Box for (4) 1508's

[thevic24 5,000+ posts]

try about 36.5" with the same area, that should get you around 37ish. not to shure if the 1508's like tuning much lower than about 35hz.

 

[RAM_Designs 5,000+ posts]

gross volume : 4.41ft^3

- port volume: 1.41ft^3

-sub displacement: .3ft^3

-----------------------------

2.7ft^3

With a 11.25" x 6" port, you have a tuning right around 40hz, according to the carstereo.com calc.

 

[350zspl 10+ year member]

i am using 3 each at 35 hertz in 3 net off a saz 1500 with success

 

[thevic24 5,000+ posts]

i am using 3 each at 35 hertz in 3 net off a saz 1500 with success

iam running 1 tuned to about 37hz on an mtx 81000d and that little bastard gets down very well.

its in the box in my ava ^^^^^^

 

[bunkerking09 10+ year member]

gross volume : 4.41ft^3- port volume: 1.41ft^3

-sub displacement: .3ft^3

-----------------------------

2.7ft^3

With a 11.25" x 6" port, you have a tuning right around 40hz, according to the carstereo.com calc.

Thats how much the port volume is? Man, i was thinking it was a lot less for some reason.

I'll bump up the height 1 inch, that should put me over 3 cubes.

 

[DonH 5,000+ posts]

how did you get 1.41 ft^3 for the port displacement?

its 1.47ft^3 to be exact! haha

edit:

1 inch higher would give you 3.005983073ft^3

 

[DonH 5,000+ posts]

**** im ****n up today! //content.invisioncic.com/y282845/emoticons/laugh.gif.48439b2acf2cfca21620f01e7f77d1e4.gif ok so if you raise the box height to 16.75 that would be nice!

check out the screen shot

edit:

sry its tiny! so basically with the same size port just the box 1" taller you achieve 3.354 ft^3 before sub displacement and a 36.9hz tuning.

the port would be 33.5 long like your original.

 

[RAM_Designs 5,000+ posts]

how did you get 1.41 ft^3 for the port displacement?
its 1.47ft^3 to be exact! haha

edit:

I was taking into account that the first .75" doesn't count as displacement, since it's the outside of the box and not taking up any internal space.

 

[bones22 5,000+ posts]

Thats how much the port volume is? Man, i was thinking it was a lot less for some reason.
I'll bump up the height 1 inch, that should put me over 3 cubes.

you should keep them in about .5-.6ft each after disp

also tune 38-42 with them. you will be happier if you do it now rather than rebuild later.

 

[bunkerking09 10+ year member]

you should keep them in about .5-.6ft each after dispalso tune 38-42 with them. you will be happier if you do it now rather than rebuild later.

So my box should only be 2.0-2.5 cubes net? //content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif