The OCL power amplifier is a power amplifier with no output coupling capacitor. The output stage and the speaker are directly coupled. Overcoming the disadvantages of the OTL power amplifier is the improvement of the OTL power amplifier. The low-end frequency response of the output signal is greatly improved. This circuit uses a positive and negative polarity power supply in order to obtain a DC zero level. Since the circuit is directly coupled, the input circuit uses a differential circuit in order to reduce the zero point drift. However, this kind of amplifier must pay full attention to the protection of the speaker when it is used. Otherwise, the speaker is easier to burn. In addition, it requires a very high stability of the circuit. Therefore, the performance indicators of the components must be ensured to be good. Such a power amplifier is generally used. In the sound quality requirements and applications.
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