Proper Door Sound Deadening and You

[alphakenny1 10+ year member]

just one.

 

[supa_c 5,000+ posts]

only 1, cmon

Did you do all of the steps, foam behind mid, hard material for gaping holes..ect

 

[alphakenny1 10+ year member]

yea we got lazy so we only did one. he's going this weekend to buy some foam and yes also hard material for the holes.

 

[supa_c 5,000+ posts]

It'll make a diference with the foam.

 

[lil azn 06 10+ year member]

I have a question. The plastic on the doors ive seen are hard but on my integra, its soft like a paper, and is loose. This will degrade the performance of the speakers, right? Even with deadening?

 

[squeak9798 5,000+ posts]

I have a question. The plastic on the doors ive seen are hard but on my integra, its soft like a paper, and is loose. This will degrade the performance of the speakers, right? Even with deadening?

??

If you are talking about the moisture barrier, just rip it down and "replace" it with sound deadening.

 

[lil azn 06 10+ year member]

this plastic thing

Wont the sound deadenin peel off due to moisture though?

 

[stevcha 10+ year member]

this plastic thing

Wont the sound deadenin peel off due to moisture though?

No, just make sure you apply the deadener using a roller or something similiar so that you get it to adhere really well.

 

[JimJ 5,000+ posts]

It'll make a diference with the foam.

You think a deflex pad behind the mid would make a big difference? If so, I'll put one in, but I'm not sure how much more good it would do considering I've got three layers on the outer door skin already.

 

[Decado 10+ year member]

You think a deflex pad behind the mid would make a big difference? If so, I'll put one in, but I'm not sure how much more good it would do considering I've got three layers on the outer door skin already.

It is to deflect the rear waves away from the speaker so that it does not cause distortion, even though you have 3 layers the rear waves will still bounce off and hit the rear of the speaker (unless you somehow created some kind of ripple surface with your deadening, lol).

 

[supa_c 5,000+ posts]

You think a deflex pad behind the mid would make a big difference? If so, I'll put one in, but I'm not sure how much more good it would do considering I've got three layers on the outer door skin already.

I did a little test to see if it made a diff.

I only applied the foam to one side of the car.

pioneer 5/4" mids in an un deadned door.

The un deadned door didnt have bass that was "pronounced" It sounded like it was just playing free air.

I put it on the other side, bass improved enough so i could gear the difference. And it cost me nothing so its definetly not counterproductive.

You should notice a difference with that t00b ear you have

 

[squeak9798 5,000+ posts]

You think a deflex pad behind the mid would make a big difference? If so, I'll put one in, but I'm not sure how much more good it would do considering I've got three layers on the outer door skin already.

As Decado said; Sound deadening is to deaden the panel from resonances. But a Deflex pad is designed to actually deflect the rear wave so it doesn't bounce off of the rear wall an back towards the speaker, muddying up the midrange. Open cell foam serves sort of the same function.....only it's supposed to absorb the rearwave rather than deflect it.

From what I've read, they can make quite a noticeable difference in the midrange area.

 

[JimJ 5,000+ posts]

I've added it to my PCx order //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

Hopefully it'll make a difference. I'd rather use deflex pads instead of open cell foam, just seems like a recipe to trap excess moisture.

 

[lil azn 06 10+ year member]

so i jus apply it on the outer part of the door correct? (where the moisture layer is) and i remove the moisture layer. Anything else to help improve sound?

 

[JimJ 5,000+ posts]

Fill all the holes in the door...make sure the only hole in the door is where the speaker cutout is.