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DFW40
03-07-2005, 04:30 PM
What do you guys do to deaden your doors. Do you not only use a dynamat but also a foam type of material to help absorb the rear wave. Also do you use anything to seal the door panel crack where it meets the door?



http://www.partsexpress.com/pe/showdetl.cfm?&DID=7&Partnumber=260-520
http://www.partsexpress.com/pe/showdetl.cfm?&DID=7&Partnumber=268-242

squeak9798
03-07-2005, 04:36 PM
Both of those are good. Ensolite is another common open-cell foam: http://www.raamaudio.com/products.htm#

As for sealing the door panel...not really needed; just as long as you seal the metal door to separate the back wave from the front.

DFW40
03-07-2005, 04:47 PM
Well the reason why I was asking is because using something like Dynamat keeps metal from vibrating but does not absord the sound wave especially if it has the foil on it which is made to bounce sound off but hold the metal beneath still. So you really need a layer of dynamat and then a layer of very soft rubber or foam rubber on top of that to take car of the rear wave.

squeak9798
03-07-2005, 04:49 PM
Well, you will still likely need multiple layers of Dynamat type-sound deadening (mass loading), and then a layer of open cell foam (barrier loading)

ismelllikepoop
03-07-2005, 05:35 PM
how do you mount that deflex pad? like how far back do you put it?

squeak9798
03-07-2005, 07:46 PM
Just on the first surface behind the speaker.

aphinney
03-07-2005, 08:32 PM
cement it....haha

azbass
03-07-2005, 08:37 PM
^ X2

Naxis2k1
03-08-2005, 04:58 PM
you can get some sound foam of ebay for pretty cheap lots of it too. and just use some 3m spray to attach...

iceteebone
03-08-2005, 09:22 PM
What do you guys do to deaden your doors. Do you not only use a dynamat but also a foam type of material to help absorb the rear wave. Also do you use anything to seal the door panel crack where it meets the door?



http://www.partsexpress.com/pe/showdetl.cfm?&DID=7&Partnumber=260-520
http://www.partsexpress.com/pe/showdetl.cfm?&DID=7&Partnumber=268-242


what makes that foam there better then something i can pick up at walmart? i noticed when i have my mids in my doors playing my door rattles pretty bad on the outside. would that foam stuff placed behind the speaker help to stop that?

paikiah
03-08-2005, 09:35 PM
I've done all that you mentioned in your first post. THe XXX 6.5" that I installed last night at midnight still shakes the panel. I love it, even though I've only heard it for about 20 minutes. Output is phenomenal.

audioholic
03-08-2005, 09:41 PM
cement it....haha

Don't laugh, Ive used concrete for a deadener on cars. I concreted the doors in my last project vehicle actually. Very dead doors. :D

paikiah
03-08-2005, 11:57 PM
I'm sure all SPL participants would want to use concrete, if weight was not an issue. I think I'll use my resin clay instead.. think it'll help it some ways.

DFW40
03-09-2005, 10:21 AM
what makes that foam there better then something i can pick up at walmart? i noticed when i have my mids in my doors playing my door rattles pretty bad on the outside. would that foam stuff placed behind the speaker help to stop that?

The heavy rattling and vibrating will be stopped mostly from a dynamat or peel and seal. This stuff really helps keep the metal from moving/vibrating caused by the pressure changes and the low freq. output. The foam I mentioned is just like egg crate with a sticky side to it. This stuff really helps with the absorbing of the higher frequencies and some of the upper midbass frequencies. But if you have the room I would also recommend putting the pad in this link right behind your mid. It is a really soft rubber that you glue to the door that really absorbs the rear wave. I used all three methods last night for my new Diamond mids M661 and OMG what a friggin difference. You can turn the subs off and the mids still play very low and have the perfect punch to them.




http://www.partsexpress.com/pe/showdetl.cfm?&DID=7&Partnumber=268-242

iceteebone
03-09-2005, 10:28 AM
The heavy rattling and vibrating will be stopped mostly from a dynamat or peel and seal. This stuff really helps keep the metal from moving/vibrating caused by the pressure changes and the low freq. output. The foam I mentioned is just like egg crate with a sticky side to it. This stuff really helps with the absorbing of the higher frequencies and some of the upper midbass frequencies. But if you have the room I would also recommend putting the pad in this link right behind your mid. It is a really soft rubber that you glue to the door that really absorbs the rear wave. I used all three methods last night for my new Diamond mids M661 and OMG what a friggin difference. You can turn the subs off and the mids still play very low and have the perfect punch to them.




http://www.partsexpress.com/pe/showdetl.cfm?&DID=7&Partnumber=268-242


is that pad cuttable? there is a ridge that sticks out like an inch behind my speaker so i couldn't mount that pad flush on the back of my speaker.

