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Polyester Fiber Stuffing

Make your subwoofer think it's in a bigger box (1-pound pack)

Item # 027808

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Item # 027808

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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:

  • 1 pound of Polyester fiber stuffing

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Polyester Fiber Stuffing reviews

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Good stuff

Crutchfield customer from Newnan, GA on 8/4/2019

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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

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Really made a difference in the sounds quality

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Polyester Fiber Stuffing

Crutchfield customer from Seattle, WA on 6/11/2019

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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

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It's polyfil. Nothing fancy here. It does make the box go boom (in a good way).

Pros: Very easy to install.

Cons: None.

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1 of 1 found this helpful

Polyester Fiber Stuffing

Brian from Riverton, UT on 5/2/2019

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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

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Great product

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0 of 0 found this helpful

Polyester Fiber Stuffing

Crutchfield customer from Lakewood, CO on 4/15/2019

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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

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Does what it's supposed to.

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0 of 0 found this helpful

I guess it works

Crutchfield customer from Houston, TX on 4/1/2019

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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

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0 of 0 found this helpful

Polyester Fiber Stuffing

Adam from Roseville, CA on 2/10/2019

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Added volume to my sub

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0 of 0 found this helpful

Polyester Fiber Stuffing

Ed from Byron, MI on 2/5/2019

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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

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0 of 0 found this helpful

Polyester Fiber Stuffing

Crutchfield customer from Palmyra, NE on 12/12/2018

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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.

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0 of 0 found this helpful

Polyester Fiber Stuffing

Nicholas from Indiana on 12/10/2018

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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

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Works as stated

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0 of 0 found this helpful

Polyester Fiber Stuffing

Crutchfield customer from Fenton, MO on 11/14/2018

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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

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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.

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0 of 0 found this helpful

Perfect

Clint from Fort Worth, TX on 9/10/2018

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Great stuff! Comes in folded sheets so it's easy to apply!

Pros: Does exactly what it needs to do.

Cons: None

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0 of 0 found this helpful

Polyester Fiber Stuffing

Crutchfield customer from California, MD on 6/19/2018

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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

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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

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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

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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

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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

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32 of 34 found this helpful

Polyester Fiber Stuffing

ken from Olney, MD on 1/21/2018

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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

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Works good. Used to fool the sub woofer into believing it is a larger enclosure.

Pros: simple to use

Cons: none

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0 of 0 found this helpful

Polyester Fiber Stuffing

Crutchfield customer from Covington, LA on 11/7/2017

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Works as advertised!! Great produc

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0 of 0 found this helpful

Polyester Fiber Stuffing

Crutchfield customer from Cecil, WI on 7/25/2017

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Makes the bass cleaner and louder.

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It works

Cooly from East Troy, wi on 6/20/2017

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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

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0 of 1 found this helpful

Polyester Fiber Stuffing

isaac from North Carolina on 5/14/2017

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Bass deeper

Pros: Stuffs good great sound

Cons: Nun

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1 of 1 found this helpful

Polyester Fiber Stuffing

Crutchfield customer from Ft Worth, TX on 4/30/2017

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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

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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

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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

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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

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1 of 1 found this helpful

Works Great

Joel from Rockledge, FL on 12/29/2016

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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

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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.

Cons:

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3 of 3 found this helpful

great product

James from Santa Rosa, NM on 9/25/2016

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Nice product, come with plenty of fill, works great

Pros: plenty of product

Cons: none

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0 of 0 found this helpful

Polyester Fiber Stuffing

Michael from New York, NY on 9/19/2016

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This works perfectly and did exactly what it was supposed to do!!

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Cons:

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1 of 1 found this helpful

It works!

Danen from Visalia, CA on 9/7/2016

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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.

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16 of 18 found this helpful

Polyester Fiber Stuffing

Crutchfield customer from Columbia, SC on 8/24/2016

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Does as advertised !

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0 of 0 found this helpful

Decent

Sebastian from Virginia on 8/8/2016

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Neato

Pros: Works great

Cons: None so far

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0 of 2 found this helpful

Polyester Fiber Stuffing

JEFFREY J from College Park, MD on 8/3/2016

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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:)

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2 of 3 found this helpful

Makes My Single 12" Sound Like 2 x 15's

Rudy from Miami, FL on 4/1/2016

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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

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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

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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

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2 of 2 found this helpful

Poly fill is a must for anyone

josh from Orange County, CA on 2/16/2015

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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

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2 of 3 found this helpful

Helps with small enclosure.

