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Ideal RC High-Pass Frequency

Calculate the electrical corner of a series capacitor and resistive load, with explicit limits for real loudspeaker crossover design.

Use this result well

Inputs that matter
Resistive load (Ω), Series capacitance (µF)
Output to expect
Electrical −3 dB corner
  • Check the units and required inputs before comparing results.
  • Keep the assumptions with a copied result so you can reproduce the calculation later.
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Reference & details

How it works

Ideal RC high-pass corner frequency

fc = 1/(2πRC), with C in farads; ideal first-order asymptotic slope = 6.0206 dB/octave An ideal first-order RC network. A loudspeaker has frequency-dependent impedance and an acoustic response; nominal ohms alone do not define an acoustic crossover. Component tolerance, source impedance, resonance, phase and power ratings are excluded. Do not choose driver protection or speaker-controller settings from this number alone.

Updated: September 2026

Example Scenarios

Calculate the electrical corner of a series capacitor feeding an ideal resistive load, with negligible source resistance.

Common Mistakes to Avoid

Applying ideal rc high-pass corner frequency outside its stated assumptions

A loudspeaker has frequency-dependent impedance and an acoustic response; nominal ohms alone do not define an acoustic crossover. Component tolerance, source impedance, resonance, phase and power ratings are excluded. Do not choose driver protection or speaker-controller settings from this number alone.

FAQ

No. It is an electrical RC corner under the stated assumptions.

No. Their transfer functions and component relationships differ.

About Ideal RC High-Pass Frequency

Calculate the electrical corner of a series capacitor and resistive load, with explicit limits for real loudspeaker crossover design. Choose the mode that matches your measurements or study design, enter the stated units and keep the method and limits with the result.