/15/2019
good size bag, more then enough for a speaker box.
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0 of 0 found this helpful
Polyester Fiber Stuffing
Crutchfield customer from Moosic, PA on 4/1/2019
0 of 0 found this helpful
I guess it works
Crutchfield customer from Houston, TX on 4/1/2019
They sent the perfect amount of filling for my box. I think it makes the sub sound better but I have no proof of this besides the subs performance thus far. I'm using one 10" Q class kicker and it does sound larger than it is
Pros: Inexpensive
Cons: None
0 of 0 found this helpful
Polyester Fiber Stuffing
Adam from Roseville, CA on 2/10/2019
0 of 0 found this helpful
Polyester Fiber Stuffing
Ed from Byron, MI on 2/5/2019
Stuff is easy to install. My box and speakers are just about the recommended volume so I can hope this will help to make the bass seem like it's in a slightly bigger box...
Pros: Easy
Cons: None known
0 of 0 found this helpful
Polyester Fiber Stuffing
Crutchfield customer from Palmyra, NE on 12/12/2018
I bought a different vehicle & Im limited to space. I used my previous subs in a new box that is custom made for my vehicle. I needed to increase my air space by .45 cubic feet. In my case this did help a little bit. I'll probably end up buying subs that match my box.
Pros: Easy to use
Cons: Isn't a magical cure.
0 of 0 found this helpful
Polyester Fiber Stuffing
Nicholas from Indiana on 12/10/2018
Its poly fill. Not much to review on. It works to remove volume and dampen internal noise.
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0 of 0 found this helpful
Polyester Fiber Stuffing
Michael from Covington, LA on 12/8/2018
0 of 0 found this helpful
Polyester Fiber Stuffing
Crutchfield customer from Fenton, MO on 11/14/2018
Fill those holes. Stuff them. With polyester fill from crutchfield. What did you think I meant...
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0 of 0 found this helpful
Jeep JK
Philip from Myrtle Beach, SC on 9/13/2018
Expensive for what you get Crutchfield has AMAZING prices but this product no. Added to all pods including sub.
Pros: Better sound!!
Cons: Expensive for what you get.
0 of 0 found this helpful
Perfect
Clint from Fort Worth, TX on 9/10/2018
Great stuff! Comes in folded sheets so it's easy to apply!
Pros: Does exactly what it needs to do.
Cons: None
0 of 0 found this helpful
Polyester Fiber Stuffing
Crutchfield customer from California, MD on 6/19/2018
Large amount, plenty to fill most sized boxes. Quality is up to Crutchfield's high standards.
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0 of 0 found this helpful
Polyester Fiber Stuffing
Crutchfield customer from Blaine, WA on 6/1/2018
its stuffing, if it was edible id use it in the turkey next year.
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5 of 5 found this helpful
Polyester Fiber Stuffing
Brent from Litchfield, IL on 4/11/2018
It's polyester fiber stuffing..... works exactly as it needs to and was a convenience to get with the speakers I ordered.
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0 of 0 found this helpful
Buen material y funciona
Crutchfield customer from San Diego, CA on 4/9/2018
Fácil de instalar y le ayuda a la bocina a tener más bajo y claro , nada de eco , lo recomiendo que lo usen en sus bocinas
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4 of 5 found this helpful
Tight, Clean Bass
Freddy from Gilbert, AZ on 2/1/2018
Everyone says Polyester Fiber makes the subwoofer think it's in a bigger box. That's NOT how it works. Polyester Fiber slightly increases the pressure inside a sealed enclosure due to the volume taken up by the polyester. If anything, the increased pressure will make the subwoofer act like its in a SMALLER enclosure, but the filler has a low density, so the volume change is minimal. Additionally, the polyester absorbs the pressure waves coming from the back end of the subwoofer and lowers resonance (vibration) of the enclosure walls. This combination leads to better cone control and the elimination of distortion due to the pressure (sound) waves inside the enclosure (think "boomy" bass from a sealed enclosure). The end result is TIGHT, CLEAN bass. Skip the filler calculators and stuff in as much polyester fiber as you can; just make sure your box doesn't have any leaks! (more pressure inside the box) And to the science-y folks: do you seriously believe polyester fiber inside a subwoofer could cause enough of a temperature change to create isothermal propagation? Come on...
