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Hi I took the advise of some here and stuffed poly fill in my rear speaker enclosures and my woofer enclosure in my 2012 with the optional 430N Infinity system. My sound was never improved and after 4 months of this trial run, I removed all the poly fill and it turns put that the OEM sound is MUCH clearer and not muddied like it was with the poly fill. Much clearer highs and a tighter thump WITHOUT the poly fill.
 

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HHHHmmmm, the debate has gone back and forth on this one. Some say better without it, many say better with it. Guess there is a little bit of subjectivity to this.
 

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Wondered if anyone has done the mod and gone back like I did. The audio difference is amazing and I'm glad I removed it.
 

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I always have trouble believing engineers not making improvements that cost almost nothing.

S
 

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I wonder if those who do not like the poly fill are stuffing too much in the speakers?
 

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Polyfill should have no impact on your highs what-so-ever. And given how speaker enclosures work, polyfill should make you bass tighter and less boomy. If things sound muddled, I do wonder if they were over-stuffed.....or if you were simply noticing more mid-bass from the "stuffed" enclosures.
 

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in the OP's defence, my fronts sound great with no polyfill.. but i wasn't ripping the dash open for a $2 mod ;)

my 4ohm 6.5 BA's in the sound bar are only good for the highs .. which was lacking with the infinities.

IMO, my sub did improve with the fill.. was WAY TO BOOMY (and hollow) without it.

i stand firm that my sound has improved with polyfill.. albeit, marginally. an improvement nevertheless :)

to each their own (hotheads head lines -full kit- had also helped, marginally)

for a OlllllllO... sounds decent. great? no. but decent
 

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BTW you don't have to rip the dash apart to access the front speakers. :)
 

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HHHHmmmm, the debate has gone back and forth on this one. Some say better without it, many say better with it. Guess there is a little bit of subjectivity to this.
True. I think when it comes to sound, it's very subjective.
Poly or not to poly.
I did my sound bar and I got a slight improvement. An upgrade in speakers and sub may be coming at some point.
 

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I thought the wf police were going to come arrest me because I didn't hear the "amazing, unbelievable" difference poly fill makes...
 

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panthermark said:
polyfill should have no impact on your highs what-so-ever. And given how speaker enclosures work, polyfill should make you bass tighter and less boomy. If things sound muddled, i do wonder if they were over-stuffed.....or if you were simply noticing more mid-bass from the "stuffed" enclosures.
x2
 

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The Poly fill never did anything for mine either. Been considering taking it out myself
 

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I never felt the poly did anything. I left it because it really made no difference.
I just took it out while I was trying to figure out why my rears speakers died.
It turns out the stereo took a dump. The poly is out, and won't be going back in.

Just didn't work for me.
 

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worked on mine

double bass drums on Painkiller did not distort at full volume
neither did Hot for Teacher.

never tried NWA, Too Short or any of that, nor will I
 

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Fishead said:
I never felt the poly did anything. I left it because it really made no difference.
I just took it out while I was trying to figure out why my rears speakers died.
It turns out the stereo took a dump. The poly is out, and won't be going back in.

Just didn't work for me.
Wait, so you're comparing with a different head unit?
 

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Besides the voice coils getting burned out from the extra heat, there might not be much of a difference when adding polyfill.

I'm kidding, of course: my factory sub goes down to 20 hz with authority now. Erich Kunzel's "Thriller" never sounded so rich. I also appreciate the advanced soundstage in Stravinsky's "Firebird." So sweet.

S

S
 
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