For optimal results, the load impedance should be at least five times higher than the output impedance. So if the microphone has an output impedance of 200 ohms, the preamp should have an input impedance of at least 1.000 ohms.
为获得最佳结果,负载阻抗应至少比输出阻抗高五倍。因此,如果麦克风的输出阻抗为 200 欧姆,则前置放大器的输入阻抗应至少为 1.000 欧姆。