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View Full Version : Sealed box 1.75 cubic feet per section

gothsm
10-24-2007, 06:32 PM
I have a trunk with a MAX of 37 Wide, 16 Tall, & 34 Inches front to back floor space.

anyone have a good blueprint?:cool:

johnson
10-24-2007, 07:00 PM
http://www.bcae1.com/spboxnew2.htm

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

avoid cube shape enclosures

gothsm
10-24-2007, 07:16 PM
avoid cube shape enclosures

why is that?

gothsm
10-24-2007, 07:29 PM
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
10-24-2007, 09:10 PM
bump, anyone?

bjfish11
10-24-2007, 09:24 PM
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
10-24-2007, 09:27 PM
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 :D

James Bang
10-24-2007, 09:29 PM
http://www.the12volt.com/caraudio/boxcalcs.asp#por

bjfish11
10-24-2007, 09:30 PM
I get 1.749 per.... Ill run through it again...

luvinthebass
10-24-2007, 09:31 PM

bjfish11
10-24-2007, 09:32 PM
Yep, if you need 1.75, your right where you need to be. Before sub displacement, if thats not already figured in...

gothsm
10-24-2007, 10:36 PM
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
10-25-2007, 01:05 PM
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
10-25-2007, 01:08 PM
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 ? :)

gothsm
10-25-2007, 01:28 PM
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 :(

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