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  #1  
Old 03-29-2012, 04:42 PM
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Default port help please

ok im going to use this box here------------------





open torres and try these specs:

h = 15
w = 36
d = 19

port dims:
3 common walls
h = 13.5
w = 3.5
l = 24

misc specs:
woofer displacment = .28

specs:
3.57 cubes
13.24" of port per cube
47.25 total port area3.5 cubes
33-35hz
about 12-14" of port per cube



open torres and try these specs:

h = 15
w = 36
d = 19

port dims:
3 common walls
h = 13.5
w = 3.5
l = 24

misc specs:
woofer displacment = .28

specs:
3.57 cubes
13.24" of port per cube
47.25 total port area
this is the box im going to use but i need to know how to do the port bend to make it add up right can anyone help me out with this please


now i need help with the port ? is the port should go in 14.75 and bend and then another 5" to be right. if thats not right can someone help me please

screen shots

http://i1095.photobucket.com/albums/...lett/Box-1.png
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  #2  
Old 03-29-2012, 04:47 PM
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where is the port facing
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Old 03-29-2012, 05:03 PM
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Quote:
Originally Posted by Carlos12 View Post
where is the port facing
back
it will be
h = 13.5
w = 3.5
l = 24

and the 24 has to be bent thats y i need to know L of first port cut and L of second port cut
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Old 03-29-2012, 05:07 PM
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Just measure the center line of the port keeping the same distance from the wall the whole way.

Your box is 19" deep. Your port is 24" long and 3.5" wide. So, centerline needs to stay 1.75" off of the wall. Centerline to the first turn should be 17.25" (with your panel cut being 16.5"). Add the .75" for the panel and the 1.75" (other half of the port) make another panel 4.25". That'll do it.

Effective port length there will actually be 25.75" because of the common wall, but I just use that as a fudge factor. If you're concerned with it, make the 2nd panel 2.5"
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Last edited by TaylorFade; 03-29-2012 at 05:10 PM.
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Old 03-29-2012, 05:11 PM
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wel since the port is on 1 side, if u make the first port wall screw into the baffle from behind then u will take ur 19", subtract 1.5" (.75" for front baffle n .75" for back wall), ur left with 17.5", now subtract ur width (3.5") ur left with 14", so ur first part of the port should be cut to be 14" long n 13.5" high, which is the physical port cut out, so 19.75" minus the 14" u just cut is 5.75" so ur 2nd cut for the bend of ur port should be 5.75" long n 13.5" high, u screw the shorter piece into the longer piece by the side of the longer piece, if i confused the snot out of u just let me know
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  #6  
Old 03-29-2012, 05:14 PM
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Here's a stupid paint drawing. Thin lines being the centerline of your port and the bold the panels. That diagonal red line represents effective port length.

box.jpg

[Edit: Depending on how you actually assemble it, don't forget to account for the thickness of the baffle in the port length.]
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Last edited by TaylorFade; 03-29-2012 at 05:19 PM.
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Old 03-29-2012, 07:22 PM
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ok if i want to do something crazy like this ports how do i figure it out

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Last edited by scfaust; 03-29-2012 at 07:29 PM.
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  #8  
Old 03-29-2012, 07:36 PM
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Quote:
Originally Posted by scfaust View Post
ok if i want to do something crazy like this ports how do i figure it out

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  #9  
Old 03-29-2012, 08:54 PM
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ok screw that then i cant get nuff port area with them
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Old 03-30-2012, 12:30 AM
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Idk how to do the triangle ones, like it might be the same as a having a square port then just cut in half diagnally n ur good, or if u cut diagnally u have to add a lil more length, but to check for port area of a triangle, its base times height divided by 2, the base n height r the 2 shorter legths of a right triangle, there ya go ;-)
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