Pros: Fast, cheap, and easy way to increase sound quality.
Cons: None
32 of 34 found this helpful
Polyester Fiber Stuffing
ken from Olney, MD on 1/21/2018
Worked perfectly. Took care of the muddy sound of the dash speakers in my Jeep Wrangler
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0 of 0 found this helpful
great accessory
Michael from Tucson, AZ on 1/15/2018
Works good. Used to fool the sub woofer into believing it is a larger enclosure.
Pros: simple to use
Cons: none
0 of 0 found this helpful
Polyester Fiber Stuffing
Crutchfield customer from Covington, LA on 11/7/2017
0 of 0 found this helpful
Polyester Fiber Stuffing
Crutchfield customer from Cecil, WI on 7/25/2017
0 of 0 found this helpful
It works
Cooly from East Troy, wi on 6/20/2017
It's stuffing. Works great for stuffing sub boxes, 6x9 boxes, whatever your heart desires. Adds a crisp clean sound
Pros: Soft and warm
Cons: None
0 of 1 found this helpful
Polyester Fiber Stuffing
isaac from North Carolina on 5/14/2017
1 of 1 found this helpful
Polyester Fiber Stuffing
Crutchfield customer from Ft Worth, TX on 4/30/2017
Bass sounds a little cleaner. Not magic just polyfill
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2 of 2 found this helpful
Does the job
Michael from Salt Lake City, UT on 4/14/2017
Its polyester fiber stuffing. It makes smaller inclosure sound like it was in a bigger one. Not much else to right home about it.
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0 of 1 found this helpful
Did the job!
Erik from Nicholasville, KY on 1/27/2017
I built a small box cause I had a tight spaces for the install and my sub sounded like a dud! The poly fill doubled my bass and the techs at Crutchfield knew exactly how much I needed to accomplish my goal!
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3 of 3 found this helpful
Polyester Fiber Stuffing
Heath from Albertville, AL on 1/2/2017
Easy to separate and install. Seems to help my speakers "feel" more powerful by creating deeper bass in my sound bar.
Pros: Price, ease of use
Cons: None
1 of 1 found this helpful
Works Great
Joel from Rockledge, FL on 12/29/2016
What can you say, it's fiberfill and it works.
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1 of 1 found this helpful
Skeptical but this stuff works!
Kyle from Hamilton, OH on 10/10/2016
I stuffed 1lb of this stuff in each chamber behind my 12s and it,made a huge difference in the sound of my subs. The bass is deeper tighter and more accurate. Improved my sound 100%.
Pros: Makes bass sound deeper and tighter. Easy to use.
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3 of 3 found this helpful
great product
James from Santa Rosa, NM on 9/25/2016
Nice product, come with plenty of fill, works great
Pros: plenty of product
Cons: none
0 of 0 found this helpful
Polyester Fiber Stuffing
Michael from New York, NY on 9/19/2016
This works perfectly and did exactly what it was supposed to do!!
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1 of 1 found this helpful
It works!
Danen from Visalia, CA on 9/7/2016
This stuff makes a noticeable difference. IF your box is a little too small, it slows down the sound waves and gives you the response a larger box would (hey, we don't all drive SUVs). Also, if you like your bass a little less harsh, it mellows is out without reducing the volume or clarity - just takes a bit of the edge off. I have to think that a bit of dampening of the harshest sound waves has to be good for your speakers - whatever radiates from the back of the cone will bounce off of the hard inner surface of your enclosure and back to the speaker (ported boxes may be different). Reducing that excess vibration seems to me to make the speaker sound cleaner. I've used them on 12" subs, 6 1/2" mids and 6 3/4" coax and like the difference in all three.
Pros: Good price. Some say Quilting Batting or pillow stuffing is cheaper, but I've done the math and it isn't. This stuff is sold by the pound while quilting batting is sold by the square yard in varying weights. Do the math yourself (16 ounces to a pound) and you'll find this material is less money.
