Pros & Cons to sound deadening in sealed box?

[crankinaway]

The factory sub came with a very loosely placed piece of insulataion. Are there benefits to keeping it, adding more, or removing it altogether?

Is this just a personal preference on the type of sound your box produces or is their a method to the maddness?

 

[4X50 Exploder]

Yes ther is a madness to the method. Take a look at this... http://www.dynamat.com/technical_sound_dbates_intro.html
You do not have to go with a particular brand but these guys do a lot of reserch and make a grate range of products...

 

[Maniak]

I "think" he is talking about using polyfill in the sub box, not stuff to put on the walls of the vehicle to stiffen it up.

~Mark

 

[4X50 Exploder]

Polly fill and other loose material is an attempt/method of achieving the results shown in the subwoofer/trunk artical... The matt materials do a much better job...

 

[crankinaway]

I "think" he is talking about using polyfill in the sub box, not stuff to put on the walls of the vehicle to stiffen it up.

~Mark

Yes. So if I could dynamat the inside of the box it is essentially the same as using polyfil, but a much better option?

Would I see any major benefit over the factory stuffing? I do have an aftermarket sub installed in the box.

 

[4X50 Exploder]

There is a complete science around this and it boils down to pers. preferance. Do you want tight or musshy bass? Look into your aftermarket sub and make sure the enclosure is the recomended Cubic Feet of space for your model. I personaly swear by the matting, give it a try and see how you like the sound...

 

[crankinaway]

What creates mushy bass, using fill or leaving the box empty? The sub is matched to the space in the box

 

[4X50 Exploder]

An unsealed box tends to be mushy, Ported = louder but not as punchy, fiber filled = slightly quieter, sealed with dyna-mat type material = tight distortion free...

 

[crankinaway]

Thanks for some examples.

 

[aznboi3644]

sound damping mat will do nothing for a proper sealed enclosure.

Polyfill and stuffing only makes the enclosure "seem" up to 20 percent larger than it is.

poor sound comes from a poor enclosure.

4X50 I disagree with ported being not as punchy or tight as a sealed enclosure....it is all about the design...I'm not talking about how all prefab ported enclosures sound...there is no one size fits all.

As for saying damping mat will do the same as stuffing...completely false statement

 

[jrford]

When i rebuilt my OEM sub enclosure it used both, Dynomat on the outside and as much poly fill i could fit. Since it went up to a 10" i also had to seal the speaker which i did with latex caulk and rubber seals, seemed to come out airtight. Worked for me very well.
The stock was .5cu/ft.

 

[BigBoom]

sound damping mat will do nothing for a proper sealed enclosure.

Polyfill and stuffing only makes the enclosure "seem" up to 20 percent larger than it is.

poor sound comes from a poor enclosure.

4X50 I disagree with ported being not as punchy or tight as a sealed enclosure....it is all about the design...I'm not talking about how all prefab ported enclosures sound...there is no one size fits all.

As for saying damping mat will do the same as stuffing...completely false statement

i'm glad someone is here to catch false information. a ported box designed properly can sound ever bit as good if not better than a sealed box