biconical speaker

例句：

1. 1.The biconvex speaker is designed to deliver a wide range of audio frequencies.
   双锥形扬声器设计用来提供广泛的音频频率。
2. 2.In the concert hall, the biconvex speaker is positioned at the back of the stage.
   在音乐会厅里，双锥形扬声器被放置在舞台后方。
3. 3. The biconvex speaker is an essential component in high-quality sound systems.
   双锥形扬声器是高质量音响系统的一个关键组成部分。