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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

You Save: $4.00 (40.04%)

$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

Promotions
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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
85%
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
4.7
Usability
4.7
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.

8 of 10 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!

6 of 7 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

4 of 5 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.

7 of 12 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...

3 of 4 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.

1 of 1 found this helpful

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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.

3 of 5 found this helpful

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Eric

Rhinebeck, NY

Overall
Durability
Value
Features
Design
Usability
Great to use

November 16, 2014

Bought this for a small sealed box I had and glued it to the walls. It's really easy to work with and you get a lot.

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.

5 of 10 found this helpful

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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...

0 of 0 found this helpful

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Matt

Red Oak, TX

Overall
Durability
Value
Features
Design
Usability
Just follow the instructions and you are good.

October 12, 2007

Very nice product for getting more bass out of some smaller boxes. I used this in a 1.4cuft enclosure for a kicker sub, and affixed it with super 77 and it stays fine and does help the bass out a little by giving it more time for the air to reach the box. This would also be very useful for making your own home theater speakers and filling the small spaces you have to work with. Just dont overstuff it, and follow the instructions you get.

0 of 0 found this helpful

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Juan

Fresno, CA

Overall
Durability
Value
Features
Design
Usability
polly-fill

August 8, 2007

ok, this is worth every penny, i bought a bag of this stuff at wal-mart for 4 bucks, expecting nothing out of it, but it definetly makes a different in the small box i have in my single cab s10! it added a much deeper and cleaner bass than before. Worth every penny! It is one of the cheapest ways to improve your bass!

0 of 0 found this helpful

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Jonathan

Nacogdoches, TX

Overall
Durability
Value
Features
Design
Usability
Awesome Stuff

July 28, 2006

Added 1 bag to each one of my sub boxes for my Audiobahn 12's and 15 SE. This stuff really works makes bass sound clearer and tighted. Greatly improves sound quality. Need ato buy if you own any subs.

0 of 0 found this helpful

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Keith

Atlanta, GA

Overall
Durability
Value
Features
Design
Usability
Good Investment

March 16, 2006

I had some of this from my previous sub enclosure. At first I installed my new subs without this, but once I put this in the box I got tighter, louder bass. It is definitely worth buying.

0 of 0 found this helpful

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Chris

Sacramento, CA

Overall
Durability
Value
Features
Design
Usability
Better sounds for under $5 in my box.

January 22, 2006

I have a single DUB 12' sub in my truck and it sounds great. Upon putting a 20 oz bag of Poly Fil in it it instantly made an incredible difference. It sounds stiffer almost like the bass dosn't sounds nearly as distorted. Great difference in sound with a great price. The more fill the better. Start with the little things when trying to improve your system the in-expensive way.

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.!

2 of 5 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 1 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 1 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 2 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.

4 of 10 found this helpful

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Browse 1 question and 9 answers
Hide answersShow all answers | Sort by
are these sheets? or is it just a big chunk of it?
Lance R on Feb 20, 2015
Best Answer: Its a pillow sized bundle of it. It unfolds into a sheet. Rather more like peels out to a sheet. One bag did my dual 12" vented box with a 1" layer on all sides... I glued it with spray contact and holds well. I have an audison av uno driving 1700 watts at 1ohm into two Alpine 12" type r. Doesn't even blow fibers out and they hit very hard.
Reply (1) · Report · Tom N on Feb 20, 2015
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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