Lee from Mayo, FL on 1/14/2015

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It seemed to help add a little umph to the sub.

Pros: Ease of use.

Cons: None

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0 of 0 found this helpful

POLYESTER FIBER STUFFING

POLYESTER FIBER STUFFING from HORMIGUEROS, PUERTO RICO on 12/28/2014

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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

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2 of 2 found this helpful

IT DOES WHAT IT DOES

Karrmike from Orlando,FL on 12/8/2014

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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

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3 of 4 found this helpful

A Must Have!!

Vodo from NY on 10/5/2014

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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

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1 of 1 found this helpful

enlcosure stuffing

airussell1 from Memphis TN on 8/9/2014

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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.

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1 of 1 found this helpful

Awesome Stuffing!

Drew M from Pataskala, OH on 5/26/2014

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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

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2 of 2 found this helpful

Improved Bass

BlameTheBird from Destin, Florida on 4/25/2014

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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.

Cons:

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5 of 5 found this helpful

stuffed my box

Mike from Detroit, MI on 4/6/2014

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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

joe from va on 4/4/2014

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very simple to install,makes a sealed box great.

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Cons:

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4 of 4 found this helpful

Does what it says

Crutchfield customer from Iowa on 3/14/2014

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Does what it says. Good value. More provided than I needed

Pros: Does what it intends to do

Cons: None

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3 of 3 found this helpful

Polyester Fiber Stuffing

Crutchfield customer from Akron, OHIO on 3/11/2014

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Fast shipping, good price.

Pros: Fast shipping, good price.

Cons:

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1 of 2 found this helpful

A Must Have

Joe Joe from houston tx on 3/3/2014

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Made my sub hit a lot deeper its a must have for any sealed box

Pros: All thumbs up

Cons: none

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3 of 3 found this helpful

Polyester Fiber Stuffing

Crutchfield customer from Montpelier ohio on 1/21/2014

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Wrks great made my sub sound deeper

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Cons:

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2 of 2 found this helpful

Great Product

Kim K. from Houston on 12/23/2013

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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.

Cons:

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3 of 4 found this helpful

Polyester Fiber Stuffing

J-dawg from DC on 7/24/2013

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polyfill works like it should; keep things nice and tight-

Pros: fluffs and settles nicely

Cons:

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1 of 1 found this helpful

Good value

Chan from New Bern, NC on 7/22/2013

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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.

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1 of 1 found this helpful

Good stuffing

Brenyn from Langdon, ND on 6/14/2013

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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!

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0 of 0 found this helpful

This is a Must for all sub boxes

DJB from San Diego on 6/11/2013

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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.

Pros:

Cons: None

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2 of 2 found this helpful

Works great for Sub boxes

Rick A from New Berlin, NY on 5/9/2013

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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

Cons:

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2 of 2 found this helpful

Polyester Fiber Stuffing

Crutchfield customer from Indianapolis on 5/1/2013

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I'm sure this product works well, but I never used it as the box I purchased already had poly fill in it.

Pros:

Cons:

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1 of 7 found this helpful

Great on rap songs

C-dub6 from Yuba City, CA on 10/13/2012

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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

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5 of 5 found this helpful

If you really need it...

PhilSam from Bartlett, IL on 8/5/2012

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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.

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10 of 11 found this helpful

stuffing

ralph from phx,az on 6/9/2012

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stuffing works fine would be better to get the right box instead of having to use the stuffing

Pros:

Cons:

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3 of 8 found this helpful

Cleans up distortioN

TobeMac from Bronx, NY on 4/11/2012

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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

Crutchfield response on

4 of 4 found this helpful

Solid Hits.

RickW from San Diego, Ca on 2/4/2012

Verified customer (What's this?)
Verified employee purchase (What's this?)

I got 900 watts going to a Polk 10". It hits

Pros: Good for small boxes

Cons: Should be $2.

Crutchfield response on

3 of 3 found this helpful

So little does so much!!

Kennedy from Columbia, SC on 4/28/2011

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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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Cons:

Crutchfield response on

7 of 8 found this helpful

great upgrade at a great price

Zey from Boca Raton, FL on 10/21/2010

Verified customer (What's this?)
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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.

Pros:

Cons:

Crutchfield response on

12 of 12 found this helpful

Works Great to Fill Body Voids Behind Car Speakers

no7up from Spokane WA on 5/2/2010

Verified customer (What's this?)
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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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Cons:

Crutchfield response on

5 of 5 found this helpful

Stuff you box

Mike from Tampa, FL on 3/3/2010

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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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Cons:

Crutchfield response on

4 of 4 found this helpful

Polyester Fiber Stuffing

Jaime from Lake Havasu City, AZ on 5/4/2009

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This makes bass really nice and crisp. Would recommend anyone to buy

Pros:

Cons:

Crutchfield response on

4 of 5 found this helpful

BIG improvement!

Grimzreaper from somerset, ky on 1/14/2009

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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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Crutchfield response on

12 of 13 found this helpful

This Stuff Actually Works

Aaron from Bozeman, MT on 8/27/2008

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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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Cons:

Crutchfield response on

28 of 29 found this helpful

Polyester Fiber Stuffing- And some testing.

MidnightCE from California. on 5/6/2007

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Verified employee purchase (What's this?)

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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Cons:

Crutchfield response on

53 of 88 found this helpful

Polyester Fiber Stuffing

gameguru1360 from Temple City, Ca on 2/14/2007

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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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Cons:

Crutchfield response on

18 of 20 found this helpful

One of the components I used in my system

B-rad from Akron, Ohio on 7/21/2006

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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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Crutchfield response on

28 of 28 found this helpful

Can you feel me,....can you feel me NOW??

Javi from Arlington, TX on 2/15/2006

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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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Crutchfield response on

8 of 8 found this helpful

Polyester Fiber Stuffing Fantastic

opsldo from Virginia Beach, VA on 9/14/2005

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Verified employee purchase (What's this?)

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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Crutchfield response on

9 of 10 found this helpful

Great for small boxes!

Raymond from Baltimore, MD on 5/24/2005

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Verified employee purchase (What's this?)

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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Cons:

Crutchfield response on

18 of 19 found this helpful

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Pros:

Cons:

Crutchfield response

<< >>

More details on the Polyester Fiber Stuffing

Mark G.

Loading accessories...

