Equipment selection

1) The speaker system speaker 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 speaker to determine the power of each sound source. Analyze and control the sound field of the hall from the direction of the speaker to 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 total sound quality effect of the sound expansion system, the power amplifier must have sufficient power margin and can work stably for a long time. At the same time, the selected amplifier should have comprehensive technical measures in terms of improvement effect, reduction of distortion, short circuit and air load protection, and lowering temperature.

3) The tone and other device mixers are the core part of the entire audio system. It should have good electrical performance, stable working state, straight frequency response, and small harmonic distortion. The tuning table is very different in terms of functions, which must choose different quantities of input channels and output marshals according to the functional requirements of the entire system. In addition, according to the acoustic requirements of different halls, you can choose the appropriate balancer, delayer, reverbeat, compressed amplifier, frequency migrant and other equipment to form a normal, stable, and reliable sound -expansion sound system.

4) The source equipment of the program source equipment includes the receiving and broadcasting of frequency adjustment, the replacement, the replacement of the record and the tape, and other equipment and equipment. Due to the low injecting level of the program source, all devices and equipment must ensure high sensitivity, large signal -to -noise ratio, small distortion, and good reliability. 5) The selection of the speaker of the microphone is the first -level "entry" of the soundproof system. The natural sound source signal is voltage after the transmission of the speaker/electrical conversion, and the bipolar signal processing and amplification of the power amplifier can be feeded to the speaker system. Its amplification multiple can reach tens of thousands. The sound transmission performance is good and bad, which directly affects the quality of the system; the characteristics of the speaker itself directly affect the picker and reload effect of the system; the placement of the speaker is correct or not, which directly affects the transmission gain of the system; System signal -to -noise ratio. The correct use of the speaker is one of the key to the good working state. The selection of the speaker must correspond to its acoustic environment and pick -up objects. It is necessary to weigh the choice according to the overall requirements of the sound expansion system, application occasion, pickup sound source, the technical characteristics of the speaker itself, and the characteristics of the hall.