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The classification of speakers in common professional audio

2021-02-14 83
The speaker is also called the speaker system, it is an extremely important part of the audio system. Because the sound quality of the speakers has a great impact on the entire sound system. At present, the level of program signal source equipment and power amplifiers has been made very high. Therefore, a sound system composed of high-quality sound sources, high-quality amplifiers and speaker systems, its playback quality mainly depends on the speakers.

There are many ways to classify speakers. Common classifications in professional audio are as follows:

1. Divided according to the occasion of use: divided into two categories: professional speakers and home speakers. Household speakers are generally used for home playback. They are characterized by fine and soft playback sound quality, more refined and beautiful appearance, not high playback sound pressure level, and relatively little power. Professional speakers are generally used in professional entertainment venues such as song and dance halls, karaoke halls, theaters, halls and stadiums. Generally, professional speakers have high sensitivity, high playback sound pressure, good power, and high power. Compared with household speakers, their sound quality is harder and their appearance is not very delicate. However, the performance of monitor speakers in professional speakers is close to that of home speakers, and their appearance is generally more exquisite and compact, so this type of monitor speakers are often used in home Hi-Fi audio systems.

2. According to the audio frequency: can be divided into full-band speakers, subwoofer speakers and subwoofer speakers. The so-called full-band speaker refers to the sound that can cover the low frequency, intermediate frequency and high frequency range. The lower limit frequency of the full-band speaker is generally 30Hz-60Hz, and the upper limit frequency is 15KHz-20KHz. In general small and medium-sized audio systems, only one pair or two pairs of full-band speakers can be used to fully take on the playback task. Bass speakers and subwoofers are generally dedicated speakers used to supplement the low frequency and ultra low frequency playback of full-band speakers. This type of speaker is generally used in large and medium-sized audio systems to enhance the strength and shock of low-frequency playback. When in use, most of the frequency is divided by an electronic crossover (crossover), the low frequency signal is sent to a special bass amplifier, and then the bass or subwoofer speaker is promoted.


The classification of speakers in common professional audio


3. Divided by purpose: generally can be divided into main playback speakers, monitor speakers and return speakers. The main sound box is generally used as the main sound box of the sound system to undertake the main sound reproduction task. The performance of the main playback speaker has a great impact on the playback quality of the entire audio system. You can also use a full-band speaker plus a subwoofer for combined playback.
The monitor speaker is used for program monitoring in control rooms and recording studios. It has the characteristics of small distortion, wide and flat frequency response, and little modification of the signal, so it can truly reproduce the original appearance of the program. Back-to-listening speakers, also known as stage monitor speakers, are generally used on stages or dance halls for actors or band members to monitor their singing or performance. This is because they are located behind the main sound box on the stage and cannot hear their own voice or the band's performance clearly, so they cannot cooperate well or can't find the feeling, which seriously affects the performance. Generally speaking, the return-to-listening speaker is made of a bevel shape and placed on the ground, so that it can be placed on the stage without affecting the overall shape of the stage, and it can be heard clearly by the people on the stage during playback, and the sound will not be fed back to the microphone. Howling.

4. Divided by cabinet structure: can be divided into sealed speakers, inverted speakers, labyrinth speakers, sonic tube speakers and multi-cavity resonant speakers. Among them, the most used in professional speakers is the inverted speaker, which is characterized by wide frequency response, high efficiency, and large sound pressure, which is in line with the type of professional audio system speakers. However, due to its low efficiency, it is more popular in professional speakers. Few applications, mainly used for home speakers, only a few monitor speakers adopt a closed box structure. The sealed speaker has the advantages of simple design and manufacture, wide frequency response, and good low-frequency transient characteristics, but it has higher requirements for the dial unit. At present, in all kinds of speakers, inverted speakers and sealed speakers account for the majority of the proportions. Other types of speakers have many structural forms, but they account for a small proportion.
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