At present, the level of program source equipment and power amplifier has been very high, so the key to a sound system consisting of high-quality sound source, high-quality amplifier and speaker system is the speaker. It is an extremely important part of the entire sound system and has a great impact on the entire sound system.
Speakers have different uses in different situations, and are commonly classified in professional audio as follows:
According to the audio frequency rate: divided into full-band speakers, subwoofers and subwoofers
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 the usual small and medium-sized audio system, only one or two teams of full-range speakers can be fully responsible for the playback task.
Subwoofers and subwoofers are generally dedicated speakers that complement the low-frequency and ultra-low-frequency playback of full-band speakers. These types of speakers are generally used in large and medium-sized audio systems to enhance the intensity and shock of low-frequency playback. When used, most of them are divided by an electronic crossover (crossover), and the low frequency signal is sent to a special bass amplifier, and then the bass or subwoofer is pushed.
According to the occasion of use: divided into professional speakers and home speakers
Household speakers are generally used for home playback. They are characterized by fine sound quality and exquisite appearance. The sound pressure level is not too high and the power is relatively low.
Professional speakers are generally used in professional entertainment venues such as dance halls, karaoke halls, theaters, auditoriums and sports venues.
The professional speaker has high sensitivity, high sound pressure, good strength and high power consumption. Compared with the home speaker, its sound quality is hard and the appearance is not very delicate. The monitor speakers in professional speakers are similar in performance to the home speakers, and the appearance is generally more delicate and compact, so these monitor speakers are often used by home Hi-Fi audio systems.
According to the purpose: divided into main playback speakers, monitor speakers and return speakers, etc.
The main playback speaker is generally used as the main speaker of the sound system, and undertakes the main playback task. The performance of the main playback speaker has a great influence on the playback quality of the entire audio system. It is also possible to use a full-band speaker plus a subwoofer for combined playback.
The monitor speaker is used in the control room and recording studio for program monitoring. It has the characteristics of small distortion, wide frequency response and straightness, and little modification to the signal, so it can truly reproduce the original appearance of the program.
Back-to-back speakers, also known as stage monitors, are commonly used on stage or dance halls for actors or band members to listen to their own singing or playing sounds. This is because they are located behind the main sound-receiving speakers on the stage. They can't hear their own sounds or the performance of the band. Therefore, they can't match well or find the feeling, which seriously affects the performance. Generally, the listening speaker is made into 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 the people on the stage can be heard clearly during playback, and the sound is not fed back to the microphone. Howling.
According to the structure of the box: divided into sealed speakers, inverted speakers, labyrinth speakers, sonic tube speakers and multi-cavity resonant speakers, etc.
The most used among these types is the inverted speaker, because it is characterized by wide frequency response, high efficiency, high sound pressure, and conforms to the professional audio system speaker type. The sealed speaker has simple design and debugging. It has the advantages of wide sound and good low-frequency transient characteristics, but it has higher requirements for the sounder unit.
In the current various types of speakers, the proportion of the two types of inverted speakers and sealed speakers is mostly. The other types of speakers have many structural forms, but the proportion is small.
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