The sound is composed of several parts.Bar speakers sales

　　1. Mixer and sound source equipment

　　The sound source equipment includes microphones, phonographs, cassette (disc) recorders, compact disc players (CD players), tuners and karaoke machines, etc., which are used to provide a variety of audio signals.

　　The mixer is the command center in the audio system. It can receive multiple sound source signals with different impedances and different levels, and perform signal processing. It can also perform mixing, redistribution and grouping, and provide for the next level Multiple output terminals for audio signals. The mixer also has monitoring, signal display and intercom functions. Some mixers are also equipped with a reverb effect processor. After the singing is processed by reverberation, it will make the timbre thicker and increase the fullness and sense of space. European and American reverberation effect processors can simulate the sound effects of European concert halls, disco dance halls, jazz music, rock music, stadiums, theaters, etc. after reverberating the sound signal.

　　2. Signal processing part

　　Audio signal processing equipment is also called audio signal processing device, including equalizer, compressor/expander, delayer, noise reducer, auditory exciter, etc. The purpose and function of these equipment is to modify the signal in order to beautify the tone , To achieve a more beautiful sound or to obtain some special effects; the second is to improve the quality of the transmission channel itself, in order to improve the signal-to-noise ratio and reduce distortion.

　　3. The output part of the audio system-power amplifier and speakers

　　The power amplifier is an important unit in the professional audio system. The audio signal from the mixer is processed by the compressor, equalizer, and exciter, and then sent to the power amplifier, which amplifies the energy of the audio signal to drive the speaker and send the sound into the sound field. The power amplifier of professional audio is mainly composed of pre-amplification, pre-excitation, excitation, power amplification, protection system, display system and power supply. The speaker is a very important part of professional audio, and it is also one of the most unique units, because speakers of different structures have their own different styles, different characteristics, and produce different sound effects.

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