Hertz HX 300 Enclosure Help

[TITUS1985]

hey Joe, if you get this message I'm having trouble designing a box. I bought another Hertz HX 300 so I'm trying to figure out and enclosure for 2 12's now. I can go 36 inches wide and 14.5 high and then pretty much anything deep. I don't know if this sounds good but I was thinking about doing 36 x 14.5 x 18 inches and that gives me 4.2 cubes about and then trying to tune it 35hz again I'm a little stuck on how long to make the port, or ports? (because I was thinking about having each sub have its own box and port but make it look like its all one box) thanks again.

[Joe X]

The same as above but for two subs, check the notes below the pic:

Enclosure Specifications:

Fb = 35 Hz
Vb = 3 ft^3

External Height = 14 in
External Width = 36 in
External Depth = 18.5 in

Port Width = 4 in

Cut Sheet List:

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

External Enclosure Parts:

2x Front = 16 x 12 1/2
Back = 36 x 12 1/2

Left & Right Sides: 17 x 12 1/2

Top & Bottom = 36 x 18 1/2

Shared Port Internal Assembly Parts:

2 x Front to Back = 15 x 12 1/2
2 x Extension = 9 1/2 x 12 1/2

Assembly guide (generic dimensions):

Important notes:

- The 45s if you want to do them are 2 1/2" wide except the one/ones inside the port, if you want that let me know.

- 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 4" of free airspace in front of it for proper operation.

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

[AI James]

these subs like a 1.75 per arrangement from my findings. I'd built for these numerous times.