Cons: No Instructions: the pictures look like you just wad it up and pile it in. If you fill the box enough, that method should work, but using the recommended 1 to 1.5 pounds per cubic foot of enclosure space, I think gluing it to the inside surfaces (especially the back of the enclosure) is the way to go - it comes in rolled or folded sheets - cut to fit, glue in place with spray adhesive and enjoy.
16 of 18 found this helpful
Polyester Fiber Stuffing
Crutchfield customer from Columbia, SC on 8/24/2016
0 of 0 found this helpful
Decent
Sebastian from Virginia on 8/8/2016
0 of 2 found this helpful
Polyester Fiber Stuffing
JEFFREY J from College Park, MD on 8/3/2016
I have the stuffing placed behind 2 eight inch Kicker Comp RT's in the door sub area on my 2011 v6 Mustang.The bass is even deeper & tighter now.
Pros: It works as advertised.Old school technique.
Cons: Wish i could put my 2 Kicker Comp twelves from the mid 90's in there instead:)
2 of 3 found this helpful
Makes My Single 12" Sound Like 2 x 15's
Rudy from Miami, FL on 4/1/2016
I crammed as much of this stuff into my sealed enclosure as I could. I had to really force the speaker very hard and almost sit on it to bolt down to the box because it was so much polyfill trying to keep the speaker from fitting inside the box, but I forced it to fit anyways . The more the better. Now my single 12" sub sounds like 2 x 15" subs in a ported box
Pros: Makes subs sound way much more louder
Cons: none
0 of 6 found this helpful
Helps with add that extra cubic feet if your box is to small.
kert from California on 4/1/2015
Had a shallow sub box at .50 cubic feet sub needed .75 cubic feet added stuffing and it made up the deference sub sounds great.
Pros: Great sound and money saving option.
Cons: none
2 of 2 found this helpful
Poly fill is a must for anyone
josh from Orange County, CA on 2/16/2015
To get the full quality out of any speaker you must use this product. Bass is more full, mids more clear and trebles more rounded. Excellent price and excellent product.
Pros: Easy for anyone to use, great value for the cost
Cons: none
2 of 3 found this helpful
Helps with small enclosure.
Lee from Mayo, FL on 1/14/2015
It seemed to help add a little umph to the sub.
Pros: Ease of use.
Cons: None
0 of 0 found this helpful
POLYESTER FIBER STUFFING
POLYESTER FIBER STUFFING from HORMIGUEROS, PUERTO RICO on 12/28/2014
For the bass your looking for, you need 3 things a great woofer, box and this polyester fiber suffing.
Pros: Tight bass, better quality sound
Cons: Expensive
2 of 2 found this helpful
IT DOES WHAT IT DOES
Karrmike from Orlando,FL on 12/8/2014
I got 2 12s 1995 Pioneer Impps in a sealed enclosure and let me tell you I had to double up on the dynamat after putting this in the box! I ordered 2lbs one for each chamber and man does it sound good. I love low bass so this worked perfectly and the bass is accurate,not muddy and no delays. I was skeptical at first but I'm telling you GET THIS!!!
Pros: It does what it says
Cons: None
3 of 4 found this helpful
A Must Have!!
Vodo from NY on 10/5/2014
Built a box knowing I was going to use Very limited space but put the Largest speaker I could with High hopes of this working and was NOT Disappointed!!!!!!!!!!! Made this small box SHAKE THE GROUND!!!!
Pros: No brainer.
Cons: None
1 of 1 found this helpful
enlcosure stuffing
airussell1 from Memphis TN on 8/9/2014
This polyester fiber stuffing might be the quickest way to add volume to an enclosure without expanding its dimensions. Product works just as advertised.
Pros: Quick and easy enough, once you figure match the internal volume of your enclosure to the stuffing.
Cons: Could have used a reference to how much is .3 or .7 cubic ft i.e. of this product, and suggestions about optimal installation.
1 of 1 found this helpful
Awesome Stuffing!
Drew M from Pataskala, OH on 5/26/2014
Fantastic product. Great quality polyfill. Came in a blanket type roll that was easy to lay down and trim to size. Much better than loose polyfill competitors. Thick and heavy product that help lower the tone of my subwoofer's driver.
