1. ## Need a vented box design. Revised with correct dimentions!

Well, I pretty much did not get the help I needed in my last thread, so I am starting a new one with the exact dimentions I have to work with, and if anyone can help me calculate the volume of this box, help me design a port, and tell me where the ports should go I would greatly appreciate it.

Here are the pictures/dimentions of all the space I have to work with in the back of my Extended cab Gmc Sierra under the bench.

FRONT

BACK

I will be putting 1 Stereo Integrity Mag D2 12" Subwoofer firing upward into the seat, and I did leave enough room for the excursion of the woofer.

The box for one subwoofer will need to be 1.5 Cubic inches tuned to 32 Hz.
Mag Specs:
Re: 3.5 Ohms
Fs: 30.2
Le: 3.5 mH
Qms: 4.75
Qes: .45
Qts: .41
Cms: 121.59
Mms: 228 g
Vas: 39.71
Sd: 480 cm^2
Bl: 18.35
Spl: 85.74 dB

2. ## Re: Need a vented box design. Revised with correct dimentions!

Originally Posted by Rc 415
Well, I pretty much did not get the help I needed in my last thread, so I am starting a new one with the exact dimentions I have to work with, and if anyone can help me calculate the volume of this box, help me design a port, and tell me where the ports should go I would greatly appreciate it.

Here are the pictures/dimentions of all the space I have to work with in the back of my Extended cab Gmc Sierra under the bench.

FRONT

BACK

I will be putting 1 Stereo Integrity Mag D2 12" Subwoofer firing upward into the seat, and I did leave enough room for the excursion of the woofer.

The box for one subwoofer will need to be 1.5 Cubic inches tuned to 32 Hz.
Mag Specs:
Re: 3.5 Ohms
Fs: 30.2
Le: 3.5 mH
Qms: 4.75
Qes: .45
Qts: .41
Cms: 121.59
Mms: 228 g
Vas: 39.71
Sd: 480 cm^2
Bl: 18.35
Spl: 85.74 dB

Dude...
mount your sub on the driver side firing up like you want.... then put two 3 inch elbow ports on the passenger side with the ends of the elbows inside the box faceing away from the sub... The elbows are about as equal to a 7" straight tube rather then if it were at a 90 degree angle as it is in the elbowe. so your tuning freq with the box that is on the top would be tuned to aprox 3.9 ft^3 tuned to about 32 hz.... Should do well. how does that sound?

3. ## Re: Need a vented box design. Revised with correct dimentions!

JoelDirt:
I would actually preferr to use Stereo Integrity's reccommended 1.5 cubes tuned to 32Hz. And if possible I'd like to stay away from Pvc as I hear it causes port noise, so aero or slot port.

I calculated the total box volume as 3.0869 Cubic Feet. Does anyone get the same?

4. ## Re: Need a vented box design. Revised with correct dimentions!

is thats the maximum space you have to work with you have 1.7cf to work with.

5. ## Re: Need a vented box design. Revised with correct dimentions!

That whole box is only 1.7 Cu Ft?

6. ## Re: Need a vented box design. Revised with correct dimentions!

i drew it up in sketch up and after you take into account wood thickness (3/4") thats what i came up with

7. ## Re: Need a vented box design. Revised with correct dimentions!

I designed it in sketchup, where do you go to calculate volume?

you cant.

9. ## Re: Need a vented box design. Revised with correct dimentions!

Well, how did you?

10. ## Re: Need a vented box design. Revised with correct dimentions!

[IMG][/IMG]

draw it up then click on the text tool, click on a surface and it will tell you how many sq" that surface is. in your case its 235.35 sq" now multiply that by how deep you box is
depth=( 14 - (2 x wood thickness))
depth=(14 - (2 x .75))
depth=(14- (1.5))
depth=12.5

so then take

(235.35 x 12.5) /1728= box volume
1.7cf=box volume

11. ## Re: Need a vented box design. Revised with correct dimentions!

Did you calculate in the play in the box?

12. ## Re: Need a vented box design. Revised with correct dimentions!

oh man nevermind i should have looked more closly at your pictures. my calculations are all wrong didnt realize you had slants in there stipid me

13. ## Re: Need a vented box design. Revised with correct dimentions!

The box diffrent measurements front to back, thats why i posted 2 pics.

14. ## Re: Need a vented box design. Revised with correct dimentions!

i'm getting 1.65 cubes before any displacement.

you can knock that down to around 1.55 cubes w/ sub displacement.

and port displacement will prolly take you to around 1.25 cubes

throw in some polyfil and you'll be fine

15. ## Re: Need a vented box design. Revised with correct dimentions!

oops, nm, didn't do the slants (didn't see em)

ignore my post

Page 1 of 3 1 2 3 Last

#### Posting Permissions

• You may not post new threads
• You may post replies
• You may post attachments
• You may edit your posts