1. ## 27 hz slot box for 2 15 tempest just for fun plan

port area
using 12 in^2/ ft^3 = 96in^2

port height 24 inches x 4 inches = 96 in^2

net vol 8 ft^3 , tuned to 27 hz

Lv= 96in^2 * 1.84 x 10^8 / 8.00ft^3 *1728 (27/.159)^2 - (.823 * sqrt96)
Lv=36.25in long

port displacement

4.75 x 35.5 x 24 = 2.34ft^3

driver displacement = .353ft^3

net vloume = 8.00 ft^3
total displacement= 10.69 ft^3
internal volume 24H x 37W x 21D
38.5 W X 25.5 H X 21D external

hows it look ? math ok will it work ?
just did it for fun see what it would take

mat

2. ## Re: 27 hz slot box for 2 15 tempest just for fun plan

that would be SICK !.

3. ## Re: 27 hz slot box for 2 15 tempest just for fun plan

you know it will fit in my dakota and i am getting two tempest ....

4. ## Re: 27 hz slot box for 2 15 tempest just for fun plan

thats gonna be some nice BASS and SQ

5. ## Re: 27 hz slot box for 2 15 tempest just for fun plan

whats wrong with it ? i keep getting the same numbers 36.248 length and 2.34 ft^3 ?

entering my calc like this (ti83)

Lv= (96*1.84x18^8)/ (8 * 1728 * ((27/.159)^2))= 44.3120 - (.823 * sqrt(96)) =
36.2483511 up to 36.25

6. ## Re: 27 hz slot box for 2 15 tempest just for fun plan

where is the 19.75 coming from ?

i get 4.75 x 35.5 which is the lenth i get from the formula x 24 inch tall port height is there something i missing cuase i turned it ?

7. ## Re: 27 hz slot box for 2 15 tempest just for fun plan

oh ok the math is right ? diagram is wrong

8. ## Re: 27 hz slot box for 2 15 tempest just for fun plan

gotta do it the hard way.

9. ## Re: 27 hz slot box for 2 15 tempest just for fun plan

si go dow to 4 inches off the back wall and turn left till i run out of port lenth right ?

10. ## Re: 27 hz slot box for 2 15 tempest just for fun plan

i don't understand if i measure down th center of the port to 17 inches deep make the at 17 inchs which is 4 inchs off the back wall and the other port wall is inside the first it is still 4 inches off the back wall right ?

i think i misunderstanding wjat you saying the way i understand it is that you start with 4ichs to keep the port area right it has to be 4 inches at the turn so that any where along that port the measurment is 4 inchs outside wall to port wall

11. ## Re: 27 hz slot box for 2 15 tempest just for fun plan

are ya saying it only has to be 2 inches off the back wall ?

12. ## Re: 27 hz slot box for 2 15 tempest just for fun plan

this just for fun thread is pretty serious now.

13. ## Re: 27 hz slot box for 2 15 tempest just for fun plan

ohhhhhhhhhhhhhhhhhhhhhh DAH i CCCCCC

thanks alot jmac i realy enjoyed this i will rework it and try it again not to bad for a newb though eh

Mat

14. ## Re: 27 hz slot box for 2 15 tempest just for fun plan

this is fun for supa hehe

i am such a nerd

15. ## Re: 27 hz slot box for 2 15 tempest just for fun plan

hey supa C you trumpet player ? by any chance

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