Customer Q&A

Q
Crutchfield asked: Why did you buy this?
A
It was recommended, so I'm going to use it. [ Christy  Aug 13, 2019 ]
A
i picked up this item because the box i have holds 2 10's and i need to keep the air space as large as i can. [ Justice  Aug 03, 2019 ]
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To get a better beat or sound [ Morris  Jul 04, 2019 ]
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I didn't get it the last time I ordered and should have. [ Will  Jun 07, 2019 ]
A
ultra small box due to location. your description of the product leads me to believe this may help the situation. Hope So! [ David  May 27, 2019 ]
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to contro sound and avoid vibrations in subwoofer box and in doors [ Victor  May 25, 2019 ]
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I have previously ordered this and liked it. [ Porter Harvey  May 16, 2019 ]
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Reviews say it helps the sound, dampen vibration [ Colin  May 06, 2019 ]
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to make the bassmaker make more bass [ P  Apr 08, 2019 ]
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Never used this before, but reviews were really good. [ Emmanuel  Mar 04, 2019 ]
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Just want to fill in any available space in the box so I can get maximum speaker quality. [ James  Feb 27, 2019 ]
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The staff know what I needed. If your not sure take a moment and do a chat with them. [ Brinz  Feb 16, 2019 ]
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I have a small subwoofer box [ Harry  Feb 12, 2019 ]
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put in subwoofer enclosures to make subs think they are in larger enclosures. [ MICHAEL  Feb 06, 2019 ]
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I need it (?) [ Somarie  Jan 26, 2019 ]
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Calvin told me too lol. I needed this to make my box think its bigger since there isn't a box with my cubic air space. [ Danielle  Jan 17, 2019 ]
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suggested by tech adviser to adjust airspace inside subwoofer box to match the selected speaker. [ Eric  Jan 05, 2019 ]
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Hoping it will help with volume in my small custom boxes in my truck mounted sub system. [ Jonathan  Dec 18, 2018 ]
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No idea I guess for behind the speaker in the roll bar [ JUAN  Dec 17, 2018 ]
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Suggested [ Michael  Dec 08, 2018 ]
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god for sub sound [ RYAN  Nov 26, 2018 ]
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Polyester fiber in a sealed sub enclosure will slow sound waves inside the box against the back of the cone creating a clearer bass wave, making better sound. [ KYLE  Nov 24, 2018 ]
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Building a sealed subwoofer box. [ Paul  Nov 21, 2018 ]
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I chose this to fill my factory subwoofer box to help with bass [ TIMOTHY  Nov 19, 2018 ]
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Well I'm thinking since it help some ppl it might help me too and I can send it back if there's no difference [ H  Nov 16, 2018 ]
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Because I want my bass to sound as clean as possible. [ D  Nov 05, 2018 ]
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i made a small subwoofer box and i read that this can help keep the bass frequency low in a smaller enclosure. [ Luis  Nov 01, 2018 ]
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Wanted to try it out [ Chandler  Oct 16, 2018 ]
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none [ RALPH  Oct 07, 2018 ]
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Try it out good reviews [ Skyler  Oct 07, 2018 ]
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To insulate the interior of thee enclosures being built. To help stop standing wave or interior cancellation issues. [ David  Sep 16, 2018 ]
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Better sound [ Philip  Aug 30, 2018 ]
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For a sealed speaker box. [ Jonathan  Aug 27, 2018 ]
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For a factory sub box [ Clinton  Aug 25, 2018 ]
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Not a bad idea, stuff usually has good reviews, so why not try it. I don't have filling in another vehicle where I built two custom 8" sub boxes. [ Vernon  Aug 15, 2018 ]
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I know it's not required to use the stuffing but I desire the best sound possible. [ Bradson  Aug 13, 2018 ]
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For my sub box [ GORDON  Aug 08, 2018 ]
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Game my subwoofer box. [ N  Aug 04, 2018 ]
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My sub box has 0.61 cubic feet of space and the JL subs I ordered need 0.65 cubic feet. This stuffing will make it seem like the box is bigger and make up for the 0.04 cubic feet my box doesn't have [ Jamie R.  Jul 21, 2018 ]
A
to install in sub box [ David  Jul 07, 2018 ]
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to cut back on vibration [ Jeffery  Jun 28, 2018 ]
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to help my subwoofer out [ Francisco  Jun 25, 2018 ]
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Tech Support [ Jeffery  Jun 21, 2018 ]
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Built a custom sub enclosure. Based on recommendations from many articles and websites, need to add poly-fil. [ John  Jun 11, 2018 ]
