Speaker Crossover Calculator

Butterworth filters provide maximally flat frequency response, Linkwitz-Riley filters ensure perfect acoustic summation with minimal phase shift, and Bessel filters offer the best time-domain response with minimal group delay distortion.

Choose crossover frequencies based on your drivers' capabilities. Typical ranges are 200-800Hz for woofer-to-midrange and 2000-5000Hz for midrange-to-tweeter. Avoid crossing over near driver resonant frequencies or where response drops significantly.

1st order crossovers (6dB/octave) have minimal phase shift but less steep rolloff. Higher orders provide steeper slopes (12dB, 18dB, 24dB/octave) for better driver protection but introduce more phase shift and component complexity.

2-way crossovers split frequencies between two drivers (woofer and tweeter), while 3-way systems add a midrange driver requiring two crossover points. This creates different filter topologies and component value requirements.

Use 5% or better tolerance for capacitors and 2% or better for inductors. High-quality components ensure accurate crossover frequencies and consistent performance. Consider using non-polarized capacitors for audio applications.

Zobel circuits help stabilize driver impedance at high frequencies, making the crossover behavior more predictable. They're especially useful with inductive drivers or when precise crossover performance is critical.

These calculations are for passive crossovers using capacitors and inductors. Active crossovers use electronic circuits with different design principles, though the crossover frequencies and filter types remain relevant concepts.

Incorrect values will shift the crossover frequency and may create frequency response dips or peaks. This can result in poor sound quality, driver damage from out-of-band signals, or unbalanced frequency response between drivers.