Pros: Density. Blanket style design. Cost
Cons: Waiting for it to come in the mail
2 of 2 found this helpful
Improved Bass
BlameTheBird from Destin, Florida on 4/25/2014
I built a box to hold two 10" sub speakers and to fit under the back seat of my 99 Dodge Ram 1500 extended cab. In order to make it fit under the seat, the two enclosures barely made the inimum 0.80 cubic feet of area that my speakers called for. I got two of these and it worked out, as one order fills 1.0 cubic feet pretty good. And the speakers sound great!
Pros: Maximizes the performance of small speaker enclosures.
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5 of 5 found this helpful
stuffed my box
Mike from Detroit, MI on 4/6/2014
Got the stuff for good measure, put it in the new box, seemed to sound better than my old box that didnt have it. worth a shot, seems to work
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3 of 3 found this helpful
good stuff
very simple to install,makes a sealed box great.
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4 of 4 found this helpful
Does what it says
Crutchfield customer from Iowa on 3/14/2014
Does what it says. Good value. More provided than I needed
Pros: Does what it intends to do
Cons: None
3 of 3 found this helpful
Polyester Fiber Stuffing
Crutchfield customer from Akron, OHIO on 3/11/2014
Fast shipping, good price.
Pros: Fast shipping, good price.
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1 of 2 found this helpful
A Must Have
Joe Joe from houston tx on 3/3/2014
Made my sub hit a lot deeper its a must have for any sealed box
Pros: All thumbs up
Cons: none
3 of 3 found this helpful
Polyester Fiber Stuffing
Crutchfield customer from Montpelier ohio on 1/21/2014
2 of 2 found this helpful
Great Product
Kim K. from Houston on 12/23/2013
I added this stuff to my down firing sub box outfitted with a 10" Kicker CompRT. Without the stuffing the bass was hitting, but was not as deep as I wanted. I added about .4lbs because my box is .4 cubic ft. Now the bass is a little deeper and or faster songs with a lot of double bass it is much cleaner and less over lapping of the bass drum. Overall for the price I think it is well worth it in smaller boxes to get more ass out of it.
Pros: Easy to use. Cheap.
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3 of 4 found this helpful
Polyester Fiber Stuffing
J-dawg from DC on 7/24/2013
polyfill works like it should; keep things nice and tight-
Pros: fluffs and settles nicely
Cons:
1 of 1 found this helpful
Good value
Chan from New Bern, NC on 7/22/2013
This poly fiber will work well if you are filling an small enclosure or if you want to line the inside walls of an enclosure.
Pros: Low price
Cons: The poly fiber is pretty flat and does not expand very well compare to fill an enclosure compare to some other brands of poly fiber.
1 of 1 found this helpful
Good stuffing
Brenyn from Langdon, ND on 6/14/2013
This is a great way to make your subs think the box is bigger than it is. They fill up the box with easy and produce a great sound.
Pros: Great sound, easy to install
Cons: It's hard to vacuum up off of carpet!
0 of 0 found this helpful
This is a Must for all sub boxes
DJB from San Diego on 6/11/2013
If you want your sub box to sound the best. You need to put this in it!! It is worth every penny you spend on it.
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Cons: None
2 of 2 found this helpful
Works great for Sub boxes
Rick A from New Berlin, NY on 5/9/2013
Purchased this a while ago and have used it on several Sub boxes. Used box building software and it told me how thick to apply in the sub boxes. Just use adhesive to glue inside the box. It can help to trick the subwoofer into thinking the box has more internal volume. Worked great with a pair of Infinity subs and with a pair of JL subs. I would definitely buy again when I need to build more boxes.
Pros: Low Price, fair amount of stuffing, Helps to minimize box size
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2 of 2 found this helpful
Polyester Fiber Stuffing
Crutchfield customer from Indianapolis on 5/1/2013
I'm sure this product works well, but I never used it as the box I purchased already had poly fill in it.
