The power frequency divider located behind the power amplifier and is placed inside the speaker. The LC audio filter network (the LC filter principle) divides the power audio signal output by the power amplifier into bass, midrange and treble, and sends them to the speakers of the respective frequency bands. . The connection is simple and convenient to use, but power consumption, audio valleys will occur, cross distortion will occur, its parameters are directly related to the speaker impedance, and the impedance of the speaker is a function of frequency, which deviates greatly from the nominal value, so the error is also larger, not conducive to adjustment.
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