在黑暗中發現了一個驚人的事情
Audio power amplifier - Wikipedia, the free encyclopedia 公路上不要玩疊羅漢拉!!!An audio power amplifier is an electronic amplifier that amplifies low-power audio signals (signals composed primarily of frequencies between 20 - 20 000 Hz, the human range of hearing) to a level suitable for driving loudspeakers. It is the final electro...
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