Use this electronics calculation for a first-pass component, converter, signal, motor, or sensor estimate when the stated operating conditions and units match the device data.

Impedance (Ω)

Driver nominal impedance.

Capacitance (µF)

Series capacitor value in microfarads.

Compute first-order crossover corner frequency fcHz = 1 / (2 * pi * zohmsOhms * capacitanceUf * 1e-6). The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Crossover (Hz)

-3 dB corner frequency of the RC network.

• Loudspeaker impedance, sensitivity, enclosure volume, crossover, and SPL depend on frequency, driver parameters, baffle and room acoustics, thermal compression, excursion, distortion, and measurement distance. Nominal impedance is not constant resistance.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Check the result against the current datasheet and worst-case operating corners, then verify the circuit or measurement with simulation and bench testing where failure matters.

• RC Cutoff Frequency Calculator

  Compute the first-order RC low-pass cutoff frequency fc = 1 / (2 * pi * R * C), where the output falls 3 dB.

• Audio Limiter Attack Time

  First-order limiter envelope attack time constant from observed 10% and 90% response-crossing times.

• Capacitive Reactance Calculator

  Compute capacitive reactance XC = 1 / (2 * pi * f * C), which shrinks as frequency or capacitance grows.