View Full Version : help me
07-23-2003, 01:26 PM
can someone design me a ported box for a 15. the sub that will be used is in my sig. the only problem is i dont have the box specs for this sub. i havent got it yet and when it comes i want the box built already.can sombody just give me a good 15 inch box design made for spl.
07-24-2003, 03:35 PM
I would recommend in getting the T/S parameters from Audiobahn and then build your box. I could just say build a 4cu' and port it to 40Hz but that may not work for that particular sub...then again it may. Rather than just building a box and slapping a sub in it at least try to make it right. I am more than willing to help you out but I am not one to just build a box that might work. If you get the parameters, pm me or e-mail me and I will be more than happy to help out.
07-25-2003, 12:04 PM
On the Audiobahn site 3.1 cubes ar recomended.
07-25-2003, 12:10 PM
At 28.4 Hz.
Click Here - For the specs. Its the third page down
07-25-2003, 12:12 PM
Click Here (http://www.audiobahninc.com/tech/2002Wooferpecs.pdf) , the hyperlink didnt work the first time.
07-25-2003, 12:44 PM
With those parameters and WinISD, a 3cu' box ported to 42Hz will give you a nice peak at 47Hz...pretty loud.
If you need dimensions, give the L x W x H you are willing to work with and we can go from there.
07-25-2003, 12:53 PM
3 cubes too small..
3.5-4, tuned mid 30's.
07-25-2003, 01:21 PM
Why u say that, 3 cubes shouldnt be too samll, shouldnt it.
07-26-2003, 10:49 AM
True, the bigger the box the better. I just threw and example out there until we know how much room he wants to work with.
07-28-2003, 01:51 AM
sorry for taking so long i was at a car show in calgary
the length has to be 36 inches so it will fit anything else pretty much for width and height as long as it is not to big
07-28-2003, 09:32 AM
When you say 36" long is that how long you want it or is that the max? Also, how big is too big?
07-28-2003, 03:45 PM
my max dimensions are 36x18x18
07-29-2003, 11:00 AM
Let's use 36" L x 17" D x 18" H.
This will give us internal dimensions of:
34.5 x 15.5 x 16.5 / 1728 = 5.1cu'
sub disp. = .47 port disp. = .725
5.1 - (.47 + .725) = 3.905cu' total air space.
A box that is 4cu' tuned to 43Hz needs a port 12" long. (according to WinISD. Tuned to 43Hz with a peak of 5.6dB @ 46Hz.)
A port that is 16.5" high needs a port correction of 8.25". Which gives us a total port length of 20.25" long.
In the drawings I have the external and internal dimensions.
Sombody please check these numbers. You said you wanted a SPL box so I shot for a peak at 46Hz.
07-29-2003, 09:01 PM
awsome thanks for the help il start the box asap and tell you what ill hit with it cause im going to my first comp on the 16th im gonna put it in my friends civic
edit: how wide is the port?
if you could can you give me a pieces list that says how big each piece is and what it is cause i dont want to screw up and have to redo some pieces
07-30-2003, 09:49 AM
The top and bottom will be 36" L x 17" D
The sides will be 17" L x 16.5" H
The back will be 34.5" L x 16.5" H
The front will be 31.5" L x 16.5" H
One peice 16.5" H x 12.5" L
One piece 16.5" H x 3.25" L
...using 3/4 MDF
The port will be 3" wide (sorry, must have left that out)
Make sure to print out the pics so you can see where/how the pieces join together. If you need better ones, e-mail me @ email@example.com and I can get some better, more detailed ones for you.