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Recommended by Crutchfield [ Philip  Jun 04, 2018 ]
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Poly-fill increases the perceived size of your subwoofer box. When building a subwoofer box for a tight area, the fill gives you a little size boost you may not physically have. [ SCOTT  Jun 02, 2018 ]
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Better sound [ David  Jun 01, 2018 ]
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Heard good things about stuffing subwoofer enclosure with poly. [ STEVEN  Jun 01, 2018 ]
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Adding to rollbar and factory subwoofer to hopefully clean up the sound a bit. [ Joseph  May 27, 2018 ]
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I have a sealed box and polyfil will slow down sound waves and trick the sub into thinking the box is bigger [ Michael J.  May 25, 2018 ]
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To put in my sound bar on my Jeep [ Danny  May 21, 2018 ]
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Hogan the advisor suggested it. [ ERNESTO  May 19, 2018 ]
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Suggested by customer service [ Jerad  May 16, 2018 ]
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I have a small custom made box and I want to see if this will improve the sound. [ Jazz  May 14, 2018 ]
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Have a small compartment where the sub box going in my slingshot this will make it sound deeper bass [ pedro  May 13, 2018 ]
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It's the baddest of the baddest man killer dude [ James  May 11, 2018 ]
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Supposed to make subs sound better. Decided to give it a try [ JAMES  May 08, 2018 ]
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Cause my bx was to small [ Kason  May 06, 2018 ]
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Your advice [ Jeremy  Apr 20, 2018 ]
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To put in my subwoofer boc [ DERRICK  Apr 17, 2018 ]
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To minimize vibration [ Charles  Apr 15, 2018 ]
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subwoofer enclosure [ James  Apr 12, 2018 ]
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Improve the sound of my sub in the small factory enclosure. [ Bryan  Apr 12, 2018 ]
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I am hooking up teo amps and I hope this make it easier. [ Raymond  Apr 12, 2018 ]
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Seems like the cheapest best thing for sound dampening. [ Brent  Mar 29, 2018 ]
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MORE BASS FOR MY ENCLOSURE [ MARQUIS  Mar 21, 2018 ]
A
Stuffing to help give the Sub the response it needs in a box that is right at the bottom of the size limits of the Sub. [ Randy  Mar 01, 2018 ]
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for use in the sub woofer box [ Kevin  Feb 27, 2018 ]
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I'm getting a little 8" 300w rms sub and I'm sure I'll need all the oomf I can get [ Troy  Feb 22, 2018 ]
A
I'm buying the best quality equipment so investing a few more dollars to make them sounds their best is a no-brainer. A powerful sub in a small sealed box will sound that much bigger and better with inexpensive polyfill inside the enclosure while retaining the tightness and accuracy that I desire from my setup. [ Noe  Feb 22, 2018 ]
A
Can get this stuff anywhere, it's convenient to have it shipped with everything else rather than go make a trip to the hobby store. [ Frank  Feb 19, 2018 ]
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Recommended by my custom SSV works box manufacture for my jeep as well for my overhead sound pods. [ Anthony  Jan 23, 2018 ]
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To make the sub woofers think they are in a larger enclosure. [ MICHAEL  Jan 18, 2018 ]
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I heard stuffing a subwoofer box with this is a cheap upgrade to the sub's performance. [ Tyler Michael  Jan 05, 2018 ]
A
Better sound [ Liseth  Dec 18, 2017 ]
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Cheap improvement in sound quality [ JOHN D  Dec 16, 2017 ]
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I used box "stuffing" in portet box years ago, now I have sealed box, however Crutchfield says it improves areal woofer performance... [ Gary  Dec 10, 2017 ]
A
Wanted to make sure the subwoofer sounded as good as possible. Fill might be degraded or old in the current stock box or not even there. [ BRIAN  Dec 06, 2017 ]
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sub box was too small [ Lisa  Nov 30, 2017 ]
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To make it sound better [ SAMSON  Nov 16, 2017 ]
A
I chose the fiber stuffing because it states "make your sub feel like its in a bigger box" which I assume means it will have a better sounding bass. [ Brydan K.D.  Nov 03, 2017 ]
A
Fill for factory subwoofer enclosure. [ John  Nov 03, 2017 ]
A
better sound [ B  Oct 13, 2017 ]
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To receive cleaner sound from my custom speaker enclosure [ Micah  Sep 21, 2017 ]
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fiberfill makes the speaker think it is in a larger enclosure. [ MICHAEL  Aug 22, 2017 ]
A
fill for subwoofer box [ DAVID  Aug 15, 2017 ]
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Reliable and good price. [ G  Aug 11, 2017 ]
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Improved cleaner deeper sound! [ Bannon  Aug 09, 2017 ]
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Needed for sound [ STEPHEN R.  Aug 05, 2017 ]
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Just to try. [ MICHAEL  Jul 03, 2017 ]
