What is the function of frequency divider

The function of the frequency divider is: 1. Frequency division, that is, power distribution of each unit, reducing the acoustic interference distortion of each unit during operation; 2. Protecting the speakers, the frequency divider can provide different speakers The optimal working frequency required by each is used to make up for the acoustic defects of the unit in a certain frequency band; 3. Increase the layering of the sound and reduce the phenomenon of mutual interference of sound waves.

The operating environment of this tutorial: Windows 10 system, DELL G3 computer.

What is the function of frequency divider

Its functions are:

1. Frequency division. The frequency divider can reasonably distribute the power of each unit and reduce the acoustic interference distortion that occurs in each unit during operation.

2. Protect the speakers. The crossover can provide the optimal operating frequencies required by different speakers, make up for the sound defects of the unit in a certain frequency band, and allow various speakers to work more reasonably and safely.

3. Increase the sound layering. The crossover can reduce the interference between sound waves, and the sound will become extra clear, and the timbre will be better and more layered.

crossover

The crossover is a circuit setting inside the speaker

The analog crossover is a circuit device inside the speaker that separates the input analog audio signal into treble, midrange, and bass Wait for different parts, and then send them to the corresponding high, mid and bass speaker units for playback. The reason for this is that no single speaker can perfectly reproduce all frequency bands of the sound.

The frequency divider refers to distinguishing the sound signals of different frequency bands, amplifying them respectively, and then sending them to the speakers of the corresponding frequency bands for replay. Electronic frequency division processing is required for high-quality sound reproduction.

The crossover is the "brain" in the speaker and is crucial to the quality of the sound. The music signal output by the power amplifier must be processed by the filter element in the crossover to allow the signal of a specific frequency of each unit to pass. It is necessary to design the frequency divider of the speaker scientifically, reasonably and rigorously in order to effectively modify the different characteristics of the speaker units and optimize the combination, so that each unit can maximize its strengths and avoid weaknesses, fully exert its respective potential, and change the frequency response of each frequency band. Only when the sound and image phase is smooth and the sound and image phase is accurate can the music played in the high, medium and bass sound layers be clear-cut, well-timed, comfortable, broad and natural.

Principle

From the circuit structure point of view, the frequency divider is essentially composed of The LC filter network composed of capacitors and inductors. The treble channel is a high-pass filter, which only allows high-frequency signals to pass and blocks low-frequency signals; the bass channel is just the opposite, it only allows low-frequency signals to pass and blocks high-frequency signals; the mid-range channel is It is a band-pass filter, except that the frequencies between the two crossover points, one low and one high, can pass, but both high-frequency components and low-frequency components will be blocked. In actual crossovers, sometimes in order to balance the sensitivity difference between the high and low units, an attenuation resistor is added; in addition, some crossovers also add an impedance compensation network composed of resistors and capacitors for the purpose of Make the impedance curve of the speaker flatter to make it easier for the amplifier to drive.

is located after the power amplifier and is installed in the speaker. Through the LC filter network, the power audio signal output by the power amplifier is divided into bass, midrange and treble, and is sent to the respective speakers respectively. It is simple to connect and easy to use, but it consumes power, appears audio valleys, and produces crossover distortion. Its parameters are directly related to the speaker impedance, and the speaker impedance is a function of frequency, which deviates greatly from the nominal value, so the error It is also large and not conducive to adjustment.

The device that divides the frequency of weak audio signals is located in front of the power amplifier. After frequency division, separate power amplifiers are used to amplify each audio frequency band signal, and then sent to the corresponding speaker units. Because the current is small, it can be implemented with a smaller power electronic active filter, which is easier to adjust and reduces power loss and interference between speaker units. The signal loss is small and the sound quality is good. However, this method requires an independent power amplifier for each channel, which has high cost and complex circuit structure. It is used in professional sound reinforcement systems.

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