Active electronic crossover power amplifier system

The specific circuit of this system is shown in Figure 9. The external input signal from the front stage is first sent to the buffer composed of IC A.
The signal output by 1CA is divided into two channels and sent to IC respectively]. The second-order BUTTER WORTH high- and low-pass filters composed of 1C2 and IC
3, Ic4 have their slope set at 24d B/oct and the frequency division point set at 4kHz. The divided signal is then sent to the filter
composed of 1CB Icc The buffer performs impedance transformation to match the impedance of the subsequent power amplifier .