DFW40
03-09-2005, 11:10 AM
is that pad cuttable? there is a ridge that sticks out like an inch behind my speaker so i couldn't mount that pad flush on the back of my speaker.

Yes, it feels like jello but stronger and tastes worse. Think of it like a large piece of sandwich meat. It is a great sound absorber for all freq, look up dynasorb, same type thing.

swaptrex
03-09-2005, 11:16 AM
is that foam similar to secondskin's luxury liner? would it work well for reducing road noise if i put a layer over deadening in my hatch and possibly doors. and would it adhere well with simply 3m adhesive? seems like it would come off very easy.

DFW40
03-09-2005, 12:22 PM
Not sure about roadnoise I would think that dynamat would be best for roadnoise and that soft rubber stuff would work but I've never seen big sheets of it and it is expensive

foam with 1 sticky side (egg crate like)
http://www.partsexpress.com/pe/showdetl.cfm?&DID=7&Partnumber=260-520

Jello like soft rubber, needs an adhesive
http://www.partsexpress.com/pe/showdetl.cfm?&DID=7&Partnumber=268-242

dynamat
http://www.crutchfield.com/S-OCTslm1GgAU/cgi-bin/ProdView.asp?wm=fp&I=15410415&g=181250

iceteebone
03-09-2005, 12:28 PM
Not sure about roadnoise I would think that dynamat would be best for roadnoise and that soft rubber stuff would work but I've never seen big sheets of it and it is expensive

foam with 1 sticky side (egg crate like)
http://www.partsexpress.com/pe/showdetl.cfm?&DID=7&Partnumber=260-520

Jello like soft rubber, needs an adhesive
http://www.partsexpress.com/pe/showdetl.cfm?&DID=7&Partnumber=268-242

dynamat
http://www.crutchfield.com/S-OCTslm1GgAU/cgi-bin/ProdView.asp?wm=fp&I=15410415&g=181250


i think i'll just go with the foam since it's only $7.

Rand McNally
03-23-2005, 05:51 PM
What about these things? Good idea or worthless?

http://www.crutchfield.com/S-S8NQVzZnwZk/cgi-bin/ProdView.asp?g=762&I=237XT652

squeak9798
03-23-2005, 05:55 PM
What about these things? Good idea or worthless?

http://www.crutchfield.com/S-S8NQVzZnwZk/cgi-bin/ProdView.asp?g=762&I=237XT652


Definitely worth it to protect the speaker. However, I'd probably cut the bottom out of it, so it doesn't act as an enclosure

Rand McNally
03-23-2005, 06:01 PM
Definitely worth it to protect the speaker. However, I'd probably cut the bottom out of it, so it doesn't act as an enclosure

And that would be bad, acting as an enclosure? I am new to this audio stuff. I have a 01 Jeep Cherokee and am going to replace the front and rears with Infinity 6002i's. Just wanting to do it right the first time...

Acidburn
03-23-2005, 06:03 PM
And that would be bad, acting as an enclosure? I am new to this audio stuff. I have a 01 Jeep Cherokee and am going to replace the front and rears with Infinity 6002i's. Just wanting to do it right the first time...

yep, thats bad
most speakers are designed to play in an Infinite Baffle situation

iceteebone
03-23-2005, 06:04 PM
if you cut the bottoms out of them wouldn't that make them useless? water will still get on your speakers then. i was thinking about getting them things because i took my speakers out and had a chunk of ice on the magnet.

Acidburn
03-23-2005, 06:06 PM
if you cut the bottoms out of them wouldn't that make them useless? water will still get on your speakers then. i was thinking about getting them things because i took my speakers out and had a chunk of ice on the magnet.

well, moisture from the air can still get in, but it cant drip on them from above which definitely helps

squeak9798
03-23-2005, 08:15 PM
yep, thats bad
most speakers are designed to play in an Infinite Baffle situation


Infinite baffle meaning that there is no enclosure

twoohfour
03-24-2005, 02:44 AM
Just thought i'd add my 2 cents on the whole deadening concept.

