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Poly-Fil PF20

20 oz Polyfil Stuffing For Subwoofer Enclosure Box (Polyester Fiber Fill, Poly-Fil)

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List price $9.99

$5.99

with warranty

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Get More from your Subwoofer!

If you want to get more from your subwoofer, Poly-fil could be the solution you are looking for! Use this polyester fiber fill when the subwoofers box is smaller than what the subwoofer's air space recommendations are. After the installation, the enclosure can appear to be up to 25% larger than what it really is. Using 1 to 1.5 lbs of Poly-Fil for every cubic foot of box volume will be perfect for the box. At Sonic's low prices, adding Poly-Fil to your subwoofer enclosure is a no brainer!

  • 20 oz of Polyester Fiber-fill for sub boxes
  • Adds better bass to your system by making your sub "think" it is in a larger enclosure...get more from your small space!
  • Works great in smaller enclosures
  • Also found as: PolyFil, Polyfill

Product History:

Sonic Sub Boxes PF20 thumbnail
(newest, current model)
Mountain Mist DC20 thumbnail
(previous model, replaced by Poly-Fil PF20 )

Accessories Specifications

Type of Accessory
This is the type of accessory that the item is.
Poly-Fil
Primary Color
This is the main color of the item.
White
Vehicle Manufacturer Compatibility
These are the vehicle manufacturer's that the item is compatible with. Although a manufacturer might be listed here, please verify that your specific vehicle will accept the item or part.

Specials with this Item

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Warranty and Return Policy

Parts Warranty Duration
Not warranted
Labor Warranty Duration
Not warranted
Warranty Provider
Manufacturer

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
84%
4 Star
12%
3 Star
0%
2 Star
0%
1 Star
0%

Average Attribution Rating

Durability
4.7
Value
4.6
Features
4.7
Design
4.6
Usability
4.7
Michael

Waxhaw, NC

Overall
Durability
Value
Features
Design
Usability
I couldn't believe it.

July 13, 2007

Me and my friends were kidding around on this web site to see what cheap things we could do to make my friends subs hit harder. We find this product and start laughing but we decided it was cheap so it was worth a try. He has oversize subs in these small boxes and we start putting it in and when we turn on the system, THEY HIT HARDER THAN EVER! Worth every penny.

2 of 2 found this helpful

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tonness

new harmony, in

Overall
Durability
Value
Features
Design
Usability
poly fill

September 14, 2014

It helps a bunch making the sub think its in a bigger sub box and helps the sound....

0 of 0 found this helpful

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Carlos

Arlington, TX

Overall
Durability
Value
Features
Design
Usability
Perfect for Small Enclosures

April 17, 2014

This small addition will add a way better depth to your bass. Awesome!

0 of 0 found this helpful

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Gage

Robbinsdale, MN

Overall
Durability
Value
Features
Design
Usability
why not get some?

September 27, 2011

I got this for my sealed box I made. Helps trick the sub into "thinking" the box is larger than it is. Works as expected.

0 of 0 found this helpful

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Brandon

Parma hts., OH

Overall
Durability
Value
Features
Design
Usability
Great Value

March 9, 2010

This product was very easy to use and it got the job done right. I used it for my 10" subwoofer in a sealed box and it made it hit louder and deeper.

0 of 0 found this helpful

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Richard of NYC

Jackson Heights, NY

Overall
Durability
Value
Features
Design
Usability
not magic but helps

February 16, 2010

I run 200W to a jl 10w0v2 sub rated at 150W in .7 cu. ft box- as recommended by manuf. I get good hard bass. But after testing a few tracks I came upon some punchy bass on R&B and reggae. I experimented with polyfill and wound up using 1/2 lb, fluffed it up and the bass is much better, richer if u will, and no punchiness. This "smoothed" it out, for lack of a better term. I did not hear any increase in sound just better bass, nothing magical. I compared the 60-100hz sweep and noted no difference. But it helps. I do hear that polyfill works wonders for mid bass drivers but for subs all I can attest to is smoother bass tones on hard notes.

0 of 0 found this helpful

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Nicholas

Henderson, NV

Overall
Durability
Value
Features
Design
Usability
This stuff is phenominal!

February 12, 2010

Stuffed my 10" one cubic foot box with about 2/3 of the package (16 ounces) and am absolutely amazed!! Would highly recommend as a quick, cheap, and easy way to increase the size of you box as well as the clarity of bass.

