Calculators
Tools & calculators
Every calculator, in one place. Each opens the tool it lives in — all backed by the same Thiele/Small engine the rest of the app uses.
Pick a driver to preview its modeled response here and across the tools.
Enclosure
Sealed boxQtc / Fc / F3 from a driver + box volume, with the modelled response.Sealed box calculatorQtc / Fc / F3 from Fs, Qts, Vas and a box volume — or solve Vb for a target Qtc.Ported / vented boxTuning Fb, vent length and peak port air velocity (chuffing).Ported box calculatorSuggested vented Vb + tuning Fb from a driver, with an EBP sealed-vs-ported recommendation.Port length calculatorVent length to tune a box to a target Fb — round/slot, multi-port, with a chuffing check.Bandpass (4th/6th)Single-driver bandpass enclosures with response + impedance.Passive radiatorPR-tuned alignment, system Fb and cone-excursion limits.Transmission lineQuarter-wave line: fundamental, response and group delay.Transmission line calculatorQuarter-wave line length for a target tuning frequency, plus line impedance.HornExponential/conical horn cutoff, throat load and response.Box dimensionsTurn a target net volume into internal/external W×H×D + a cut list.
Crossover & networks
2-/3-way crossover1st–4th order Butterworth / Linkwitz-Riley / Bessel / Chebyshev component values.L-pad / attenuationTwo-resistor L-pad for a target attenuation at constant load, with wattage.L-pad calculatorSeries + shunt resistors for a target dB of attenuation at constant load, with wattage.Zobel / impedance compFlatten a driver's rising inductive impedance (Re, Le).Baffle-step compShelf network for the half-space→free-air transition at the baffle step.Notch / contourSeries/parallel RLC traps to tame a breakup peak.Air-core inductorTurns, wire length and DCR for a target inductance (Wheeler).Standard values (E12/E6)Nearest off-the-shelf capacitor / inductor values + parallel combos.