does this seem ok for 4 OA 15s?

[jeffrm]

So does this look better

[jeffrm]

Bump

[Joe X]

Running those numbers by my own methods results in very similar results:

Enclosure Specifications:

Fb = 31.9 Hz
Vb = 13.1 ft^3

External Height = 35 in
External Width = 49 in
External Depth = 21 in

Port Width = 6 in

Cut Sheet List:

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

External Enclosure Parts:

2 x Front & Back (3 parts) = 49 x 35

Left & Right Sides = 18 3/4 x 33 1/2

Top & Bottom = 49 x 18 3/4

Shared Port Internal Assembly Parts:

2 x Front to Back = 15 3/4 x 33 1/2
2 x Extension = 3 1/2 x 33 1/2

It's better than before no doubt.

Still in my view it will lack somewhat towards the midbass region, anyways you can get a parametric equalizer to fix up things a bit if you don't like the results.