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1 of 7 found this helpful
Great on rap songs
C-dub6 from Yuba City, CA on 10/13/2012
Right now I have a 15" kicker comp vr getting 500 watts rms to it and a little over a 2 cubic ft box. I got 2 orders of this and put it in and I gotta say, it definitely works. Just like everyone else is saying it makes it produce a lower sound, makes your car rattle more, and let's you crank more power to your sub without distorting. I found it works great for rap songs. Cuz with a 15", it's always hit the lows well, but the higher frequency rap songs my sub sounded like it didn't want to play them as well. Now with the stuffing it plays those better too. The downfall to this stuff, with my set up at least, is that songs that don't have a lot of bass to begin with get more deadened. Like some rock and classic rock. I have to crank up my bass twice as high to achieve the same sound I had to begin with.
Pros: Substantially increases your bass for rap/hip hop. Good price. Easy to install.
Cons: Kind of deadens the bass on songs that had little bass to begin with like some rock and classic rock. It's like these songs benefit more from the air volume in the box you sacrifice, rather than the stuffing. But it seems you can turn your bass boost up to twice you normally use to and acheice the same sound you had
5 of 5 found this helpful
If you really need it...
PhilSam from Bartlett, IL on 8/5/2012
this price is not what they should charge for this, unfortunetly they do. I have a custom box with 1.332 cu. ft inside vol. with a 300rms MTX 10" subwoofer. I have one or two tracks I usually play to push subs when we get new stuff to see what they are made of. Speaker before stuffing sounded really good, super bassy, and had a strong push you can feel. I ordered a pound (16oz) bag and not enough for recommended volumn. I wanted to see what the material was made of. Soft pillow stuffing is all that it is. I bought a 10oz bag of coarse stuffing and had plenty now. I stuffed the box and I have to say, the same songs, same bass and settings had more of a (bare with me) clean "Bhmmm" and less "Bhaah" sound. I'm lucky to have had the opportunity to try both ways and I am a strong believer that sealed boxes with the right set up can't be beat. This has been a hobby of mine since I could drive a car. Stuff your sealed boxes to solidify your tones.
Pros: Residual sound dampening and muffling. Stuff your box if your not satisfied with your sub. Still not happy? Buy a new sub but, keep it stuffed.
Cons: More is not always better!!! If you pack stuffing in the enclosure too much where it starts to become dense, you are LOSING volumn and Defeating your purpose. My woofer and I cannot tell the difference. Do your homework 1st. I only gave it a 3 because of the price. 5 stars if it were more reasonably priced.
10 of 11 found this helpful
stuffing
ralph from phx,az on 6/9/2012
stuffing works fine would be better to get the right box instead of having to use the stuffing
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3 of 8 found this helpful
Cleans up distortioN
TobeMac from Bronx, NY on 4/11/2012
I gave this product 4 stars, becasue I used it in a ported box and I also think it's a little on the expesive side for what it is. If I would have used it in a sealed box I'm sure I would have given it 5, despite the price. This stuff does exactly what it says it does. I am able to send more power to my 8" Alpine type R ( in a Sound Ordnance ported box), and not experience the distortion that I had before. The sound is cleaner, more accurate and slightly deeper. The difference is noticable, but not drastic. I recommend this product.
Pros: sound is cleaner, more accurate and slightly deeper
Cons: pricey for what it is
4 of 4 found this helpful
Solid Hits.
RickW from San Diego, Ca on 2/4/2012
I got 900 watts going to a Polk 10". It hits
Pros: Good for small boxes
Cons: Should be $2.
3 of 3 found this helpful
So little does so much!!
Kennedy from Columbia, SC on 4/28/2011
I have 2 JL's in tightly sealed box with only .7 ft^3 space, so I thought this would do little to improve my sound. Man was I wrong!! I added a 1lb. to each woofer and I can't believe how much tighter and accurate my subs sound now. Not to mention it really makes it easier when setting up your front stage. WHY DIDN'T I GET THIS 5 YEARS AGO?!?!?
