polyfil in doors or panels?

[KickinAudio 5]

I plan on doing some dynamat here soon, would it be worth also filling my panels and/or doors with polyfil? What effects will it have?

[CBFryman 2]

Overkill mang.

[///M5 2,833]

You don't really need to make an IB installation feel bigger, but putting some acoustic sort of insulation to minimize reflections will be helpful. Mostly the area behind the speaker cone is what I'd worry about. Of course being captain overboard behind mine is 4 layers of Ensolite and a layer of acoustic foam. Open celled is better, but it will rot when it gets wet while a closed cell foam does less to dampen reflections it can't really mold as most are waterproof.

[CBFryman 2]

Two Words.

Over

Kill

secondskinaudio.com

[KickinAudio 5]

I don't feel that my question was answered.

I want to know the effects of adding polyfil in my panels and door's.

Say I don't even use dynamat, and I stuff all of my panels, what effects will it have? Will i notice it? As much as adding dynamat? I don't care about rattles, I'm trying to make the interior more quiet and sound.

[///M5 2,833]

It will alter the path of some of the reflected waves a bit, which may clean up the response a little perhaps, but a foam will work better for doing that. Polyfill is not all that great as an acoustic damper so it won't really ake your rig that much quieter. The other generic use of polyfill is to make a space "feel" larger to a speaker but making something that is assumed infinetely large, larger isn't possible.

[KickinAudio 5]

Ok, so maybe some dynamat and foam? And stick with open cell foam?

I'm not concerned at all about it getting wet, so would closed cell be any better?

such as this?

What about this stuff, it's cheaper, and thicker

[///M5 2,833]

The structure is more important than the thickness since you can layer. IMO either would be better than polyfill. What are the products pictured above?

[Eldorado 0]

2nd one is carpet padding

[CBFryman 2]

All i can tell you is there was a noticeable difference between just dampening and dampening + overkill (semiclosed neoprene foam).

a little more midbass and a little more clear.

[pimpedout97x 4]

n00b

[KickinAudio 5]

The ones pictured was some open cell foam, and yea the carpet padding.

I was looking at secondskin, and they have a selection on foam. I think I might just go with that.

[CBFryman 2]

Cant go wrong. Best stuff I've personally seen/used. But all i have to compare it to is dynamat.

[ramos 2]

It will alter the path of some of the reflected waves a bit, which may clean up the response a little perhaps, but a foam will work better for doing that.  Polyfill is not all that great as an acoustic damper so it won't really ake your rig that much quieter.  The other generic use of polyfill is to make a space "feel" larger to a speaker but making something that is assumed infinetely large, larger isn't possible.

<{POST_SNAPBACK}>

But adding too much can reverse the effects, and make the enclosure seem smaller.

[CBFryman 2]

Good to know.

What is the optimal ratio? 1lb per cuft is what ive always heard. Less if you dont need it to "seem" as big and any more and you are just taking up space.

[ramos 2]

I don't feel that my question was answered.

I want to know the effects of adding polyfil in my panels and door's.

Say I don't even use dynamat, and I stuff all of my panels, what effects will it have? Will i notice it? As much as adding dynamat? I don't care about rattles, I'm trying to make the interior more quiet and sound.

<{POST_SNAPBACK}>

If your quieting road noise don't bother with polyfill. It won't help at all for killing road noise. Need something with mass to accomplish that. On the floors carpet jute works wonders for quieting road noise

[///M5 2,833]

Good to know.

What is the optimal ratio? 1lb per cuft is what ive always heard. Less if you dont need it to "seem" as big and any more and you are just taking up space.

That is a bit too much IMO.

[Eldorado 0]

I don't feel that my question was answered.

I want to know the effects of adding polyfil in my panels and door's.

Say I don't even use dynamat, and I stuff all of my panels, what effects will it have? Will i notice it? As much as adding dynamat? I don't care about rattles, I'm trying to make the interior more quiet and sound.

<{POST_SNAPBACK}>

If your quieting road noise don't bother with polyfill. It won't help at all for killing road noise. Need something with mass to accomplish that. On the floors carpet jute works wonders for quieting road noise

<{POST_SNAPBACK}>

Wheel wells too.