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有线广播的负载配接就是指负载阻抗(如扬声器阻抗或线路的输入阻抗)和扩音机的输出阻抗的匹配。为了使扩音机正常工作,并输出最大功率,使远近扬声器响度均匀,失真减小,就必须掌握有线广播的负载匹配关系。
Cable patching of the load refers to the load impedance (such as the speaker impedance or line input impedance) and amplifier output impedance matching. In order for the megaphone to work normally and output the maximum power so as to make the loudness far and near of the loudspeaker uniform and reduce the distortion, it is necessary to grasp the load matching relationship of the cable broadcast.