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7 of 8 found this helpful
great upgrade at a great price
Zey from Boca Raton, FL on 10/21/2010
After replacing my entire Bose premium (?) sound system on my 350Z I started having a lot of distortion especially from the sub I mounted behind the driver seat. I started my distortion killing project by spending 2 days on covering the doors and all around the sub box with Dynamat. I got pretty good results, but I was not satisfied. Then I started checking the specs for the sub and sub box and figured my sub box is a little smaller than it is supposed to be comparing the specs of the sub. I decided to get a bigger custom sub box for my sub and installed it behind the seat. Again, I had an improvement but there was still distortion coming out of the sub. I was pretty frustrated after spending about $300 and days for Dynamat and sub box replacement and I started checking for my options and I decided to give this polyester stuffing a try. My sub box is about .7 cubic ft. so I put 1 pound of this stuff in the box and turned the system on. The result is UNBELIEVABLE!!! Distortion was completely gone and I was able turn the volume on a lot more than I did before with no distortion from the sub at all. Don't get me wrong, not only this stuff but everything I did on the system helped to have a nice system. But this stuff made the biggest difference for me.
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12 of 12 found this helpful
Works Great to Fill Body Voids Behind Car Speakers
no7up from Spokane WA on 5/2/2010
I have used this stuff before in sealed subs with great results. So when I needed to take out the hollow-sounding boom in my rear speakers, this stuff really fit the bill. My rear speakers (Dodge Dakota) are mounting in huge empty body spaces, and you could here a terrible booming sound at the resonent frequency of the cavity. I stuffed the cavity with fiberglass insulation in the lower part (they are huge spaces) and topped them off with this stuffing. The result was outstanding! The big boom is gone and all I have is tight clean bass. Now when I add the sub (sealed box on rear seat), it will not have to compete with the big boom - all that's left will be clean bass from 40 Hz to 200 Hz. Highly recommended!
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5 of 5 found this helpful
Stuff you box
Mike from Tampa, FL on 3/3/2010
I purchased this stuffing with my 2 subs and my box. I can surely tell you that the bass is a lot clearer and also hits harder than not having it. I would recommend this stuff to everyonee who wants that added clarity to their subs!!!!
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4 of 4 found this helpful
Polyester Fiber Stuffing
Jaime from Lake Havasu City, AZ on 5/4/2009
This makes bass really nice and crisp. Would recommend anyone to buy
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4 of 5 found this helpful
BIG improvement!
Grimzreaper from somerset, ky on 1/14/2009
i have a sony 10in xplod truck box. when i first hooked it up, it sounded fairly decent, accurate, and handled my hard rck music well. i decided to put some filler in it...stuffed it FULL (the filler was coming out of the speaker cutout! lol) hooked it back up, and the sound was louder, very tight and accurate, and it doesnt distort as much if at all. i HIGHLY recomend this stuff to anyone with a sealed box looking for less distortion, higher volume, and deeper, tighter bass.
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12 of 13 found this helpful
This Stuff Actually Works
Aaron from Bozeman, MT on 8/27/2008
I was extremely skeptical when I ordered this stuffing. I went ahead and did it because it was cheap and the two 10's under the back seat of my chevy truck just didn't sound very good. I had previously had the same two subs and the same amp hooked up in my car in a type 2 trunk box and they were awesome, but in the truck they just weren't very loud and seemed to distort way to easily. I ordered two pounds of this stuffing and it surprised me how big it was when it came in. As I started to stuff my box with it, I thought "man, this is rediculous! There's barely enough room in this box for all this stuffing." But I stuffed it all in because my box is two cubic feet and a pound per cubic foot is recomended. I put the subs back in, and man what a difference! I can turn my system up twice as loud as before with no distortion and much deeper, fuller sounding bass. In addition to being able to up the volume, I was able to turn up the gain considerably on my sub amp. This is the cheapest and one of the best improvements I've ever made to my system.
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28 of 29 found this helpful
Polyester Fiber Stuffing- And some testing.
