The frequency divider is located in front of the power amplifier. After dividing the audio signal, it is allocated to each power amplifier according to different frequency bands. Each power amplifier sends audio signals of different frequency bands to each speaker. Due to the small current, low-power electronic active can be used. Filter implementation. The advantages are easy adjustment, high electro-acoustic index, small signal loss and good sound quality. However, it is not allowed to use an independent power amplifier for each way in this way, so the cost is high and the circuit structure is complicated, which is suitable for a professional sound reinforcement system.
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