Design a speaker box
in your browser.

Describe the driver, pick an alignment, and get the tuning, the response curves, a 3D cabinet you can spin, and a cut list you can take to the saw.

Open the calculator

No account, no install, nothing to pay.

The calculator: driver parameters on the left, a 3D cut-away of a 4th-order bandpass cabinet, and SPL and impedance curves below.

Sealed, ported, bandpass, horn

One solver behind all of them, so SPL, impedance, cone excursion and vent air speed always agree with each other. Change the alignment and every curve, dimension and coverage map follows.

The enclosure tab set to a 4th-order bandpass, beside top and side coverage maps at 40 Hz.

A cut list, not just a number

The air inside a box is not the box. Panel thickness, the driver, the vents and the bracing all take up room, so the volume you tune for and the box you build are different sizes — and this works out both.

The cabinet tab, showing external dimensions, net and gross volume, board area and a panel cut list.

Draw the parts that can't be solved

Handle recesses, terminal pockets, a corner knocked off to clear a castor. The model editor opens on the solved cabinet and gives it the gestures you already know — line, rectangle, circle, push/pull.

The model editor, showing the cabinet as coloured boards with the driver cut-out, and snapping options.

Free to use