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前文讲到,当选购谐振频率fs在20～30Hz、总品质因数Q_(TS)在0.35～0.55范围内的大口径低音单元时,按本文介绍的方法计算,就可得到一个重放下限频率(-3dB)在30～45Hz、箱体谐振频率fc在0.70～1.10范围内的密闭箱。如果把它通过一个≥50W的普通功放接到AV功放的超低音(Sub)输出端子上,就可明显地改善低音的重放效果。也许有的读者会问,现在不少家庭影院所配用的中型座地式主声箱的重放下限频率往往也可达到30～45Hz左右,再加上这个超低
The preamble mentioned above, when the purchase of the resonant frequency fs in the 20 ~ 30Hz, the total quality factor Q_ (TS) in the range of 0.35 ~ 0.55 bass unit, according to the method described in this article, you can get a playback lower limit frequency (-3dB) at 30 ~ 45Hz, the box resonant frequency fc in the range of 0.70 ~ 1.10 sealed box. If it is connected to the subwoofer (Sub) output terminal of an AV amplifier through a normal 50W amplifier, the bass playback will be significantly improved. Some readers may ask, and now many home theater equipped with medium-sized floor-based main speakers of the lower limit of the playback frequency can often reach about 30 ~ 45Hz, coupled with the ultra-low