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It was highly recommended by other customers based on their reviews. [ Jose  Jul 01, 2017 ]
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For my sub box I already have [ Kory  Jun 16, 2017 ]
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Recommended [ joshua  Jun 13, 2017 ]
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I needed it for my new sub and box for my truck. [ Lonnie  Jun 12, 2017 ]
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Seemed like a good idea [ robert  May 17, 2017 ]
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to make a small space seem bigger [ shane  May 11, 2017 ]
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More boom small box [ Jason  Apr 26, 2017 ]
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for subwoofer box [ RICHARD  Apr 25, 2017 ]
A
I chose this item because it is a great addition & I haven't been offered a convenient option to fill an empty speaker mount void before. [ Hanssel  Apr 22, 2017 ]
A
Purchased new Sub Box... it did not have stuffing with it. .so I purchased this fiber stuffing for the new box..... [ TIMOTHY J  Apr 12, 2017 ]
A
I was watching an upgrade video on YouTube and they recommended using this in the front install as there's a sound difference between the sound bar and the front without it. [ Jonathan  Mar 12, 2017 ]
A
Thought I would Try it Heard good things about it. [ M  Mar 03, 2017 ]
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It was recommended after I added two subwoofer to my cart. [ Michael  Mar 02, 2017 ]
A
Better sound! [ belkis  Feb 22, 2017 ]
A
to make my speakers sound bigger and deeper [ Michael  Feb 09, 2017 ]
A
Box is right on the edge of having the min space for subs [ Dominic  Dec 27, 2016 ]
A
Needed this for my subwoofer upgrade. [ Raymond  Dec 21, 2016 ]
A
to see if it helps with sound quality [ rodney  Dec 17, 2016 ]
A
Makes the subwoofer feel like its in a bigger box by slowing down sound waves. A must [ Kent  Dec 12, 2016 ]
A
I chose this to help with the sound of my new sub woofers since the box i had was so small. [ John  Dec 02, 2016 ]
A
going to build a small sub box, [ Paul  Nov 25, 2016 ]
A
To improve the bass response of my sound bar speakers. [ Robert  Nov 25, 2016 ]
A
I just want to try it out ! [ Kurt  Nov 23, 2016 ]
A
to enhance my speaker sound that goes into small OEM housing [ Yoon  Nov 07, 2016 ]
A
Crutchfield stated it made your subwoofer think it was in a bigger box. [ David  Oct 14, 2016 ]
A
I have a two similar set ups with 10" subs, I notice the one with the stuffing sounds better then the one without it. [ Ignacio  Oct 10, 2016 ]
A
Wanted to see if it would the bass tighter and more responceive and the results of this stuff blew my mind my subs sound 100 times better. [ Kyle  Oct 06, 2016 ]
A
To get better sound out of my subwoofers. [ Dennis  Sep 13, 2016 ]
A
To use in a Select Increments center console [ shawn  Aug 25, 2016 ]
A
Putting Mid-bass speakers in door pods that aren't quite up to air volume specs. Hoping this material will help the sound and protect the speakers. [ DanenG  Aug 14, 2016 ]
A
This item really helps make your Sub Woofers in your Sub box's sound so much better. I recommend this minimal investment to anyone looking to get better sound out of there system. Sincerely, Sean [ Sean  Jul 31, 2016 ]
A
I owned a 12" Kicker solo baric L7 and I fitted it firstly without the filling into a ported box and it was good, but then I tried it with the filling and the difference in depth and clarity of notes was very noticeable. I recommend to anyone who cares about having a solid sounding system to fit there box with this. [ Mikhail Salter  Jul 25, 2016 ]
A
Because it works...i still have 2 12"Kicker Comps in a box that i purchased from Crutchfield 1996!!. Will use this fiber stuffing to put into the door subs area in my 2011 v6 Mustang:) [ JEFFREY  Jul 21, 2016 ]
A
Small sub in a small box, chose stuffing to increase its sound quality. It did the trick, and was fairly easy to handle. A little linty, but that's to be expected. Recommended. [ Todd  Jul 12, 2016 ]
A
I read in your site that make the sub thinks is in a bigger box, thanks for the good info. [ LUIS  Jul 06, 2016 ]
A
Used to fill a sub-woofer enclosure. [ Albert  Jun 30, 2016 ]
A
Based on tech recommendation. [ Maurice  Jun 16, 2016 ]
A
Used to fill excessive air space in sound bar on wrangler jk [ tim  Jun 15, 2016 ]
A
i remember as a kid that setting my "boombox" on a pillow or cushion of some kind would make the bass sound much warmer, clearer, and louder. The thought of just tossing my sub in a hollow wooden box seems inferior to a well insulated box. [ Christopher  Jun 12, 2016 ]
A
increase the perceived box volume. I don't have that much space [ Dustin  Apr 28, 2016 ]
A
Had a less than desirable amount of space in my sub box. Using this on a reccomendation from Hogan to help combat my small space issues. Hogan's Bio: http://www.crutchfield.com/Support/Bio.aspx?bio=122 [ Ben  Apr 04, 2016 ]
A
To get a better sound [ Shaunathan  Apr 03, 2016 ]
A
The speaker box i built was slightly smaller and the stuffing will help with the woofer and the quality of sound it will produce. Hopefully enhancing the bass. [ Will  Mar 02, 2016 ]
A
I want my subs to sound better [ Andrew  Jan 31, 2016 ]
A
I built a sealed, square box for a new re audio sub. I bought the polyfill to line the enclosure and eliminate standing waves. [ Nicholas  Jan 04, 2016 ]
A
I needed some polyfill to stuff my sealed box. Since I didn't feel like physically going to the store to find it ,I opted to order it from Crutchfield instead. I figured the polyfill found in stores might be less dense (less suited for car audio), so I decided to save myself the trouble and use my reward points. :) [ Gilberto  Dec 16, 2015 ]
A
Have old subs and boxes for pick need 1 cubic foot I'm about 80% hopefully the poly will help or will have make new boxes [ David  Dec 10, 2015 ]
SHOW MORESHOW LESS