MidnightCE from California. on 5/6/2007
Using polyester fiber stuffing to 'fool' a subwoofer has long been a widely held belief, that honestly, doesn't really make a lot of sense. I took an 8" subwoofer, and mounted it in a well designed, but slightly too small, enclosure. Inside, I placed the appropriate amount of polyester fiber stuffing. I used a real time analyzer at 12db/oct resolution. (Most are only 3d/octave, this is a very revealing device.) And, I played pink noise from 20-100hz. Pink noise is when every octave of sound has the same energy. I did an A/B test, using this test equipment with and without polyester fiber stuffing. The result? When polyester fiber stuffing is added, a small amount of low end response and overall volume is lost. The same result as robbing the enclosure of airspace. The exact opposite of what it is supposed to do! Polyfill does have its uses - In a completely square box it can break up standing waves.
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53 of 88 found this helpful
Polyester Fiber Stuffing
gameguru1360 from Temple City, Ca on 2/14/2007
Polyester Fiber Stuffing is an old trick used to trick a sub into thinking that the box is larger than it is. I would recommend adding polyester fiber stuffing to sealed boxes although some ported boxes benefit from adding it. For sealed boxes, using the roll or weave polyester fiber stuffing is recommended. For ported boxes, using the rolled polyester fiber stuffing is recommended as the weave will break apart and escape through the port. Recommended amount is 1lb of polyester fiber stuffing for every cubic feet
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18 of 20 found this helpful
One of the components I used in my system
B-rad from Akron, Ohio on 7/21/2006
Once I had my enclosures finished, Type #1 sealed box, one JBL GTO 8" sub per box, .35 cubic foot inside dimension, 200 watts RMS per sub, I put the Polyester Fiber Stuffing in one. I read a review on the website that said the it made a huge difference between a box with and without it, so I had to check it. I took both boxes, (one with polyester fiber stuffing and one without), and hooked the subs up to the amp. in my other vehicle since I had the boxes done before I had my amp. wired up in my Jeep. I hooked up the box filled with polyester fiber stuffing first and cranked it up. The sound produced was a tight, kick in the chest pound. I pulled the wires from it and hooked up the one without the polyester fiber stuffing. The sound wasn't as loud and it was muddy. The sub was vibrating and working WAY too much for what I was getting out of it. The polyester fiber stuffing made a HUGE difference in the sound quality of the sub. If I could give this a rating higher than 5 I would. It made that much of a difference.
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28 of 28 found this helpful
Can you feel me,....can you feel me NOW??
Javi from Arlington, TX on 2/15/2006
Recently I purchased about 2 lbs to stuff in a 2 cubic foot total, 2 chamber downfire box that was pre-fabricated to fit in my 2000 Dodge Ram. After a side-by-side comparison of two trucks with my (2)Infinity 10" 1030w's & my neighbor's (2)Infinity 12" 1230W's, there is a BIG difference! With the same exact voltage running to our amps, same voltage cd players, same caps, and everything MINE is significantly louder and deeper. Not only does the bass hit harder because of this Polyester Fiber Stuffing, but you can turn the volume up even more without it distorting. WITHOUT the Polyester Fiber Stuffing the sound from the subwoofer seems to resonate throughout the box and create a hollow effect. WITH the Polyester Fiber Stuffing the sound from the subwoofer is more precise and more air is able to be pushed through the subwoofer cone, thus able to generate more bass. Overall, this is a great product & I would recommend this to everyone with a small or truck box.
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8 of 8 found this helpful
Polyester Fiber Stuffing Fantastic
opsldo from Virginia Beach, VA on 9/14/2005
I bought two pounds for a custom built 52 inch box holding two Kicker Comp 8 icnh subs. I noticed a much smoother and harder hitting bass after I stuffed the two separate chambers. I would recommend this for any custom built box. I think it definitely absorbs the sound waves and my two 8s' now sound better than the two 10's previously had in my truck!
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9 of 10 found this helpful
Great for small boxes!
Raymond from Baltimore, MD on 5/24/2005
I originally purchased 2 lbs of this to fill a box that I built that had over 2 cubic feet of volume. Well I didn't hear much of a difference. Then I Took the Polyester Fiber Stuffing out of my box and used it for my friends box that we had cut apart to make it smaller to fit in his camaro. When it was installed in that box....MAN What a BIG difference! It sounded like the subs were getting an extra 75 watts! Anytime you have a small box I suggest the use of Polyester Fiber Stuffing, especially truck boxes.
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18 of 19 found this helpful
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