扩音机 meaning in Chinese

audio power amplifier

A new, unseen voice was booming through the pa system .
一个新的，看不见的声音从扩音机里嗡嗡地传来。
What are the chances that i will blow one of my stereo speakers if i turn my 200-watt amplifier up to wide open ?
如果把200瓦的扩音机开到最大，立体声喇叭烧坏的可能性有多大？
She gave up talking as she saw bette was trying to listen to the speech that was being relayed through a loud-speaker tied to one of the trees .
系在一棵树上的扩音机里传过来人家的演讲，她看见蓓蒂要听就不说话了。
Ten minutes later sutherland grabbed a microphone
十分钟后，萨瑟兰抓住扩音机话筒。
Measuring methods of car radio cassette player and audio amplifier
汽车收放扩音机测量方法

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