I recently did double layers of eDead v1 in my friends 2001 Forester and it helps loads. I would definitely reccomend putting deadener on literally every nook and cranny though. Cover any nonfunctional door holes, but if you do so, put sound deadener on all the metal BEHIND the door holes too if taht makes sense.

eDead v1 SE > Dynamat Xtreme :emb:

twoohfour
03-24-2005, 02:53 AM
Jello like soft rubber, needs an adhesive
http://www.partsexpress.com/pe/showdetl.cfm?&DID=7&Partnumber=268-242


Wait... the idea is to put this behind the speaker in the door, not literally ON it, correct?

derek33
03-24-2005, 07:37 AM
I have a few questions if you dont mind.
I understand where to apply the edead in the door panel, but where would that piece of foam go? and how does the foam seal the door off more than the edead?

squeak9798
03-24-2005, 09:26 AM
Wait... the idea is to put this behind the speaker in the door, not literally ON it, correct?

Yes! It goes directly behind the speaker.

squeak9798
03-24-2005, 09:30 AM
I have a few questions if you dont mind.
I understand where to apply the edead in the door panel, but where would that piece of foam go? and how does the foam seal the door off more than the edead?


What foam, the acoustic foam like THIS (http://www.partsexpress.com/pe/showdetl.cfm?&DID=7&Partnumber=260-520)?? That foam would cover the the door panel that's behind the speaker, applied over the "regular" sound deadener. Since "regular" sound deadening is just simply mass loading the panel (changing is resonant frequency, which makes it rattle less), you apply the foam over it to barrier load the panel (i.e. to actually absorb the soundwaves).

derek33
03-24-2005, 09:44 AM
i see. so its just a more efficient way of sealing off the doors then the stock piece. so i should still put one layer of this in, even though i will be adding 3 layers of edead vs1.0

squeak9798
03-24-2005, 10:01 AM
It doesn't "seal off the door", it absorbs the soundwaves. Unless you are talking about the foam speaker baffles??

MetalMaxima
03-24-2005, 10:19 AM
What about adding something like Spectrum Sludge and then a layer of 8lb. carpet padding? Would that not be both mass loading and vibrational damping?

DFW40
03-24-2005, 11:11 AM
Carpet padding woud work. Be careful when adding this foam that you do not overstuff because you might not be able to get the panel back on because the foam will be pushing out. I ran in to this on a couple of spots and had to remove foam in certain areas.

MetalMaxima
03-24-2005, 11:17 AM
Would one not also be able to apply the padding to the back of the doorpanel itself, since the purpose of this layer is to cancel frequencies? It woiuld essentially cover the same perimiter, just in a different location.

squeak9798
03-24-2005, 11:36 AM
Would one not also be able to apply the padding to the back of the doorpanel itself, since the purpose of this layer is to cancel frequencies? It woiuld essentially cover the same perimiter, just in a different location.


As opposed to applying it to inside the door, or in addition to??

MetalMaxima
03-24-2005, 11:46 AM
As opposed to applying it to inside the door, or in addition to??

As opposed to applying inside the door.

squeak9798
03-24-2005, 12:03 PM
You would still want to apply it to the inside of the door.

Schuey2002
03-29-2005, 03:15 PM
Will this "acoustic foam" absorb water?

It rains like a motha over here, and I really want to try some of this foam, I just don't want a bunch of water-laden sponges sealed inside my door.. Anyone? :emb:

Defiler
03-29-2005, 05:00 PM
I just did my doors. Did the outer part with two layers of Peal and Seal, three behind the speaker itself, and then used Liquid Nails to apply a layer of 1/2" Hair Pile on top of that. Then sealed all the holes on the inner door with A/C ducting tape and did a layer of peal and seal over that. Doors sound like a Lexus now when you shut them.

squeak9798
03-29-2005, 05:02 PM
Just be sure not to seal the holes on the bottom of the door that allow water to escape....that would be bad.


Will this "acoustic foam" absorb water?


Possibly.