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Crossovers

First-order crossover

Calculate the series inductor for a woofer and series capacitor for a tweeter.

Inputs

Example values

Min 10 · max 40,000

Greater than 0 · max 1,000

Greater than 0 · max 1,000

Point or comma for decimals.

Results

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The calculation

Lwoofer = Rwoofer / (2πfc)
Ctweeter = 1 / (2πfc × Rtweeter)
L in H; C in F

Assumptions & limits

Assumes resistive loads, ideal components and zero source impedance. Electrical slopes do not include the drivers’ acoustic responses. Measure the complete loudspeaker before choosing final parts.

Background: Passive crossover design · Elliott Sound Products
Hifi Kit · Audio calculatorsIdeal models. Real builds need measurements.