Equipment Selection

1) The speaker system is the mouthpiece of the entire audio system, so it should be considered as the primary factor. The selection of speakers should start with the sensitivity and rated power of the speakers, and determine the power of each sound source. Analyze and control the sound field in the hall based on the directionality of the speaker, determine the position, input impedance, and input power of each speaker, and calculate the matching power between the speaker and the power amplifier.

2) In order to ensure the overall sound quality of the sound reinforcement system, the power amplifier should have sufficient power margin and be able to work stably for a long time. At the same time, the selected amplifier should have comprehensive technical measures in improving performance, reducing distortion, short circuit and no-load protection, and reducing temperature rise.

3) The mixing console and other equipment mixing consoles are the core parts of the entire audio system. It should have good electrical performance, stable working state, flat frequency response, and minimal harmonic distortion. There are significant differences in the functionality of the mixing stations, which requires selecting different numbers of input channels and output groups of mixing stations based on the functional requirements of the entire system. In addition, suitable equalizers, delayers, reverberators, compression limiters, frequency shifters, and other equipment can be selected based on the acoustic requirements of different halls to form a normal, stable, and reliable sound reinforcement system.

4) The program source equipment includes equipment and equipment for receiving and broadcasting FM and AM broadcasts, as well as playback of records and tapes. Due to the low injection level of the program source, all devices and devices must ensure high sensitivity, high signal-to-noise ratio, low distortion, and good reliability. 5) The selection of microphone is the first level "entrance" of the sound reinforcement system. The natural sound source signal is converted into the voltage of the residence through the microphone/electricity, processed and amplified by the two poles of the mixer and power amplifier, and fed to the speaker system, with an amplification factor of tens of thousands. The quality of sound transmission directly affects the quality of the system; The characteristics of the microphone directly affect the pickup and playback performance of the system; The correct placement of the microphone directly affects the transmission gain of the system; The signal feedback of the microphone directly affects the signal-to-noise ratio of the system. The correct use of microphones is one of the key factors for the entire audio system to be in good working condition. The selection of microphone must correspond to its acoustic environment and sound pickup object, and should be weighed and selected based on the overall requirements of the sound reinforcement system, application situation, sound pickup source, technical characteristics of the microphone itself, and the characteristics of the hall.