对于音频放大，一个A类放大器可单端或推挽。

For audio amplification, a class a amplifier can be either single-ended or push-pull.

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的主要缺点推挽放大了A类单端A类，是有必要的一个阶段分流阶段产生相反相驱动信号。

The main disadvantage of push-pull class A amplification over single-ended class A, is the necessity for a phase splitter stage to generate the oppositely-phased drive signals.

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