Need HELP with Dual Sundown SA-15 Enclosure

[brianm113]

I've always found it to be louder if it's FULLY sealed off from the trunk facing forwards, but that's not always the case with everyone.

that's what I have heard, I was just concerned because i've never been able to face a box forwards and have it sound even a little good...but it was never sealed off from the trunk....I'll definitely go for it and see what happens though because that's what I've heard about most trunk builds

[brianm113]

does anybody wanna design a box for me....3.5 cubes tuned to 35? max dimensions: 40"W, 16.5"H, 30"D...port doesn't matter whether its slot or aeroport whatever whoever may wanna do this thinks will work best

[Joe X]

Done to your specs, probably will need to build inside:

Enclosure Specifications:

Fb = 35 Hz
Vb = 7 ft^3

External Height = 16.5 in
External Width = 39.5 in
External Depth = 28.25 in

Port Width = 6 1/2 in

Cut Sheet List:

* All Dimensions in Inches.
* Wood Thickness is 3/4 for all Parts.

External Enclosure Parts:

2x Front = 16 1/2 x 15
2x Front Internal = 15 x 15
Back = 39 1/2 x 15

Left & Right Sides: 26 3/4 x 15

Top & Bottom = 39 1/2 x 28 1/4

Shared Port Internal Assembly Parts:

2 x Front to Back = 18 1/4 x 15

Assembly guide (generic dimensions):

Important notes:

- The 45s if you want to do them are 2 1/2" wide.

- All boxes built outside the vehicle need to fit in their way in not just have the right dimensions.

- This box should be operated around subwoofer(s) rated power. If that´s not the case, let me know.

- The port needs 6 1/2" of free airspace in front of it for proper operation.

- Setting your amp subsonic filter to 28Hz is suggested.

[brianm113]

Done to your specs, probably will need to build inside:

Enclosure Specifications:

Fb = 35 Hz

Vb = 7 ft^3

External Height = 16.5 in

External Width = 39.5 in

External Depth = 28.25 in

Port Width = 6 1/2 in

Cut Sheet List:

* All Dimensions in Inches.

* Wood Thickness is 3/4 for all Parts.

External Enclosure Parts:

2x Front = 16 1/2 x 15

2x Front Internal = 15 x 15

Back = 39 1/2 x 15

Left & Right Sides: 26 3/4 x 15

Top & Bottom = 39 1/2 x 28 1/4

Shared Port Internal Assembly Parts:

2 x Front to Back = 18 1/4 x 15

Assembly guide (generic dimensions):

Important notes:

- The 45s if you want to do them are 2 1/2" wide.

- All boxes built outside the vehicle need to fit in their way in not just have the right dimensions.

- This box should be operated around subwoofer(s) rated power. If that´s not the case, let me know.

- The port needs 6 1/2" of free airspace in front of it for proper operation.

- Setting your amp subsonic filter to 28Hz is suggested.

SWEET!!!! Thanks Joe!!!! Definitely gonna have to build inside I was already planning on that. However a couple questions: It says the box should be operated around the woofers rated power...which on the sa15s is 600 rms each but they can take more I am giving them 600 each now but will soon be giving them 1050 each...will that change things? and it says there should be 6-1/2" of airspace in front of the port...can there be more?

[brianm113]

also how would i go about attaching the bottom to the sides while in the trunk?