0 of 0 found this helpful

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robert

Council Bluffs, IA

Overall
Durability
Value
Features
Design
Usability
yea, it's foam

August 4, 2009

as promised white fluffy stuff. exact same poly-fill found at the hobby store.

0 of 0 found this helpful

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alex

Reno Nevada

Overall
Durability
Value
Features
Design
Usability
poly-great

July 1, 2009

i have a 1.7 sealed enclosure and put my cvr in here and i thought it wasnt going to give it bass but i couldnt believe it. great buy!. just be careful on over filling your box they recomend only half of the box is filled with it. and cheap for more bass.!

0 of 0 found this helpful

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Aj

Haltom City Texas

Overall
Durability
Value
Features
Design
Usability
polyfill fiber

June 14, 2009

truthfully i didnt compare the sound of the bass with or without the polyfill, i just read up on what its supposed to do and it supposed to make the box think its bigger than it really is so im just guessing it works and also for $3.99 it was worth it i only used abouthalf the bag in about a 1 cubic volume box in my single cab dakota so u can do a very large box with this bag it goes a long way and if it does what people say tis well worth it expecially when you have limeted space like i did.

0 of 0 found this helpful

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Matty

Rosedale MD

Overall
Durability
Value
Features
Design
Usability
Poly-Fil

June 4, 2009

This product is a good price and does the trick. Dont let the pic fool you because a LOT comes in one pack.

0 of 0 found this helpful

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Paul

Cadillac, MI

Overall
Durability
Value
Features
Design
Usability
works great!

April 23, 2009

It's awesome and helps give a more "full" sound to a smaller sealed box, so if your short on cash and want more sound this is definitely a way to go. But, as someone stated earlier make sure to be careful when placing it in the box and not to "over stuff" so that your subs won't over heat and end up costing you more money.

0 of 0 found this helpful

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JEFF

ITHACA, MI

Overall
Durability
Value
Features
Design
Usability
Works great

February 24, 2009

I bought some, I tried it, it works great; I would recommend this to anyone that wants to use a smaller enclosure than is recommended by the manufacturer for the sub or just improve quality of the sound to reduce the distortion a little bit by adding a little bit, but be careful if you surround the sub to closely it may overheat and burn up, but it really does work I use it all the time

0 of 0 found this helpful

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keenan

lindenhurst, IL

Overall
Durability
Value
Features
Design
Usability
SICK...

October 7, 2008

cheapest upgrade u can do to get better sound from your sub, if your box is small and your short on space...

0 of 0 found this helpful

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alan

roseville, MN

Overall
Durability
Value
Features
Design
Usability
lol good for cheap boom

August 11, 2008

I got this for my alpine type r because I had it a sealed and I wanted more boom, for $4 this amazing, the amount you get is bigger than a pillow and it goes a long way, buy it!!!!!

0 of 0 found this helpful

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Lorren

Millerstown, PA

Overall
Durability
Value
Features
Design
Usability
Excellent Product

July 10, 2008

I bought a bag of this stuff and put in 10 inch enclosure. It made a big improvement, It hit harder than before.

0 of 0 found this helpful

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John

Cocoa, FL

Overall
Durability
Value
Features
Design
Usability
Good Stuff

July 10, 2008

i have this in a single 10" enclosure and it hits harder than i thought...this stuff is great

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Bojan

Canada

Overall
Durability
Value
Features
Design
Usability

July 10, 2008

It is helpful for small enclosures but it is not for ported ones. It gives a bit more power and a cleaner bass even in a ported box. It is not a surprising but its worthed if you want cheaper, better sound.

0 of 0 found this helpful

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Kevin

Colorado City, CO

Overall
Durability
Value
Features
Design
Usability
More Poly Power

April 10, 2008

Don't like the sound of a sub in a sealed box? Don't have a lot of room for a box? This product gives small boxs with any sub a great sound. Makes a big difference.

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Jorge

Reno, NV

Overall
Durability
Value
Features
Design
Usability
.WOW...

November 8, 2007

THIS PRODUCT IS THE CHEAPEST WAY TO ADD POWER TO YOUR SOUND SYSTEM ITS WORKS GREAT IF YOU WANNA ADD SOME EXTRA POWER TO YOUR SUBS POLY FIL IS THE WAY TO GO...

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Product Summary

Manufacturer

Model Number

PF20

UPC

026541188205

Weight

1.75lbs

Internal SKU

pf20

Internal Product ID

5344

Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: Poly-Fil PF20