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Old 09-05-2014, 04:29 AM   #1
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Arrow wth is this "polyfill" - audio mod ??

hey,

just like I said ... wth is polyfill, that you can "buy from Walmart in 1kilo bags"
I can`t find for the world a reliable translation and I don`t want to stuff my audio boxes with god knows what

soo ... Polyfil used for the audio mod - is it some kind of --> polyester cotton <-- like material ?

thanks a lot

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Old 09-05-2014, 04:55 AM   #2
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Ah yes, Polyfil.

Polyfil is a synthetic filling. You've come across it at some point. Pillows? Polyfil.

Almost every speaker enclosure has polyfil, except jeeps. If you have a 2012+ jk with the premium system (maybe just the plain one too) the sound is boomy and hollow has zero definition. Unscrew the grille of the sub (if applicable) and stuff it with Polyfil (buy it at walmart for like $5) Fill it almost all the way up. But leaving a space for the magnet. Do the same thing for your soundbar. You really have to stuff this one because it is completely hollow and if your feeling froggy tackle the front speakers ( i opted out of this one too labor intensive for very little reward)

But now the techy side. What Polyfil does is absorb midrange frequencies from the rear wave of the mid-bass unit that would otherwise leak out of a vent or blow back thru the cone. This leakage or bleeding can cause smeared vocals.

In sealed enclosures, polyfill can trick the driver into thinking it's in a bigger volume of space.

The sub is the biggest improvement trust me. Just trust me. Plug in ya fav tunes and ::

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Old 09-05-2014, 07:20 AM   #3
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Thank you
Sounds great' problem is i am not from US... And i still have no clue what Polyfil is or where the heck i find it.
That is why i was asking if it is - polyester cotton or ?
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Old 09-05-2014, 07:35 AM   #4
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Polyfill is easily found in bed pillows. Go to your local department store and buy a cheap pillow that says polyester fill on the label [not feathers]. Just cut it open and you have it.
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Old 09-05-2014, 07:38 AM   #5
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Poly fill is also the insulating material they use inside sleeping bags and down alternative pillows/comforters. It is also commonly used as the 'fluff' inside stuffed animals.
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Old 09-05-2014, 07:47 AM   #6
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Great, i'll go buy a bunch of pillows
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Old 09-05-2014, 07:51 AM   #7
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Quote:
Originally Posted by trym3 View Post
Great, i'll go buy a bunch of pillows
I did my whole Jeep with less than 1 pillow. The trick is to NOT over stuff the enclosure with Polyfil. Fill the area without compressing the Polyfil will give the best results.

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Old 09-05-2014, 08:09 AM   #8
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Quote:
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Great, i'll go buy a bunch of pillows
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I did my whole Jeep with less than 1 pillow. The trick is to NOT over stuff the enclosure with Polyfil. Fill the area without compressing the Polyfil will give the best results.

x2, you won't need a bunch. 1 should more than do it.
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Old 09-05-2014, 10:24 AM   #9
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I bought a $2 pillow at Walmart, and only needed about half to fill my soundbar.

Before you fill the soundbar, set the balance (or is it fade?) to 100% soundbar and turn the base all the way up. It will sound like garbage. Then do the same test after stuffing the soundbar. Night --> Day.
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Old 09-05-2014, 10:45 AM   #10
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Thank you
Sounds great' problem is i am not from US... And i still have no clue what Polyfil is or where the heck i find it.
That is why i was asking if it is - polyester cotton or ?
It's in the craft section of the store. Comes in sheets or loose fluff by the bag. It's used for quilts and stuff, so that's where to look.

A bag of the stuff is like $3, you don't need to go shredding pillows.
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Old 09-05-2014, 10:46 AM   #11
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You can get it on Amazon.com: Amazon.com: Fairfield Poly-Fil Premium Polyester Fiber, White, 1 Bag, 12-Ounce

Easy to find in probably any country at a local supplier. Any store that sells sewing supplies should have a similar polyester fill product in stock.
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Old 09-05-2014, 10:49 AM   #12
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I bought a bag at a craft store. Probably 18 inches x 12 inches round, give or take. I didn't use a tenth of it to fill my sound bar, woofer and tweeters. Didn't do the front speakers.

Sounds a bit better. Well worth the 5 bucks I paid.
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Old 09-05-2014, 11:08 AM   #13
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This is Polyfill.

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Old 09-05-2014, 11:43 AM   #14
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Just did the fill while replacing the sound bar speakers with some Kickers sitting here in the Wal-Mart parking lot waiting for wife to get off for lunch. And he!! Yeah! Actually not embarrassed to turn it up now. Now to figure out how to get to the front speakers haha

Oh yeah the bass can go past +3 now
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Old 09-05-2014, 11:47 AM   #15
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more noticeable on the subwoofer. I did the soundbar as well and not much difference.
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Old 09-05-2014, 12:07 PM   #16
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Whaaat.....a modification in my tightwad price range? Heck I'll do it just for entertainment, I think I have some in my craft dresser. Thanks, all!
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Old 09-05-2014, 12:12 PM   #17
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might I add... when I installed my hothead headliners, it too made a difference in the way the system sounds. You can finally feel the bass.
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Old 09-05-2014, 12:35 PM   #18
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I just added some fill to my sound bar. It took about 5 minutes and my wife had a bag of the stuff already at the house so it cost me $0. However I can't really tell a difference. Maybe it will be noticeable if I go back to back from my jeep to a friends. It didn't hurt anything and it is always fun to do more modifications
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Old 09-05-2014, 12:41 PM   #19
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If this stuff is used in every vehicle speaker, then why isn't it in Jeeps?
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Old 09-05-2014, 01:01 PM   #20
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Quote:
Originally Posted by Mammoth919 View Post
Ah yes, Polyfil.

Polyfil is a synthetic filling. You've come across it at some point. Pillows? Polyfil.

Almost every speaker enclosure has polyfil, except jeeps. If you have a 2012+ jk with the premium system (maybe just the plain one too) the sound is boomy and hollow has zero definition. Unscrew the grille of the sub (if applicable) and stuff it with Polyfil (buy it at walmart for like $5) Fill it almost all the way up. But leaving a space for the magnet. Do the same thing for your soundbar. You really have to stuff this one because it is completely hollow and if your feeling froggy tackle the front speakers ( i opted out of this one too labor intensive for very little reward)

But now the techy side. What Polyfil does is absorb midrange frequencies from the rear wave of the mid-bass unit that would otherwise leak out of a vent or blow back thru the cone. This leakage or bleeding can cause smeared vocals.

In sealed enclosures, polyfill can trick the driver into thinking it's in a bigger volume of space.

The sub is the biggest improvement trust me. Just trust me. Plug in ya fav tunes and ::
Holy crap, that is an excellent post
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Old 09-05-2014, 04:32 PM   #21
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This was one of my first mods and I'm a satisfied customer, but still...

Ya gotta wonder if a buck worth of polyfill can yield marked improvement, why doesn't Jeep just do this at the factory? Surely there's someone from Jeep perusing these forums on occasion so this mod can't be a complete unknown to them, can it?
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Old 09-08-2014, 02:37 AM   #22
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ty

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This is Polyfill.

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Old 09-09-2014, 09:40 PM   #23
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Did our sound bar at it was a nice improvement. Next to do sub!
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Old 09-09-2014, 09:48 PM   #24
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It is a waste of time and effort. Makes zero difference. Go with dynamat or gtmat instead.

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