how to build a box

[binterpid 10+ year member]

i cant not figure out how to build a box right. when ever I do my calcultions it never works out to what the computers are getting.

for instace for a box that is

14" H

38" W

14" D

i multiple these together and then divide by 1728 and get 4.0023 cu ft

but when I enter it in the calc I get 3 cu ft why?

the computer doesnt account for speaker dis either and I know wood dis is not the much. so whats wrong?

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[NhustlaR 10+ year member]

youre not taking the 3/4 MDF board you will be using. The dimentions are the outer dimentions, not the internal

good day

 

[Jordantyler 10+ year member]

http://www.accelerator-pedal.com/ported-box.asp go there

 

[maldecido33 10+ year member]

for instace for a box that is 14" H

38" W

14" D

i multiple these together and then divide by 1728 and get 4.0023 cu ft

but when I enter it in the calc I get 3 cu ft why?

account for the thickness of the wood. assuming you're using the standard 3/4" MDF:

(14-1.5)*(38-1.5)*(14-1.5)=x

12.5*36.5*12.5=x

5703.125=x

5703.125/1728 = 3.3 cu ft.

you subtract 1.5 because there are two pieces of wood for which you are subtracting the thickness. hence 3/4 x 2 = 1.5.

 

[binterpid 10+ year member]

thanx for the help

 

[NhustlaR 10+ year member]

psst. dont listen to jordan. that site isnt as accurate as HE thinks

 

[wgaede 10+ year member]

psst. dont listen to jordan. that site isnt as accurate as HE thinks

She //content.invisioncic.com/y282845/emoticons/yumyum.gif.0556df42231b304b9c995aefd13928a8.gif

 

[Jordantyler 10+ year member]

Yah SHE....sorry i got that website and it worked fine for me so HA

 

[NhustlaR 10+ year member]

my b. sorry for the disrespect. but that site still isnt tooooooo reliable.

 

[Jordantyler 10+ year member]

sorry i just was tryin to help..

 

[NhustlaR 10+ year member]

i understand...

 

[Jordantyler 10+ year member]

what kind of system do u have ? nhustlar