Box Dimensions & Cut List
Turn a target net volume and your preferred proportions into outer dimensions and a ready-to-cut panel list.
Inputs
Volume to add back to compensate for stuff inside.
Blueprint
Cut list (butt joints)
| Panel | Qty | Size |
|---|---|---|
| Front & back baffle | ×2 | 23 1/8" × 14 7/8" |
| Top & bottom | ×2 | 21 5/8" × 13 3/8" |
| Left & right sides | ×2 | 14 7/8" × 13 3/8" |
Internal: 21.65″ × 13.38″ × 13.38″ = 63.5 L
How it works
Give the calculator the net volume your driver needs (from the sealed or ported calculators) and the shape you want, and it works backwards to the outer panel sizes.
V_internal = V_net + driver + port + bracing k = ∛( V_internal / (rH · rW · rD) ) internal H, W, D = k·rH, k·rW, k·rD outer = internal + 2 × wood thickness
Why proportions matter: a perfect cube has the same standing-wave frequency in all three directions, which reinforces one inner resonance. Avoid equal or simple-multiple dimensions (1:1:1, 1:2:2). Ratios such as 1 : 1.6 : 1 or the golden proportions spread the internal resonances out. Subs run low enough that this is a mild effect, but stuffing and bracing help too.
The cut list assumes butt joints: the front and back panels are full size, sides run full height, and the top and bottom fit between the sides. Add a few mm for the saw blade (kerf) and for the baffle cut-outs. If you double the front baffle (common for subs) the added thickness is outside, so reduce the depth ratio accordingly.