planning enclosure

[CranberryYumYum 10+ year member]

box dimensions

38 * 13 * 15.98=

7894.12 in³ =

4.56835 ft³

tuned to 32hz

Bracing with 1 in dowel rod

up/down

r=.5 h=15.95

3.142 * .25 * 15.94 =

12.5 in³ =

0.007233 ft³

front/back

r=.5 h 12.97

3.142 * .25* 12.97 =

10.188 in³ =

0.005895 ft³

probably two of these.. perpendicular or parallel

so this leaves either 4.553884 for parallel or 4.555222 for perpendicular, up/down and front/back

plus sub displacement of .19

4.363884 parallel..........

and for port area, with 57.25 in² slotted, ~50% for aero is 28.625 in²

so a 6in aero port will be about 13.62 in long with the flare, with 28.26 in² without. round is also about 55% more efficient than slot so.. i think all my math is good, but someone may prove me wrong

so that's a displacement of 366.2 in³ = 0.211921 ft³

with displacements in consideration it is 4.151963 ft³

how would i bring this into my equation? average the non displaced and the displaced and take that and use it in the equation, or should i simply add the displacement of the port BACK into the box dimensions and forget about everything else? //content.invisioncic.com/y282845/emoticons/yumyum.gif.0556df42231b304b9c995aefd13928a8.gif

yes, the winisd is modeled in a slotted enclosure but i did all the calculations separate, with the vent at 0

i'll use mdf this time //content.invisioncic.com/y282845/emoticons/fyi.gif.9f1f679348da7204ce960cfc74bca8e0.gif

thanks in advance guys

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[CranberryYumYum 10+ year member]

due to overwhelming support of my first design i'm gonna try something else.. i have a few ideas for slot ports so i am gonna attempt to do one.. can anyone help me with the dimensions i need? i need help badly

all dimensions are internal by the way.. 30-32 hz tuning. any and all help appreciated

 

[SmokeyDog 10+ year member]

one sub or two

 

[CranberryYumYum 10+ year member]

one sub. it isn't this easy, is it?

well i just realized if my previous specs are internal i need to have 15.98 not 14.48.... so if it's this easy i'll be a little pissed

 

[CranberryYumYum 10+ year member]

nope, it isn't; i have to add port displacement i guess? or does winisd do that for you?

 

[SmokeyDog 10+ year member]

with that space and a sq port i would say you want about 70sq inches of port. 16 sq inch per cubic foot and to get as low as 32 you would need about a 34 inch long port 13 high 6 wide if you move the hz to about 38 it would be around 21 inches long you could alway make a changeable port i dont know what oyu want it for. but at 32 hz 34 inches long your 4 inches from the back just rember when useing a port that you want the air to move out of the box as easy as possable

 

[CranberryYumYum 10+ year member]

thanks man