SpeakerCalc is a graphing calculator that supports do-it-yourself cabinet design for a woofer or subwoofer loudspeaker system. It makes use of the Thiele-Small parameters provided by speaker manufacturers, and displays various response curves such as sound intensity levels and cone excursion. Closed-box, ported, and passive radiator designs can be analyzed. The results help to evaluate driver selection, cabinet size, and other enclosure construction choices. Crossover design is not covered. There are several Web sites and commercial software products that offer similar analyses, but SpeakerCalc is meant to be particularly easy to use.

Among SpeakerCalc's advanced features are real-time continuously plotted feedback on parameter adjustments, including off-axis directivity effects, and ease of parameter units conversions.

Support information will be found on this page.