11 questions already asked

Q
My new sub requires 1-1.5 cubic airspace and my sealed box is only .90 cubic airspace . The box fits under my 1997 gmc rear seat, can't go bigger. Will this setup work ok?
[ Charles  Dec 31, 2018 ]
3 answers
A
The stuffing does not increase air space. So no this will not make the box bigger from .9 cuft to 1 or 1.5 cuft. This is best to help reverberating sound waves be knocked down, so to speak, helping the clarity of the sound. Your best bet is to find a speaker that fits the available air space (0.9 cuft) condition
[ bighunt83  Jan 01, 2019 ]
A
Hi Charles, This is one of those cheap things to just try and see how it works. Poly is used in smaller boxes when the speaker requires more volume.
[ chris  Dec 31, 2018 ]
A
Yes it'll make the sub feel as if it has more airspace
[ Gregory  Dec 31, 2018 ]
Q
My new sub requires 1-1.5 cubic airspace and my sealed box is only .90 cubic airspace . The box fits under my 1997 gmc rear seat, can't go bigger. Will this setup work ok?
[ Charles  Dec 31, 2018 ]
3 answers
A
It worked great and made a world of difference with my 15's
[ Erik  Dec 31, 2018 ]
A
Using the fiber stuffing will make the sub think it is in a larger box, and that should make up for the smaller box dimensions you actually have.
[ MICHAEL  Dec 31, 2018 ]
A
Yes it will. You're not going to pack it super tight. It comes in an almost 1 cubic box. When filling you want a consistency of wimpy pillow. You are essentially creating a denser air space inside the the box which causes the inward speaker excursion to be tighter and then the outward movement is freer causing the bass sound wave to explode. Just be sure it is truly a sealed box and not a ported box. I have even used foam gaskets between the speaker and box. The sealed box gives a more natural bass sound than a ported one which is muffled.
[ Michael  Dec 31, 2018 ]
Q
Any difference between this stuff and the stuff sold for arts and crafts/stuffed animals?
[ David  Mar 26, 2018 ]
3 answers
A
It's the same stuff
[ john  Apr 04, 2018 ]
A
I do believe that it is a denser material but thought the same thing when I saw the similar material in a craft store. This product did work very well though but you may want to play with the amount of material you use in the subwoofer cabinet to get the right sound before you seal it shut. Hope this helps
[ Richard  Apr 04, 2018 ]
A
Wouldn't know cause I've never used the stuff from the craft store.
[ DAN  Apr 04, 2018 ]
Q
What about putting Polly fill in for the back speakers in a Ford ranger? They are 5by7s but are in a very small factory spot behind the seat.
[ Clint  May 22, 2017 ]
3 answers
A
I used the Polly fill behind 5x7 speakers in my motor home and it works great.
[ George  May 23, 2017 ]
A
It certainly wouldn't hurt! Give it a try listen and if you like it, than your done. If not you can always pull the Polly fill back out.
[ Harold  May 23, 2017 ]
A
It won't hurt anything to try it. It's possible you could get better tone out of the low end.
[ SETH  May 23, 2017 ]
Q
I have 2 10 inch sub requiring .56 cubic feet per sub, not having any luck finding a box, can I use the poly to fill the 1 cubic foot box to get it close to .56 cubic feet ?
[ Rich  Mar 28, 2017 ]
3 answers
A
When you add polyfill you are tricking the sub into thinking it's in a larger enclosure by slowing the rear waves . It's not used to make enclosure smaller. Hope this helps
[ jacob  Mar 29, 2017 ]
A
I'm not sure it makes a big box smaller, It makes a small box seem bigger. Please ask one of the techs they should know for sure.
[ Roland  Mar 28, 2017 ]
A
Well that is not technically how it works. Polyfill just makes it seem like that there is more air in a box. In order to accomodate for the necessary amount the sub requires. So the answer is a no. Keep looking for a box or switch to a different pair of subs that closely match a box.
[ Juan  Mar 28, 2017 ]
Q
Is it flammable or at least resistant? I've had a sub burn out before.
