乐富豪的MX系列无源低音炮非常适合加入大量低端的MX系列双向扬声器-或任何现有的扩展低频响应需要健全的制度。

Wharfedale's MX Series passive subwoofers are ideal for adding massive low end to the MX Series two-way loudspeakers - or any existing sound system in need of extended low frequency response.

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但是，如果目标是精确的重放声音的话，一个扬声器必须是声学上的点声源(单极点，全向响应)，或者是一个声学上小的双向源(偶极)。

But if the goal is to reproduce sounds accurately, then a speaker must be either an acoustic point source (monopole, omni-directional) or an acoustically small bi-directional source (dipole).

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这个应用程序还支持双向音频，让您可以使用移动设备来听取您的宝宝住摄像头的音频，或广播音频到相机的内置扬声器。

This app also supports two-way audio, so you can use your mobile device to listen to live audio from your baby camera, or broadcast audio to the camera's built-in speaker.

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