Fourth order active filter

Observing the frequency response curves of the two speakers , we found that VI) the 176-8X woofer had a peak at about 4-5kHz, and the
frequency response curve of the tweeter was relatively flat, so we decided to set the rating point at 4kHo and use 12dB/ The attenuation slope of oct
is 18dB for the high-pass filter. The attenuation slope of oct, a 6dB crossover point, the frequency divider is shown in the figure