isobaric box

[unrated 10+ year member]

i have a photobucket account but i cant up load that type of file

what type of file is it, save sketchup in 2D

 

[IamDeMan 5,000+ posts]

Take whatever enclosure volume you had calculated for the two non-iso R's and cut it in half.

Actually wouldn't he use 1/4 of the space he used for 2 in a isobaric? I thought Iso allowed you to use HALF the requirements of 1 driver?

It's half the enclosure size of a single subwoofer, not the pair.

OK I was right in my thinking.

 

[brokeitagain 10+ year member]

these are from the dimensions you posted earlier if you get me the dimensions you need i can redo them

in order to stack those you are going to need to use a spacer ring in between them to keep the surrounds from rubbing each other, you did not mention if you want ported or sealed

 

[BrianChia 10+ year member]

Every isobaric pair is treated like a single driver with HALF the Vas double the Mms and double BL. So the enclosure volume for 1 driver might be 2 cf. For 2 drivers it would be 4 cf. For 1 isobaric pair it would be 1cf. For 2 isobaric pairs (4 drivers) it would be 2 cf.

So Jim is right.

 

[brokeitagain 10+ year member]

actually squeak is right.by your math

 

[BrianChia 10+ year member]

explain please?

1 isobarik pair (2 drivers) is half the size of 1 non-isobarik driver

2 isobarik pair (4 drivers) is half the size of 2 non-isobarik drivers

OP is using 4 drivers (2 isobarik pair)

EDIT:

Haha, I'm an idiot. OP is only using 2 drivers (1 pair). I can't read. FTL.

 

[brokeitagain 10+ year member]

hey everyone, im in a bit of a jam, i have a 03 trailblazer EXT and i have 2 15" Rs, now my prob is i have very small room to mount these bad boys, my max box sixe is 46L x 22.5H x 16D, now i thought id cut the box down for an isobaric enclosure, so i can mount my 4 amps on a angle on each side of the inverted sub, can any1 help me out with an isobaric box or point me into the right direction to some1 that can, the only thing i know to do is reverse polarity of the sub, i will pay for a sketchup or any plans, just pm me
thanks

i read only 2 drivers

EDIT: You beat me to it

 

[IamDeMan 5,000+ posts]

Every isobaric pair is treated like a single driver with HALF the Vas double the Mms and double BL. So the enclosure volume for 1 driver might be 2 cf. For 2 drivers it would be 4 cf. For 1 isobaric pair it would be 1cf. For 2 isobaric pairs (4 drivers) it would be 2 cf.
So Jim is right.

If the guys was doing a pair of isos, yes. He isn't though. He is using the pair of drivers he has to make [1] iso(2 drivers).

 

[IamDeMan 5,000+ posts]

EDIT: You beat me to it

Bah, same here.

 

[BrianChia 10+ year member]

 

[brokeitagain 10+ year member]

HOLY SHIT!!!!! I failed like a mofo compared to that. Nice Work Brian!

 

[Bake 10+ year member]

Hells yeah, bad a$$ Sketch Brian.

 

[unrated 10+ year member]

if any1 is wondering what the window is at the bottom of the box is to view a second battery in the storage unit in the trailblazer

Thank You Brian Chia for an awesome box design, i cant waite to build this bad boy

if any1 is interested heres whats going in

pioneer 7800 CD Player

Valor DVD player

TKO 12.5 flip down monitor

2 15" Alpine Type R

2 Hifonics BXI-2006D

2 Hifonics Zeus 4 Chan

4 Sets Alpine 6.5 mid

 

[audioholic 5,000+ posts]

I dont really see the point in putting a window in a isobaric box, one motor is already exposed. But whatever floats your boat. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[djman37 5,000+ posts]

I don't think he'll see much improvement in ISO loading type-R's. The isobaric works by stiffening the cone to allow it two function properly in less airspace. From what I've seen, the type-r has a 100% coverage dustcap which = no benefit in clamshelling.

My .02.