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Old 11-08-2012, 09:24 PM   #421
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All you do if take the speakers out of your sound bar then stuff it with polyfill [or i just cut a pillow open and used that] then screw your speakers back in. It fills in all of the hollow plastic to give it a more full or richer sound.

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Old 11-08-2012, 09:36 PM   #422
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Stuffed the soundbar and the sub in my lj about a week ago and the difference is amazing. Funny thing is, I worked in a stereo shop for 7 years and used this trick in high end systems all the time but it didn't occur to me to try it on my factory system until I saw it in the cheap, easy mod thread.

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Old 11-09-2012, 09:26 AM   #423
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I did mine a few months ago, thought the sound was worse, and finally removes the polyfill a few weeks ago and the sound is much better. A waste of time and energy to do this mod.
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Old 11-09-2012, 10:03 AM   #424
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Originally Posted by Mntdriver View Post
I did mine a few months ago, thought the sound was worse, and finally removes the polyfill a few weeks ago and the sound is much better. A waste of time and energy to do this mod.
I agree. I did this as well as the Kicker speaker upgrade and thought it was a waste of time and money. Without modifying the stock amp setup it's a waste of time and money.
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Old 11-09-2012, 10:25 AM   #425
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Did you both stuff the poly-fill directly behind the speakers or just in the surrounding area?
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Old 11-09-2012, 12:44 PM   #426
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I think replacing "your head" is a little extreme. Maybe you only needed new ears...
Bahahahahahahah!

It took a second but I got it!! (No UFO's flying over my head, at least not today anyway.

Headed to Walmut for Poly fill, I'm very curious as my sound bar speakers sound pretty much like shiite.This is where I start.........who knows when and where this mod will finish. YIKES!
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Old 11-09-2012, 01:36 PM   #427
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Has anyone tried stuffing the soundbar on one side only then doing a sound test by sitting in the middle with the balance set to full rear and R -L in the middle, then deciding if the stuffed side sounds better or not?
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Old 11-09-2012, 02:44 PM   #428
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Did you both stuff the poly-fill directly behind the speakers or just in the surrounding area?
Up into the sound bar and til it filled the speaker pod leaving enough room for speaker to be put back in. It's the amp not putting enough power to the speakers. I read a thread about a guy ising component speakers Polk 6500's he thought it sounded better going this route.

At this point I'm saving to do the amp sub mod as that factory alpine sub is a joke. Love the HU so I'm saving it.
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Old 11-11-2012, 07:40 PM   #429
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Originally Posted by Celtic
Has anyone tried stuffing the soundbar on one side only then doing a sound test by sitting in the middle with the balance set to full rear and R -L in the middle, then deciding if the stuffed side sounds better or not?
I did this and the stuffed side definitely sounded better. I also replaced the stock speakers with Polks.
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Old 11-11-2012, 08:09 PM   #430
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I did this and the stuffed side definitely sounded better. I also replaced the stock speakers with Polks.


Thanks lilnik10. Your reply is much appreciated.��
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Old 11-19-2012, 04:59 AM   #431
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I stuffed my sound bar yesterday, and I immediately noticed the difference. It wasn't like getting a whole new system, but it's a lot closer to what I was expecting. The music sounds noticeably richer. I forgot all about stuffing my sub until I took off all my a/c vents and speaker grilles for painting. I guess that's on today's to do list.
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Old 11-20-2012, 11:31 AM   #432
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Stuffed the soundbar, sound quality improved. Here's the funny part....I had a remote starter installed a few days later and when I got in, fired up the stereo I couldn't believe the difference. WAY better. tried he iPod, Sirius, CD, all vastly improved. Went back to the installer who does complete sound systems as well and asked if the install could do this. He said probably not but, what the heck....usually he gets people coming back complaining their sound is worse as they don't understand that he disconnects the battery when installing starters which resets all personal sound settings. Hmmmm? Strange brew.
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Old 11-23-2012, 09:43 AM   #433
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I stuffed my sound bar and sub....and it did what I expected it to do....which was simply a slight change in the tone of the bass response. I just want to lower the frequency response where the mid bass resonates....especially in the 6.5"'s.

I'm looking forward to getting new 6.5"'s, as that will help with the muddiness. Getting some type of headliner will also help. There is way to much plastic/fiberglass/metal in the Jeep. I need to soften up the top so that the new tweeters don't sound too harsh.
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Old 11-23-2012, 01:33 PM   #434
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Removed my polyfill and sound quality increased. What a waste of time and energy to install this stuff!!
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Old 11-23-2012, 03:02 PM   #435
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I still don't think people understand what polyfill does or how it works.

