密闭箱和宽带单反射带通是效率最差的设计。
The sealed enclosure and the wide-bandwidth single-reflex bandpass are the least efficient designs.
接下来，宽带双反射带通和导向孔箱体也有很好的效率。
Next in line, the wide-bandwidth dual-reflex and the ported enclosure exhibit very good efficiency as well.
导向孔和双反射带通箱设计比密闭箱的失真更小一些，但是差别不大。
The ported box and the bandpass designs produce less distortion than the sealed box, but the difference is marginal.
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