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View Full Version : Can someone please make me box plans?



THXdts
07-28-2006, 11:41 PM
Yes, it's usually not nice to ask for free, but what can I say. I don't know how to do box plans. If anyone has any spare time in there day, and feel like doing this, it would be awesome. I am looking for 1.5 cu ft net tuned to 34 Hz with 20 sq. in. of vent area. It is what Sound Splinter sugguests for the 12" RL-p. Thanks alot. If possible at all, I would like it to me more square..not like 29x13x13. That just seems akward as a box shape to me. Unless it takes away from the performance, then just do whatever.

bubbagumper6
07-28-2006, 11:44 PM
talk to Decipha....great guy/designer

jj4475
07-28-2006, 11:45 PM
http://www.audiogearreviews.com/tech/tools/box_calculator-rectangle.asp

xluben
07-29-2006, 12:10 AM
here's a squarish box:

http://www.subwoofertools.com/forum/ported-box.asp?Ew=19&Eh=19&Dia=6&Xmax=12&Vd=.1&NumW=1&Vb=1.5&Fb=34&Qts=&Vas=&Fs=&CE=0

look at all those port walls :) and due to all those 180 degree turns the ports have to be wider, and therefore longer, making the gross box volume large (4.18 ft^3).

if you go with a less square design it'll be much easier:

http://www.subwoofertools.com/forum/ported-box.asp?Ew=32&Eh=15&Dia=6&Xmax=12&Vd=.1&NumW=1&Vb=1.5&Fb=34&Qts=&Vas=&Fs=&CE=0

easier to make, port area more normal, shorter port, gross box volume <3 ft^3

what vehicle is it going in? i'd just start with something as wide as the space you have, and a desirable height, and let the math figure out your depth. i don't really see any advantage in going with a cube.

PV Audio
07-29-2006, 01:15 AM
There's a sticky at the top of the forum..

mobeious
07-29-2006, 01:47 AM
http://www.caraudio.com/gallery/1/4/2/9/8/3d2.JPG there ya go

THXdts
07-29-2006, 07:15 PM
here's a squarish box:

http://www.subwoofertools.com/forum/ported-box.asp?Ew=19&Eh=19&Dia=6&Xmax=12&Vd=.1&NumW=1&Vb=1.5&Fb=34&Qts=&Vas=&Fs=&CE=0

look at all those port walls :) and due to all those 180 degree turns the ports have to be wider, and therefore longer, making the gross box volume large (4.18 ft^3).

if you go with a less square design it'll be much easier:

http://www.subwoofertools.com/forum/ported-box.asp?Ew=32&Eh=15&Dia=6&Xmax=12&Vd=.1&NumW=1&Vb=1.5&Fb=34&Qts=&Vas=&Fs=&CE=0

easier to make, port area more normal, shorter port, gross box volume <3 ft^3

what vehicle is it going in? i'd just start with something as wide as the space you have, and a desirable height, and let the math figure out your depth. i don't really see any advantage in going with a cube.
That's cool but the only reason I don't like that one is that it gives me like 10 port walls. I only want like one..

xluben
07-29-2006, 08:28 PM
here's a more square design with only two port walls (similar to the one mobeious did in sketch up):

http://www.subwoofertools.com/forum/ported-box.asp?Ew=18&Eh=14&Dia=6&Xmax=12&Vd=.1&NumW=1&Vb=1.5&Fb=34&Qts=&Vas=&Fs=&CE=0

i like that site because it gives you a full cut sheet, so everything is real easy :)

PV Audio
07-29-2006, 08:55 PM
You don't want a cube no matter what. I believe it's the second worst shape possible for a speaker enclosure unless you round off every single edge. Rectangular prisms are used for a reason; they have medium performance with the most simplicity.

THXdts
07-29-2006, 09:27 PM
http://www.subwoofertools.com/forum/ported-box.asp?Ew=32&Eh=15&Dia=6&Xmax=12&Vd=.1&NumW=1&Vb=1.5&Fb=34&Qts=&Vas=&Fs=&CE=0

So this one posted is probably the best? And thanks xluben, thanks. That site is indeed cool, but the only flaw is that whenever you put in dimensions it always gives you a **** load of port walls.

PV Audio
07-29-2006, 09:36 PM
Yep looks like it, but it's free, and you get what you pay for.

xluben
07-29-2006, 09:53 PM
it doesn't have to be that long and thin, you could do something more like this:

http://www.subwoofertools.com/forum/ported-box.asp?Ew=24&Eh=14&Dia=6&Xmax=12&Vd=.1&NumW=1&Vb=1.5&Fb=34&Qts=&Vas=&Fs=&CE=0

i wanted to know the max width and height you have in your vehicle and then i could come up with something that would fit nicely.

THXdts
07-30-2006, 12:53 AM
it doesn't have to be that long and thin, you could do something more like this:

http://www.subwoofertools.com/forum/ported-box.asp?Ew=24&Eh=14&Dia=6&Xmax=12&Vd=.1&NumW=1&Vb=1.5&Fb=34&Qts=&Vas=&Fs=&CE=0

i wanted to know the max width and height you have in your vehicle and then i could come up with something that would fit nicely.
That one looks ****ing perfect. The only problem that I see is that you are using 12mm for the xmax and displacement at .1 cu ft :uhoh:.

THXdts
07-30-2006, 08:26 PM
Eh?

xluben
07-30-2006, 08:52 PM
http://www.subwoofertools.com/forum/ported-box.asp?Ew=24&Eh=14&Dia=6&Xmax=12&Vd=.18&NumW=1&Vb=1.5&Fb=34&Qts=&Vas=&Fs=&CE=0

fixed the driver displacement. the site just uses xmax to determine port area, you can change it to get whatever port area you need.

THXdts
07-30-2006, 10:03 PM
http://www.subwoofertools.com/forum/ported-box.asp?Ew=24&Eh=14&Dia=6&Xmax=12&Vd=.18&NumW=1&Vb=1.5&Fb=34&Qts=&Vas=&Fs=&CE=0

fixed the driver displacement. the site just uses xmax to determine port area, you can change it to get whatever port area you need.
Cool. Thanks.

djman37
07-30-2006, 10:57 PM
You don't want a cube no matter what. I believe it's the second worst shape possible for a speaker enclosure unless you round off every single edge. Rectangular prisms are used for a reason; they have medium performance with the most simplicity.

huh?:eyebrow:

xluben
07-30-2006, 11:08 PM
that's what 3D rectangle's are called (along with other things):

http://en.wikipedia.org/wiki/Rectangular_prism

they don't have a nice name like cube (3D square).

djman37
07-30-2006, 11:26 PM
i opt for this term: rectangular parallelepiped :D

the FIRST term: a cuboid is a solid figure bounded by six rectangular faces: a rectangular box.
Why not just stick with the simpler term?
Now I know more than I needed to know about cuboid shapes and the technical terms for them.

xluben
07-30-2006, 11:42 PM
haha, my multivariable calc teacher uses the 'parallelepiped' term a lot when describing surfaces.