低音炮是反射式倒相设计，有一个安装在侧面的倒相管。
The subwoofer is a bass reflex loaded design, with a side mounted port.
分析了在开口箱中倒相管的作用，并且介绍了开口箱品质因数QTSB的调整。
The phase-inverted tube in the vented-box and the adjustment of quality factor QTSB are introduced.
分析了在开口箱中倒相管的作用，并且介绍了开口箱品质因数QTSB的调整。
The phase-inverted tube in the vented-box and the adjustment of quality factor QTSB are introduced.
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