Speaker Tools

Crossover Slope Calculator

Calculate capacitor and inductor values for Butterworth, Linkwitz-Riley, and Bessel slopes in multi-driver speakers. Compare slopes and design smooth frequency transitions.

Low-Pass (Woofer)

Inductor (L):
0.00 mH
Capacitor (C):
0.00 µF

High-Pass (Tweeter)

Capacitor (C):
0.00 µF
Inductor (L):
0.00 mH
Slope Characteristics
Selected Slope: Butterworth
Roll-off: 12 dB/octave
Recommended Use: General 2-way speakers
Phase Characteristics: Standard

Crossover Slope Calculator – Audio Design Tool

Overview

This Crossover Slope Calculator helps you compute speaker crossover filter slopes, including high‑pass and low‑pass roll‑offs, based on your desired frequency and filter order. Designed for audio technicians and DIY speaker builders, this free online tool works right in your browser without downloads.

Who Should Use This Tool

  • DIY speaker builders
  • Audio engineers
  • Home audio enthusiasts
  • Car audio system designers
  • Professional installers working with passive crossover networks

Core Concepts

  • Passive crossover network design
  • High-pass and low-pass filters
  • Speaker impedance (Ω)
  • Roll-off slope (dB/oct)
  • Phase alignment and summing

Formulas Used

Capacitor (C)

C = 1 / (2π × f × R)

Inductor (L)

L = R / (2π × f)

Step-by-Step Instructions

  1. Enter crossover frequency (Hz)
  2. Select speaker impedance (Ω)
  3. Choose slope type (Butterworth, Linkwitz-Riley, Bessel)
  4. Calculate component values
  5. Implement components into passive crossover network

Frequently Asked Questions

The crossover slope defines how quickly frequencies are attenuated beyond the crossover point. Butterworth, Linkwitz-Riley, and Bessel each have different roll-off and phase characteristics.

Slope type affects phase response, driver overlap, and overall sound quality. Steeper slopes reduce overlap but increase phase shift, gentler slopes smooth transitions.

Yes, it calculates components for each driver in 2-way or multi-way passive crossovers.