Sealed box 1.75 cubic feet per section

[gothsm 10+ year member]

I have a trunk with a MAX of 37 Wide, 16 Tall, & 34 Inches front to back floor space.

anyone have a good blueprint?//content.invisioncic.com/y282845/emoticons/cool.gif.3bcaf8f141236c00f8044d07150e34f7.gif

Click to read more...

 

[johnson 10+ year member]

http://www.bcae1.com/spboxnew2.htm

L" x W" x H" / 1728 = cubic feet

avoid cube shape enclosures

 

[gothsm 10+ year member]

avoid cube shape enclosures

why is that?

 

[gothsm 10+ year member]

so according to that url if I where to build a box that was 16H/31W/16D with 3/4 MDF I would have a box with a total of 3.589 cubes total then I would take that and divide it by two giving me 1.7945 cubes. then do I take off another .75 for the MDF seperator?

 

[gothsm 10+ year member]

bump, anyone?

 

[bjfish11 5,000+ posts]

To deduct the volume of the divided...

take the thickness (.75) x length x width and divide it by 1728. Then take your original number of 3.589 and subtract this new number (volume of the divider). That gives you total net volume of the enclosure. To get per chamber, simply divide it by 2 now.

Hope this makes sense...

 

[gothsm 10+ year member]

hum it seems ill be needing a bigger box... I ended up with 1.4 and I need 1.75 thanks for all the post I hope to figure it out quick and get the hang of it all //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 

[James Bang 5,000+ posts]

http://www.the12volt.com/caraudio/boxcalcs.asp#por

 

[bjfish11 5,000+ posts]

I get 1.749 per.... Ill run through it again...

 

[luvinthebass 5,000+ posts]

it doesn't have to be EXACT to get the best performance from the sub/s

 

[bjfish11 5,000+ posts]

Yep, if you need 1.75, your right where you need to be. Before sub displacement, if thats not already figured in...

 

[gothsm 10+ year member]

I was not sure how to do that or what it really is honestly, do you have any ref's I can look over to figgure that out. There will be hopefully 2x 15in Alpine Type Rs

 

[gothsm 10+ year member]

with speaker displacement I am looking at a 1.5 cube per chamber, it seems I might need to increase the depth of the box

 

[ramos 5,000+ posts]

avoid cube shape enclosures

That's an old wives tale man . How is a 20-30 foot long wave going to form inside of a 1 cubic foot enclosure ? //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[gothsm 10+ year member]

I hit a snag....

The first plan was (3/4 mdf)

16 H

31 W

16 D

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

3.589 FT Cubed

3.589 / 2 (2 chambers)

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

1.7945

1.7945 - 0.75 (MDF Separator)

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

1.0445

1.0445 - 0.246(Sub Displacement)

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

WAY TO SMALL //content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif

SECOND TRY (3/4 mdf)

16 H

34 W

18 D

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

4.5 FT Cubed

4.5 - 0.75 (Seperator) - 0.246 (Displacement)

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

3.504

3.504 / 2

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

1.752 PERFECT

can someone run this second plan by so that I can verify before I buy the supply's to build