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模拟磁带录音机录音质量在很大程度上取决于偏磁、均衡和电平的调整。偏磁主要影响高频频响、饱和磁平、谐波失真,对信噪比也有一定影响。均衡则主要影响整机频率特性。电平对信噪比,上动态余量有较大影响。录音机在使用前,其偏磁、均衡,电平的状态必须适合所用磁带。当换用另一种不同型号磁带时,就必须重调。调整的过程是很麻烦的。如果只固定一种偏磁、均衡、电平,那么磁带的其它性能便不能充分发挥。尤其对于盒式录音座,由于带速低、磁迹窄、余量较小、偏磁、均衡对录音效果影响很大,而盒式磁带型号繁多,性能各异,如果每用一种磁带都重调一次,极不方便。
Analog tape recorder recording quality depends largely on bias, balance and level adjustment. Bias mainly affect the high frequency response, saturation magnetic flat, harmonic distortion, the signal to noise ratio also have a certain impact. Equilibrium mainly affects the frequency characteristics of the whole machine. The level of signal to noise ratio, the dynamic headroom has a greater impact. Before using the recorder, its magnetic bias, the level of the state must be suitable for the tape. When the switch to another different type of tape, it must be re-adjusted. Adjustment process is very troublesome. If only a fixed magnetic bias, balanced, level, then the tape’s other properties will not be able to give full play. Especially for the cassette deck, due to low speed, narrow track, smaller margin, bias, the balance of the recording effect, while the variety of tape cassettes, performance, if you use a tape Again, very inconvenient.