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普通的模拟功率放大器在专业扩声领域中占据主导地位的时间已经相当长了，人们已经习惯于目前笨重的功率放大器。减轻功率放大器的重量、提高功率放大器的输出功率、提高功率放大器的效率，一直都是音响制造业中普通关注的问题。解决这个问题的方法之一就是利用开关电路的原理
The time it takes for a typical analog power amplifier to dominate professional sound reinforcement has been quite long, and people are accustomed to the bulky power amps that are currently in the limelight. Reducing the weight of a power amplifier, increasing the output power of a power amplifier, and increasing the efficiency of a power amplifier have all been common concerns in the audio manufacturing industry. One of the ways to solve this problem is to use the principle of the switching circuit