The subwoofer is a bass reflex loaded design, with a side mounted port.

低音炮是反射式倒相设计，有一个安装在侧面的倒相管。

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This is a powerful bass reflex subwoofer that gives you the lowest frequencies and the punch you need.

这是一个强大的低音反射低音炮，让你的最低频率和力度需要。

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The SI-18BX is a straight forward, no nonsense 18-inch bass reflex subwoofer with exceptional low frequency response.

在许仕18 BX是一个简单的，没有废话18英寸低音出色的低反射低音频率响应。

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The compact wireless subwoofer, which can be placed anywhere in the room, features a down-firing bass reflex design for accurate bass and a more realistic sound.

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The bass reflex port is optimally positioned to ensure the twin woofers drive accurately and with synchronous timing, controlling back radiation and to help eliminate sound distortion.

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This system lets you stream and control music from your smartphone or tablet, comes with dual drivers and a bass reflex system, and delivers 16 powerful watts of sound.

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