Introduction to the main purpose of the difference between electronic frequency divider and ordinary frequency divider
The frequency divider separates the sounds of different frequency bands, amplifies them separately, and then sends them to the corresponding speakers for reproduction. When high-quality sounds are reproduced, electronic frequency division processing is required. The frequency of the input signal is processed so that the frequency of the output signal meets the relevant circuit. The frequency divider is divided into two types: analog frequency divider and digital frequency divider.
In the speaker system, the cabinet, the frequency divider circuit, and the loudspeaker are called the three major parts. The frequency divider is the brain of the loudspeaker, which plays an important role in whether the electroacoustic signal can be restored with high quality. Especially in the middle and high frequency parts, the function of the frequency divider is more obvious.
The frequency divider is a device that divides the weak audio signal. It is located in front of the power amplifier. After the frequency is divided, each independent power amplifier is used to amplify each audio frequency band signal, and then send it to the corresponding speaker unit. Because the current is small, it can be realized with a smaller power electronic active filter, which is easier to adjust, reducing 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, and is used in professional sound reinforcement systems.
Advantages of frequency divider1. Reasonably divide the working frequency band of each unit;
2. Reasonably distribute the power of each unit;
3. Make each unit have an appropriate phase relationship to reduce the acoustic interference distortion of each unit in the work;
4. Use the characteristics of the frequency divider circuit to make up for the acoustic defects of the unit in a certain frequency band;
5. Connect each frequency band smoothly and smoothly.
Introduction of electronic crossoverThe active circuit divides the frequency of the audio signal, uses the respective power amplifier to amplify the audio signal, and then sends it to the corresponding speaker. Because the current is small, it is easy to adjust and reduce power loss. The signal loss is small and the sound quality is good. But the cost is high, the circuit structure is complicated, and it is used in professional sound reinforcement systems.
Advantages of electronic crossoverProtect the speakers
Different speakers have different frequencies. A speaker with a larger caliber has better low-frequency characteristics and lower frequency dive. The electronic frequency divider provides the required operating frequency to compensate for the acoustic defects in a certain frequency band, so that the speaker can work reasonably and safely. Therefore, in addition to the frequency division task, the more important function is to protect the speaker equipment.
Basic crossover
Electronic frequency divider, the main task is frequency division. Due to the variety of speakers, the electronic frequency divider with what function should be configured. Commonly used are: 2 frequency division, 3 frequency division, 4 frequency division, etc., super 4 frequency division is too complicated. The frequency divider can reasonably distribute the power of each unit, so that each unit has an appropriate phase relationship, and reduces the acoustic interference distortion in the work.
Increase the level of sound
In a sound system, there are different types of speakers, and no electronic crossover is used. There are frequency overlaps and repetitions between different speakers. The sound interference becomes serious and the sound becomes fuzzy. If an electronic crossover is used to keep the speakers in the best condition, the frequency of the sound emitted is not repeated, and at the same time, the phenomenon of mutual interference is reduced, the sound will be clear, the tone will be better, and the sense of hierarchy will be better.
The difference between ordinary frequency divider and electronic frequency dividerElectronic frequency divider is a combination of active high-pass filter and active low-pass filter in analog electronic circuits. It is generally composed of op amp and resistance-capacitance components. Because there is an op amp, it must have a power supply to work normally.
The effect of electronic crossover is better than that of ordinary passive crossover, and the size of high and low frequencies can be adjusted according to your own preferences, and it is continuously adjustable, so the experience obtained is very rich . Once the ordinary LC form of frequency divider is completed, its frequency division point is determined, so it cannot be adjusted. In addition, if a dedicated chip is used as an electronic crossover, some chips also have 3D audio processing, etc., and their cost performance is also quite high.
Electronic frequency dividers also have disadvantages, that is, if they are not done properly (such as using inferior op amps, capacitors, power supplies, etc.), they will introduce larger noises, and these noises will be amplified once after the power amplifier. It will become bigger and seriously affect the sound quality. Therefore, if you want to use an electronic crossover, you must use a good electronic crossover.
The ordinary frequency divider is a combination of a high-pass filter and a low-pass filter composed of ordinary LC. It does not require power supply and consumes no energy, but it can control the flow of energy and allow the low-frequency energy to be transmitted to the woofer. The high-frequency energy is transmitted to the tweeter.
The electronic frequency divider is a signal control mode, which is added in front of the power amplifier. The ordinary frequency divider is the energy control mode, plus the front of the horn.
1. The electronic frequency divider is composed of transistors or integrated circuits. It has separate high-frequency, mid-frequency and low-frequency channels. It can only be divided by the power supply. It is also called an "active frequency divider" circuit. This circuit is a general device Before the power amplifier.
2. Ordinary frequency dividers are much simpler. They are composed of capacitors and inductance coils, and divide the frequency by inductive reactance and capacitive reactance. Ordinary frequency dividers are simple to make and easy to use, and they are generally installed before the speaker at the output end.
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