A set of professional stage audio equipment is essential for an outstanding stage performance. At present, there are many types of stage audio equipment on the market with different functions, which brings a certain degree of difficulty to the choice of audio equipment. In fact, under normal circumstances, professional stage audio equipment consists of microphone + mixer + amplifier + speaker. In addition to the microphone, the audio source sometimes requires DVDs, computers to play music, etc. You can also use computers only. But if you want professional stage sound effects, in addition to professional stage construction staff, you also need to add sound equipment such as processors, power sequencer, equalizers, and voltage limiters. Let us introduce what are the main professional stage audio equipment:

1. Mixing console: a sound mixing device with multiple channel inputs, the sound of each channel can be processed separately, with left and right channels, mixing, monitoring output, etc. It is an important equipment for sound engineers, sound recording engineers and composers to do music and sound creation.

2. Power amplifier: A device that converts audio voltage signals into rated power signals for driving speakers to produce sound. The matching condition of power amplifier power is that the output impedance of the power amplifier is equal to the load impedance of the speaker, and the output power of the power amplifier matches the nominal power of the speaker.

3. Reverberator: In the sound system of dance halls and large-scale stage lighting concert venues, a very important part is the reverberation of human voices. After the human singing is processed by reverberation, it can produce a kind of beauty of electronic sound, which makes the singing voice unique. It can conceal some defects in the voice of amateur singers, such as hoarseness, throat noise, and noisy vocal cord noise through reverberation processing, so that the voice is not so unpleasant. In addition, the reverberation sound can also make up for the lack of overtones in the timbre structure of amateur singers who have not undergone special vocal training. This is very important to the effect of stage lighting concerts.

4. Frequency divider: A circuit or device that realizes frequency division is called a frequency divider. There are many types of frequency dividers. According to the different waveforms of their frequency division signals, there are two types: sine frequency division and pulse frequency division. Its basic function is to divide the full-band audio signal into different frequency bands according to the requirements of the combined speaker, so that the speaker unit can obtain the excitation signal of the appropriate frequency band and work in the best condition.

5. Pitch shifter: As people have different voice conditions, they have different requirements for the pitch of accompaniment music when singing. Some people want to be lower, and some need to be higher. In this way, it is required that the tone of the accompaniment music should be adapted to the requirements of the singer, otherwise the singing voice and the accompaniment will feel very inharmonious. If you use an accompaniment tape, you need to use a pitch shifter for pitch shifting.

6. Compressor: It is the collective name for the combination of compressor and limiter. Its main function is to protect the power amplifier and speakers (speakers) and create special sound effects.

7. Processor: Provide sound field effects, including reverberation, delay, echo and sound equipment for special sound processing.

8. Equalizer: It is a device for boosting and attenuating different frequencies and adjusting the proportions of bass, midrange, and treble.

9. Loudspeakers and speakers: Loudspeakers are devices that convert electrical signals into acoustic signals. According to the principle, there are electric type, electromagnetic type, piezoelectric ceramic type electrostatic type and pneumatic type.

The speaker, also known as the speaker box, is a device that puts the speaker unit into the cabinet. It is not a sounding component, but a sound-assisting component that displays and enriches the bass. It can be roughly divided into three types: enclosed speakers, inverted speakers, and labyrinth speakers. The position factor of the speaker equipment in the stage is very important.

10. Microphone: A microphone is an electro-acoustic transducer that converts sound into electrical signals. It is the most diverse unit in the audio system. According to its directivity, it can be divided into non-directivity (circular), directivity (cardioid, super-cardioid) and strong directivity. Among them, non-directivity is specifically for bands pickup; directivity is used to pick up sound sources such as voice and singing; strong directivity is specifically for picking up the sound of a certain azimuth source, and the left and right sides and behind the sound are excluded from the microphone pickup space, and Special use of the principle of mutual interference phenomenon of sound waves, a slender tubular microphone made of sonic interference tube, people called gun-type microphone, used in art stage and news interview; according to the structure and scope of application distinguish dynamic microphone , Ribbon microphones, condenser microphones, pressure zone microphones-PZM, electret microphones, MS-style stereo microphones, reverberation microphones, pitch-changing microphones, etc.