Type of Crossover

Type by Order

• 1st order – 6 dB / octave slope.
• 2nd order – 12 dB / octave slope.
• 3rd order – 18 dB / octave slope.
• 4th order – 24 dB / octave slope.

Type by

• Linkwitz-Riley crossover – which matches the attenuation slopes, so they combine for a flat response at the crossover point.
• Butterworth crossover – which creates a small peak in response at the crossover point.
• Bessel crossover – is somewhere between the first two.

Circuits

1. First order high/low/band-pass filter
2. Second order high/low/band-pass filter
3. Third order high/low/band-pass filter
4. L-pad
5. Parallel notch filter
6. Zobel network
7. Serial notch filter