Using Polyfill in a Custom Subwoofer Box | Klaus Audio

Polyfill is used in many subwoofer enclosures, yet not many people know why they are using it. They may see it done somewhere and think it would be a good idea to use in their own box. There are times when polyfill is needed and times where it is not, and knowing when to use it will allow you to get the best sound from your subwoofer box.

In general, a subwoofer box that would require polyfill would be a subwoofer box that is close to, or smaller than the manufacturer's minimum recommendations for internal volume. Polyfill will make a subwoofer perform as if it were in a larger enclosure by slowing sound waves as they pass through the polyfill. The physical internal volume of the subwoofer box remains the same, yet the effective internal volume changes when polyfill is added.

Sealed subwoofer boxes are the best candidates for polyfill. It is possible to use polyfill in a ported enclosure, but this is not recommended, as it would then change the tuning of the box. Sealed subwoofer boxes generally yield a better, flatter frequency response curve when the enclosure is larger (to a certain point). If you need a subwoofer box of a given size, and your available trunk dimensions do not allow you to customize a subwoofer box with enough internal volume, it is possible to get the subwoofer enclosure built a little smaller than desired and have polyfill added. This will make the subwoofer box "appear" larger to the subwoofer.

If your sealed subwoofer box has sufficient internal volume for your subwoofer, or towards the maximum recommended internal volume for your subwoofer, you do not need to add polyfill to your subwoofer enclosure. If you have too small of a sealed subwoofer box for your subwoofer, adding polyfill is a great way to make your box perform as if it were a larger enclosure. If you have your doubts, it is always possible to compare the performance of your subwoofer box with and without polyfill. You only need to do this by ear, as it is satisfaction from what you hear out of your system that really matters.

If you decide to use polyfill in your custom subwoofer box, you have a couple of options. One option would be to buy car audio specific polyfill from an audio shop, which can be very expensive. A cheaper alternative that yields almost the exact same results is to buy polyfill from the craft section of your local Walmart. There is virtually no distinguishable difference between the effects of the two types of polyfill, and the craft polyfill is very inexpensive when compared to the car audio polyfill.


Here is another link:
Blog

One of the problems with Wranglers is that the speakers are in small, plastic, non-damped boxes that give you a hollow, plastic sound. Throw in the lack of tweeters, and a fiberglass hardtop, and your system will sound like mid-range mud.

Polyfill (and dynomat) are used to help offset that problem.

There is a reason why you don't seem high quality home speakers and subs in small, cheap, non-damped plastic boxes.
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Old 11-24-2012, 08:23 AM   #436
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Originally Posted by Mntdriver View Post
Removed my polyfill and sound quality increased. What a waste of time and energy to install this stuff!!
Did you learn anything? Sounds like it so, take that away and onward and forward!
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Old 11-25-2012, 01:05 AM   #437
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All those MultiMillion Dollar Audio Professional engineered Audio/Video Companys must waste alot of tiime...LOL...open a Cabinet or enclosure of any Hi-End speaker and you'll see how their Wasted Time made them Rich, name a Name for them, and best of all, made Music Sound Better for us...

Did anyone ask How much stuffing got Stuffed? Did Sound difference get compared Top on before and after, and Soft Top, stuffed/not stuffed.......How about Top down or Even better, Top Off, doors off, stuffed/not stuffed? LOL

Fellow Jeepers, isn't it Great to own a Machine with 4 wheels that can physically change it's mood when your mood changes?????? LOL....
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Old 11-26-2012, 09:14 AM   #438
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All those MultiMillion Dollar Audio Professional engineered Audio/Video Companys must waste alot of tiime...LOL...open a Cabinet or enclosure of any Hi-End speaker and you'll see how their Wasted Time made them Rich, name a Name for them, and best of all, made Music Sound Better for us...