[ Kevin  Dec 31, 2016 ]
1 answer
A
The Polyfil is made of Polyester which is not flammable and does not ignite easily. I hope that helps. My Bio: http://www.crutchfield.com/Support/Bio.aspx?bio=5
[ Ryan  Jan 06, 2017 ]  Staff
Q
Thinking of putting this in an 8" wedge box with .35 cubic feet. I'll be putting 2 8" RF extreme performance mid-bass speakers in the boxes. Will the stuffing imporove the sound at all or make it louder?
[ Ricky  Nov 25, 2015 ]
3 answers
A
Hi I'm Alan I myself think the stuffing helps make the box not sound hallow or vibrate the box. When you us use the stuffing fluff the stuffing in the box once you have ran the wires to the out side inputs. In general the stuffing makes the bass sound just a bit hard because the subwoofer has back pressure.
[ ROBERT  Nov 26, 2015 ]
A
I've put Poly stuffing in every sealed sub box I've had. Doing so will make your sub perform as if it were in a bigger box. I've found that in sealed applications it produces a harder/punchy/accurate response at the bottom of the frequency range, not necessarily louder. Hope this helps.
[ MICHAEL GREGORY  Nov 26, 2015 ]
A
If you want to use speaker baffling, this is a much better material than fiberglass. Small pieces won't break off that can enter your speaker. That said, adding this material won't make the sound any louder. It typically is used to smooth out the lower frequencies so the music is more natural sounding and less 'boxy or boomy.' Don't stuff the box tight. Use a small amount, pull it to fluff it out, and very loosely fill the enclosure. The effect is more noticeable with larger enclosures with woofers, but even in a smaller box it can make the sound more natural. Hope this helps. Allen
[ Allen  Nov 26, 2015 ]
Q
Hi I have a sealed dual box for two 12" subs. Each chamber is 0.78 and my subs require a minimum of 0.65-1.50 cubic ft. I'm trying to get at least a 1.50 cubic ft per chamber. How much stuffing would I need ?
[ David  Jan 18, 2015 ]
1 answer
A
I forwarded your question to an Advisor and they responded with the following: I'd get 2 packs. You may end up with a little left, but this should be sufficient. If you would like to discuss further you can contact an Advisor directly by phone (1-800-324-9695) or online chat.
[ Krissy  Jan 21, 2015 ]  Staff
Q
Can you use the polyester fiber stuffing with 2 12" JL Audio subs that are in a big ported box? The stuffing won't start coming out of the ports right?
[ Jimmy  Jan 16, 2015 ]
3 answers
A
It works fine in a ported box.
[ Roland  Mar 28, 2017 ]
A
Unlikely to come out the port. Not sure stuffing works well in a ported box though.
[ BRETT  May 05, 2015 ]
A
If you fill the enclosure with stuffing, it should not move. I should also make sure you fill around the port and not inside of it.
[ NORMAN  Jan 18, 2015 ]
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
[ david  Nov 20, 2014 ]
4 answers
A
Just stuff the correct amount in the box.
[ STEVEN  Dec 03, 2014 ]
A
Just stuff it in
[ JOHN J  Nov 21, 2014 ]
A
Stuff it! What size box are you using? Used it in a compact box with a 12" Kicker.
[ JEREMY  Nov 21, 2014 ]
A
David, Personally, I did my best to increase the thickness of the stuffing by lightly pulling on it from different directions. Once it was fluffed up, I gently put into the enclosure trying to not to pack it down and loosely filling the inside of the enclosure. You want the sound waves from the woofer to be slow down as it passes through the fibers. If the fiber is packed to tight it will act more like a wall and part of the sound wave could be bounced back to the backside of the woofer casing distortion and possible reduce the life of the woofer. If the enclosure will be moving around, you might want to spray the inside of the enclosure with Spray Mount or some other types of spray adhesives. To keep the fibers from shifting around. I hope this helps.
[ NORMAN  Nov 21, 2014 ]
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