dyna pads or foam

[KyleBechtold 5,000+ posts]

Anyone ever compare those speaker pads vs the eggcrate or foam(how did you seal this from water)?

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[KyleBechtold 5,000+ posts]

anybody? or if anyone has experience with either.. did it help? i am in the process of buying more deadener and want to know if i should throw some dyna pads or the foam in the cart

 

[I Like Waffle]

eggcarton foam has little or no use for deadening IMO. I put a bunch of it under my dashboard (which is removable easily with quite a bit of room underneath) to help keep all my stuff in place just incase and stop other things from rattling. I have a 4ch and x-overs under there //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

If youre wanting to seal up the speakers i would use the the foam premade baffles. Your doors have built in drains if you didnt know btw. In mine i just have the baffles to let the water (if it gets in) run overtop of the baffles and not onto the speakers, and theres a hole in the bottom of it for the speakers to fire into the door cavity. I tried it both ways and i dont like the sound with them sealed in the baffles. A properly deadened door sounds 100x better than using them.

Edit, i just thought about something, are you talking about the eggcarton foam like they put actual eggs in, or the eggcarton foam like some mattress pads are made of?

 

[JimJ 5,000+ posts]

Unless I completely missed it, he's not talking about deadening. He's talking about the deflex pads used behind speakers to break up standing waves and improve midrange response.

Closed cell egg crate (closed cell material is weatherproof, can be found as sleeping bag pads in camping stores) can work very well, as deeper material will help with lower frequencies, but you're probably going to be limited by where the window is.

 

[Xprime4 10+ year member]

I did put some in my last car. I haven't really notice a difference beside the fact that virtually, the cone seems more in control. Probably a placebo tough ...

 

[Rudy 10+ year member]

I did put some in my last car. I haven't really notice a difference beside the fact that virtually, the cone seems more in control. Probably a placebo tough ...

That's about it. For any of these things to work in a door, the foam has to be as thick as or for "deflex" type pads the grooves have to be as deep as 1/4 of the wavelength of the frequency you are trying to control. If the material is 1 inch thick, it will be effective with frequencies above 3.4 kHz. Are your door mounted speakers producing anything in that range? If it's 1/4 inch thick it's 13 kHz and above.

You can't absorb or "break up" the backwave from midrange or midbass speakers in a door. You need to seal the frontwave from the backwave and call it a day.

 

[KyleBechtold 5,000+ posts]

Unless I completely missed it, he's not talking about deadening. He's talking about the deflex pads used behind speakers to break up standing waves and improve midrange response.
Closed cell egg crate (closed cell material is weatherproof, can be found as sleeping bag pads in camping stores) can work very well, as deeper material will help with lower frequencies, but you're probably going to be limited by where the window is.

the window is far enough away from the outer panel i could do some foam.. but i won't have lower frequencies coming out of my mids.. well... 60+hz dunno if thats considered low for that.. which would be better?

 

[gqjeff 10+ year member]

That's about it. For any of these things to work in a door, the foam has to be as thick as or for "deflex" type pads the grooves have to be as deep as 1/4 of the wavelength of the frequency you are trying to control. If the material is 1 inch thick, it will be effective with frequencies above 3.4 kHz. Are your door mounted speakers producing anything in that range? If it's 1/4 inch thick it's 13 kHz and above.
You can't absorb or "break up" the backwave from midrange or midbass speakers in a door. You need to seal the frontwave from the backwave and call it a day.

So should I use a deflex pad over my Overkill pro also in the doors or some accustical closed cell foam or nothing at all?

 

[KyleBechtold 5,000+ posts]

So should I use a deflex pad over my Overkill pro also in the doors or some accustical closed cell foam or nothing at all?

he is saying nothing will help.. idk though.. i'm not experienced in acoustics

 

[Rudy 10+ year member]

So should I use a deflex pad over my Overkill pro also in the doors or some accustical closed cell foam or nothing at all?

The only constructive use for foam in a door is between the inner skin and the door card to prevent buzzing and rattles. Vibration damper and barriers work great in doors. Anything else between the sheet metal skins isn't going to do enough to be worth doing. MUCH better to cut a baffle out of something solid to mount your speaker to and seal the inner skin the best you can. The only thing you really care about as far as the back wave is concerned is that it not mix with the front wave.

 

[gqjeff 10+ year member]

The only constructive use for foam in a door is between the inner skin and the door card to prevent buzzing and rattles. Vibration damper and barriers work great in doors. Anything else between the sheet metal skins isn't going to do enough to be worth doing. MUCH better to cut a baffle out of something solid to mount your speaker to and seal the inner skin the best you can. The only thing you really care about as far as the back wave is concerned is that it not mix with the front wave.

Then I am good to go my doors are sealed like fort knox outer, inner out and inside and door card LOL...