Did anyone ask How much stuffing got Stuffed? Did Sound difference get compared Top on before and after, and Soft Top, stuffed/not stuffed.......How about Top down or Even better, Top Off, doors off, stuffed/not stuffed? LOL

Fellow Jeepers, isn't it Great to own a Machine with 4 wheels that can physically change it's mood when your mood changes?????? LOL....
Don't forget its not just polyfil you are supposed to dynamat the enclosure first.
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Old 12-05-2012, 12:19 AM   #439
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it sure seems the 2 door owners are more happy with it than the jku people. I could agree, I used quite a bit of poly in the bar and sub, and didnt notice a thing. I even have the kickers up there too installed a year ago.
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Old 12-05-2012, 12:31 AM   #440
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I'm a 2 door and I aprove this message !
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Old 12-05-2012, 10:03 PM   #441
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it sure seems the 2 door owners are more happy with it than the jku people. I could agree, I used quite a bit of poly in the bar and sub, and didnt notice a thing. I even have the kickers up there too installed a year ago.
I removed my polyfill from my 2-door and went back to OEM, and the sound is MUCH BETTER. What a waste of time and energy doing this mod.
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Old 12-06-2012, 02:55 PM   #442
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Did this in my JKU and difference in tone was immediately improved. The sound is rich and deep compared to far and thin. (not very technical, I know). Got a large bag of polyfil from the pillow-fixins dept at a fabric store and didn't use as much as I thought. I think it was a 32 oz bag and used less than half. Worth a try. Only took about 10 minutes and was fun. I'm sure MtnDriver will pop back in, again, to say its a waste of money... He really has an issue with this.
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Old 12-07-2012, 04:02 PM   #443
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Stuffed the soundbar (Not too much) and put the speakers back. Sound has improved slightly and annoying rattle has stopped.

My centre light is now permanently on (or was) until i disconnected it... Anyone had this problem???
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Old 12-07-2012, 05:34 PM   #444
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Originally Posted by MarkII
Did this in my JKU and difference in tone was immediately improved. The sound is rich and deep compared to far and thin. (not very technical, I know). Got a large bag of polyfil from the pillow-fixins dept at a fabric store and didn't use as much as I thought. I think it was a 32 oz bag and used less than half. Worth a try. Only took about 10 minutes and was fun. I'm sure MtnDriver will pop back in, again, to say its a waste of money... He really has an issue with this.
Lots of us agree that the "improved and amazing" sound "improvements" by doing this mod makes the sound muddy but we agree that the results are subjective. Very few have done the mod and then removed it for sound comparisons.

Not much difference than the stubby antenna mod. People swear by the stubby because it looks good....they don't take in account that the reception sucks.
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Old 12-07-2012, 05:44 PM   #445
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It is all subjective, but if someone is expecting "amazing", they will be disappointed. However, if you know what to listen for (and done correctly), a small improvement can be heard for just a few bucks.

This isn't some internet rumor...there is a specific (and simple) science behind how polyfill works.

To hard part is finding the right amount of polyfill to use becasue too much polyfill is worse than too little or no polyfill.
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Old 12-07-2012, 08:04 PM   #446
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Originally Posted by Mntdriver

Very few have done the mod and then removed it for sound comparisons.

Not much difference than the stubby antenna mod. People swear by the stubby because it looks good....they don't take in account that the reception sucks.
Very few? The comparison is done as soon as it's filled. It's compared to stock.

And I have read about reception issues.
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Old 12-07-2012, 10:16 PM   #447
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Very few? The comparison is done as soon as it's filled. It's compared to stock.

And I have read about reception issues.
Check post #429 from lilnik10.
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Old 05-12-2013, 12:50 PM   #448
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2012 JKU... Vast improvement. Filled towards dome light on both sides, all around the speakers, and directly behind both enclosures.
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Old 05-12-2013, 01:05 PM   #449
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Has anyone done this on the 2013 upgraded Alpine speakers? If so, any improvement?
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Old 05-12-2013, 04:56 PM   #450
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I used to install car audio for Circuit City for two years before they closed up shop and have used poly-fill in a lot of applications. That being said, I just installed a pair of Infinity Kappa 62.9i's in the sound bad last week, and noticed that there was a weird sound coming from them. Upon listening and doing some tweaking, I realized that it was two things. The first was the sound of the cheap plastic enclosure in which they sit, and secondly the sound of the big ass speaker connections of the Kappas rattling off said cheap plastic. Bought a bag of this and just stuffed a full bag into the sound bar and both annoying noises are gone. There is a dual effect here, it makes the sound waves slower than normal, making the speaker sound like it is in a bigger enclosure and it also dampens the cheap plastic and anything (big black connection box of the Kappas) that is in it. The sound is a lot cleaner and will be more noticeable when there is greater power present. For $6, I couldn't be happier with the results and will definitely do this with the front speakers when the time comes. This is in a 2 door wrangler with basic stock head unit.

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