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The use of professional audio equipment skills four

source:Industry News release time:2021-09-02 Hits:     Popular:Brand bar audio wholesale

  In my last few articles, I briefly introduced the skills of mixing consoles, equalizers and compressors. In this article, I want to share with you the skills of using electronic crossovers.

  The frequency divider mentioned in a sound system generally refers to the ability to divide the audio signal in the 20Hz--20000Hz frequency band into suitable and different frequency bands, and then send them to the corresponding power amplifiers to drive the corresponding speakers. A kind of audio peripheral equipment. Because it is an electronic device used to process and distribute audio frequency signals, we usually call it: electronic crossover. I won’t say much about the detailed functions and working principle of the electronic crossover. Here I just focus on making some easy-to-understand introductions to some of the aspects that people value or are often confused. I hope it can be helpful to everyone!

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  1. Why do we use electronic crossovers

  The research of electroacoustics by our sound engineers and the continuous development of electroacoustic equipment and technology are all for one purpose: to reproduce various sound sources as faithfully as possible. Of course, we must fully utilize the current electrical Acoustic technology reproduction is unrealistic and almost impossible. As you all know, the frequency range of sound is between 20Hz and 20000Hz. The frequency range of most front-end audio processing equipment can reach this width, but the current speaker has become a bottleneck part. We want to use one or It is very difficult for a few speakers to be able to send out a wide frequency sound close to 20Hz--20000Hz, because the effective working frequency range of a single speaker is not very wide now. In view of this, electro-acoustic engineers have designed speakers that work in different frequency ranges, such as:

  1. Subwoofer: Let it work in the frequency range of about 30-200Hz.

  2. Low and mid-range speaker: Let it work in the frequency range of about 200-2000Hz.

  3. Tweeter: Let it work in the frequency range of about 2000-20000Hz.

  In this way, we can use different types of speakers working in different frequency ranges to configure a sound system that is as close as possible to the true frequency of the sound (20Hz--20000Hz). Of course, the composition and parameters of different speaker equipment are different. What I said above is a three-way system as an example. In actual use, there are other systems such as two-way or four-way, and in different audio systems Because the speakers used are different, the working frequencies of these speakers cannot be fixed and the same, but the general principles and ideas are the same.

  Then there is a question: how do we flexibly allocate audio frequencies to these different types of speakers that work in different frequency ranges? In order to solve this problem, an electronic crossover came into being. It can provide suitable frequency bands according to the needs of different speaker operating frequencies, such as:

  1.We can use an electronic crossover to send high-frequency signals to the tweeter through the power amplifier.

  2. An electronic frequency divider can be used to send the intermediate frequency signal to the midrange speaker through the power amplifier.

  3. An electronic frequency divider can be used to send the low frequency signal to the woofer through the power amplifier.

  In this way, the high, medium and low frequency signals are output independently and do not interfere with each other. Therefore, the advantages of the working frequency bands of different speakers can be used as much as possible, so that the sound reproduction of each frequency band in the audio system is more balanced, making the sound more layered and the timbre more Perfect. This is why we use electronic crossovers.


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