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3扩声系统电平的调节3.1扩声系统的五级放大对于一套扩声系统而言,也可与上面谈到的多级电压放大器来类比,例如图4所示的扩声系统的方框图中,将调音台比作多级电压放大器的第一级,将压缩器比作多级电压放大器的第二级,将频率均衡器比作多级电压放大器的第三级,将电子分频器比作多级电压放大器的第四级
3 PA system level adjustment 3.1 PA system of five amplification For a PA system, but also with the above mentioned multi-stage voltage amplifier to analogy, such as the sound reinforcement system shown in Figure 4 block diagram , The mixer is likened to the first stage of a multistage voltage amplifier, the compressor is compared to the second stage of a multistage voltage amplifier, the frequency equalizer is compared to the third stage of a multistage voltage amplifier, Compared to the multi-stage voltage amplifier fourth level