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SAD calculator

This spreadsheet is the Swiss Army knife for subwoofer configurations. It helps you design, in real-time, cardioid configurations like end-fire and gradient. Horizontal arrays such as physical arcs and straight delay‑tapered arrays.

You can use up to 12 speakers with omnidirectional, cardioid, and super-cardioid speaker patterns. Apply low- and high‑pass filters. Look at absolute and relative arrival times.

It displays frequency and phase responses for up to 7 microphones, and shows you SPL, polar, and beamwidth plots. The comprehensive info‑panel will assist you in making design decisions, and nearly everything can be normalized in order to study relative differences.

As of version 1.4 results can be exported into Meyer Sound's MAPP XT™ for increased precision.

The exhaustive 71‑page manual covers all features and contains several tutorials.

This calculator investigates (frequency) crossover alignment by virtue of time‑aligning wavelet responses as well as matching and overlapping phase traces. Regardless, either approach will lead to the same outcome.

This calculator demonstrates the effect of phase offset when adding two sine waves or two instances of the same broadband signal (48 Points-Per-Octave).


This calculator allows you to approximate the position of the acoustic center for sealed and vented subwoofers based on their physical dimensions and driver diameter.