Why Chamber A Dual Sub Sealed Enclosure?

[rollerdj 10+ year member]

the subs can push on each other. I really don't know why except for that, but it does happen. my friend had 2 8's in a sealed box and they messed up because there was only 1 chamber for both subs.

wat? That's non scence. Other than bracing, the other upside, like has ben posted before, is that if one sub blows, the other working one won't be playing in a box that is now twice the size it needs to be. Now if u never really plan on pushing your subs to their limit, then single chamber will be fine.

 

[Immacomputer 10+ year member]

the subs can push on each other. I really don't know why except for that, but it does happen. my friend had 2 8's in a sealed box and they messed up because there was only 1 chamber for both subs.

I really doubt that is the reason. It may be the conclusion your friend came to, but I don't believe that for one second.

And if one sub blows, it's not the size that is the issue but the fact that the other sub becomes a passive radiator (a port basically) with very low mass. Low mass means high tuning which means that it will unload below that frequency. That can cause the other driver to bottom out and damage itself mechanically.

 

[DidUHearThat? 10+ year member]

When both drivers are working properly there is no real advantage, other than box strenghting, which can be achived other ways. The real advantage of seperate chambers is when one of the drives is not working properly then things change for the other driver as well.

So to sum up, with dual chambers you get added stiffening and increased reliablity. Really it's not a big issue and plenty of great sub boxes don't have seperate chambers.

 

[ThatChevyGuy 5,000+ posts]

so you're sayin that if i had 4 15's in a single chamber box 8 cubes, they would play the same as 4 chambered box? BULLSHIT. Been there, done that. They will bottom out and be sloppy as hell.

 

[DidUHearThat? 10+ year member]

so you're sayin that if i had 4 15's in a single chamber box 8 cubes, they would play the same as 4 chambered box? BULLSHIT. Been there, done that. They will bottom out and be sloppy as hell.

Yes. Other than added stiffness and reliablity, the physics is the same. All 4 compress the air, so you get 4 times the compression for 4 times the volume. In split chambers you'd have 1/4th the compression in 1/4 the volume. Same difference.

BTW, since you have a JBL pro logo, most JBL pro cabinets with dual 15's are in a single chamber. Maybe they don't know shit either?

 

[Immacomputer 10+ year member]

so you're sayin that if i had 4 15's in a single chamber box 8 cubes, they would play the same as 4 chambered box? BULLSHIT. Been there, done that. They will bottom out and be sloppy as hell.

Sounds like a problem with uneven loading in the enclosure and not proper pressure transfer. That's a design issue, not a number of chambers issue. Sure, having them all in their own chamber is one way of getting equal loading but not the only way.

 

[armcclure]

so you're sayin that if i had 4 15's in a single chamber box 8 cubes, they would play the same as 4 chambered box? BULLSHIT. Been there, done that. They will bottom out and be sloppy as hell.

I can only IMAGINE the amount the sides and top of the box would flex in an 8' unchambered box.... i.e. NOT GOOD!!!

What i'm saying is that i agree, but only for this application. In a smaller box their shouldn't be a problem as long as (as mentioned earlier) both subs are operating properly....