BoxLab: Speaker Box Designer

BoxLab is the complete loudspeaker design tool for your phone. Start from your driver's Thiele/Small parameters and end up with the final design, 3D dimensions, charts and a shareable PDF. ENCLOSURE DESIGN • Sealed box with rigorous Qtc, Fc, F3 calculations — canonical T/S model • Bass reflex with 5 alignment families (B4, QB3, C4, SBB4, SC4) • 4th-order bandpass • Passive radiator (Small 1974 model with Qmp and Fp tuning) • Horn (exponential, tractrix, Le Cléac'h, hyperbolic, conical) PASSIVE CROSSOVER 2/3-WAY • Butterworth, Linkwitz-Riley, Bessel filters (1st-4th order) • Simulation with real driver impedance (motional impedance included) • Zobel network + L-pad for tweeter attenuation • Manual override of every L/C value MULTI-DRIVER CONFIGURATIONS • Parallel, Series, Series-Parallel • Isobaric Series / Parallel (Vas halved → half the enclosure size) • Push-Pull with HD2 cancellation (~12 dB) INTEGRATED 3D RENDERING • Cabinet in oblique projection for every project • 6 ratio presets: Golden, EBU, Sepmeyer, Louden, Cube, Custom • Drivers, port and passive radiator placed on the baffle • Internal/external dimensions, total panel area MEASUREMENT TOOLS • Real-time SPL meter with A/C/Z weighting + LAeq • 1/3-octave spectrum (16 Hz - 16 kHz) • In-room measurement (Pro): pink noise or sweep + mic → measured vs predicted overlay • HD2/HD3/THD distortion analysis (Pro) with push-pull toggle DATABASE & PROJECTS • Unlimited driver database • Paste-import drivers directly from datasheets — the parser extracts Fs, Qts, Vas etc. automatically • 4 demo drivers preloaded • Save projects and multi-module Systems (woofer + tweeter + crossover) • PDF export with vector charts, share and print OFFLINE & PRIVACY • 100% offline, no connection required • No data collected, no analytics, no ads • 9 languages: IT, EN, DE, FR, ES, JA, ZH, ZH-Hant, KO PRO ONE-TIME PURCHASE The free version includes sealed box, bass reflex, 2-way crossover, 3D box dimensions, the SPL meter, the full driver database and up to 3 saved projects. Pro unlocks bandpass, passive radiator, horn, 3-way crossover, in-room measurement, distortion, multi-module systems, PDF export and unlimited projects. One-time payment, no subscriptions. Mathematically validated: 93 unit tests cover Thiele/Small, multi-driver, crossover and the parameter parser. For: DIY hobbyists, speaker builders, audio technicians, acoustics students.