Changelog
What changed in the calculator, newest first. Summaries only — the short version of each release.
1.4.2
14 October 2026- Copy the cut list. The panel list in the cutting guide has a Copy list button. Every size is copied with its unit — mm, cm or inches, whichever the editor shows — plus the board it sits on and its thickness, ready to paste into a message or a cutting order.
1.4.1
13 October 2026- The partition gap you type is the gap that gets built. A slot vent between partitions used to be squeezed narrower when the box was too shallow for its duct, so changing the gap often did nothing. Now the gap stays as typed, and if the duct no longer fits, the vent tunes higher. The Enclosure tab shows the tuning it reaches, and a warning says how far it moved.
- Bandpass vents out the back. The slot that runs between the two rear chambers now follows the partition gap too, and its boards, divider hole and back-panel hole are all cut to the same width.
- Model output on 4th-order bandpass boxes. The vent is now tuned against the vented chamber, not the sealed one, and a slot widened in the editor is measured instead of leaving the chart blank.
1.4.0
8 October 2026- Whole sizes. Tick Whole sizes in the Cabinet settings and the outside of the box is rounded to a step that is easy to cut — 1 mm, 0.5 cm, 1 cm, ½ in or 1 in. The volume moves a little to make room, by a few percent at most.
- Volume in the summary bar. The bar above the tabs now takes the box's litres too — one chamber for sealed and ported, rear and front for a bandpass, each beside its tuning.
- Cleaner numbers. Lengths drop trailing zeros, so a side reads 50 cm rather than 50.0 cm.
1.3.0
6 October 2026- Drivers from your part of the world first. The Drivers tab lists makers from your region first — worked out from your device's timezone, and changeable with the new region menu.
- Tags on every driver. Each driver shows where its maker is from, who it is built for (car audio, pro audio or hi-fi) and traits like dual voice coil; click a tag to see more like it.
- More brands. B&C Speakers, Dayton Audio, American Bass, Tang Band and Wavecor joined the catalogue, from the makers' own published figures.
1.2.2
6 October 2026- Tidier driver picker. The Use button is gone from the community driver cards in a design — click a card to see its parameters and use it from there.
1.2.1
5 October 2026- Brands follow your search. Typing in the Drivers search looks across every brand, and the brand row shows only the brands that match, with how many results each holds — pick one to narrow the results to it.
1.2.0
5 October 2026- Browse drivers by brand. The community Drivers tab opens with a row of brands, each with its logo and how many drivers it holds; pick one to see only its drivers.
- Manufacturer catalogues. 182 Eighteen Sound drivers and the JBL Professional 2241G/H were added from the makers' own published specifications, each linked back to its source. Drivers whose published figures contradict each other were left out.
1.1.1
4 October 2026- The Driver tab shows only what needs attention. Notes on how a box type behaves by nature — a bandpass box's short bass delay, say — are no longer printed under the settings; warnings about this design, and their fixes, still are.
1.1.0
4 October 2026- A new look, in light or dark. The app is redrawn in Material's blue on calmer greys, starts in light, and switches to dark from the button at the right of the title bar — the 3D views follow it.
- New project in two steps: your speaker, then your box — four box types drawn in section, a tuning picked for you, and Done builds what is selected.
- Volume and box proportion on the Driver tab, beside the enclosure, tuning and vent, so the box can be reshaped without leaving it.
- Hold space and drag to pan in every 3D view, the model editor included.
- The model editor remembers where you were. Step out to the design or the cutting guide and come back to the same hidden boards, the same open board, and its card where you left it.
- Less to read. The model editor, the cutting guide and the Enclosure and Cabinet tabs keep their settings and figures and lose the paragraphs around them.
1.0.2
23 September 2026- Published designs carry their Model output curve. It is measured off your own boards as you publish and travels with the design, so anyone opening it sees both curves — the design, and the cabinet the boards make — without measuring anything themselves.
- The publish window says what is going with it, including when the measurement is still running and publishing now would leave the curve out.
- Designs published before today are unaffected: they show the one curve, exactly as they always have.
1.0.1
23 September 2026- More vents get measured. Both vents of a 6th-order bandpass now read off the model, including one shorter than the baffle it sits in.
- Drivers on a divider fire the way the plan says — and go on doing it after the divider has been moved in the editor.
- Sealed-off air is left out. A compartment the boards shut in that no driver or vent works against no longer counts towards the measured volume, and the panel says it was left out.
- No curve rather than a wrong one where a vent leaks out of the chamber it is supposed to be tuning.
1.0.0
23 September 2026- Response curves are solved from the cabinet you drew. Edit the boards in the model editor and the chart adds a second curve for what those boards actually make, with the design drawn dashed behind it for comparison.
- Vents are measured, not assumed. A duct that the layout had to shorten is now read at the length it really has, so the chart stops promising a tuning the box cannot reach.
- Bandpass chambers are measured apart. Each room's volume is read from the model itself rather than split by proportion.
- Drivers follow the board they sit on. Turn or move a baffle and its driver turns with it — in the viewer, in the cutting guide and in published designs.
- A rebuilt summary image. One sheet with a bigger cabinet, all five response charts (SPL, impedance, excursion, vent speed, group delay), every one of them drawn at 80% of rated power and labelled as such, with a header saying whether the figures came from your model or from the design.
- The Render view is switched off. It was a picture that fed nothing else — no dimension, no panel, no cut — while loading a chunk of its own to draw it.