口碑好的舞台音响设备，不仅具备传播距离远和高音穿透力好的特点，并且音色优美、音质音效突出，能够为观众打造一场悦耳动听、酣畅淋漓的视听盛宴，那么对于
舞台音响设备的选型您了解多少呢？
The professional stage audio equipment with good reputation not only has the characteristics of long propagation distance and good penetration of high pitched, but also has beautiful sound quality and outstanding sound effect, which can create a pleasant and enjoyable audio-visual feast for the audience. How much do you know about the selection of stage audio equipment?
音箱
loudspeaker box
音箱是整个音响系统的喉舌，因而应作为首要因素考虑。音箱选型要从音箱的灵敏度和额定功率着手，确定每个声源的功率。由音箱的指向性去分析、控制厅堂声场，确定每一个音箱位置、输入阻抗和输入功率，计算音箱与功率放大器间的匹配功率。
The speaker is the mouthpiece of the entire audio system, so it should be considered as the primary factor. The speaker selection shall 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 according to the directivity of the speakers, determine the position, input impedance and input power of each speaker, and calculate the matching power between the speaker and the power amplifier.
功率放大器
power amplifier
为了保证扩声系统总的音质效果，功率放大器要有足够的功率余量，并能长期稳定地工作。同时所选择的放大器在提率、减小失真、短路与空载保护、降低温升等方面，均应有完善的技术措施。
In order to ensure the overall sound quality effect of the sound reinforcement system, the power amplifier should have sufficient power margin and can work stably for a long time. At the same time, the selected amplifier should have perfect technical measures in improving efficiency, reducing distortion, short-circuit and no-load protection, and reducing temperature rise.
调音台与其它设备
Mixer and other equipment
调音台是整个音响系统的心脏部分。它应有良好的电气性能，稳定的工作状态，平直的频率响应，很小的谐波失真，调音台在功能方面差异很大，这就要根据整个系统的功能要求去选择不同数量的输入通道和输出编组的调音台。
The mixer is the heart of the whole audio system. It should have good electrical performance, stable working state, flat frequency response, small harmonic distortion, and great difference in function of the console. Therefore, different numbers of input channels and output marshalling consoles should be selected according to the functional requirements of the whole system.
节目源设备
Program source equipment
节目源部分包括调频调幅广播的接收与转播，唱片（含颁顿唱片）与磁带的重放等器材和设备。由于节目源部分输入电平低，因此，所有器件和设备都须保证灵敏度高，信噪比大，失真度小，可靠性好。
The program source part includes the reception and retransmission of FM and am broadcasting, and the playback of records (including CD records) and magnetic tapes. Since the input level of the program source is low, all devices and equipment must ensure high sensitivity, high signal-to-noise ratio, low distortion and good reliability.
传声器的选用
Selection of microphone
传声器是扩声系统的级&濒诲辩耻辞;入口&谤诲辩耻辞;，自然声源信号经过传声器声--电转换后的输出电压，经调音台与功率放大器两级信号处理与放大，馈给音箱系统，其放大倍数可达数万。
The microphone is the first level "entrance" of the sound reinforcement system. The output voltage of the natural sound source signal after the acoustic electrical conversion of the microphone is processed and amplified by the mixer and the power amplifier, and fed to the speaker system. The amplification factor can reach tens of thousands.
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