About WebISD

WebISD is a browser-native loudspeaker enclosure design tool inspired by the long-loved Windows program WinISD. It runs entirely in the browser: no install, no account, no data leaves your machine.

Math & conventions

SPL is reported anechoic, 2π half-space, at 1 m.
Air properties: ρ = 1.184 kg/m³, c = 345 m/s (20 °C, 1 atm).
Sealed alignment: Q_tc = Q_ts·√(1+α), F_c = F_s·√(1+α), α = V_as/V_b.
Vented alignment: 4th-order Thiele/Small with assumed leakage Q_l = 7.
Port tuning derived from geometry with end correction (0.85 r flanged + 0.61 r free).
Excursion uses the cone displacement transfer; port velocity is computed from cone-equivalent volume velocity.

Roadmap

Saved projects synced to your account (Lovable Cloud).
Bandpass enclosures (4th & 6th order).
Multi-driver configurations and series/parallel wiring.
Export designs to PDF and CSV.
Custom user driver presets.

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