Yamaha DME64N Owner's Manual page 355

• Bessel
For curves where phase characteristics are important, Bessel has gentler attenuation than
Butterworth, and there is little distortion of the waveform when square waves are passed
through.
• Linkwitz (Linkwitz-Riley)
As second-order filters, the sum of the output voltages for LPF and HPF have a gain of 0 dB
across the entire band. The pass band is flat, but the cutoff frequency gain is -6 dB.
Butterworth
Bessel
Linkwitz-Riley
Chapter 6 Component Guide
DME Designer Owner's Manual 355