术语“效率”是指扬声器系统将电能（功放的推力）转化为声音输出的能力。
The term "efficiency" refers to the ability of a speaker system to convert electrical energy (power from the amplifier) into acoustic output.
这些都是高输出，高效率的扬声器，采用乐富豪专业专利12“驱动装置和一个专门设计的高品质电动式高频驱动器(带过载保护)。”
These are high-output, high efficiency loudspeakers, featuring Wharfedale pro proprietary 12 "drive units and a purpose-built high quality Electro-Dynamic HF driver (with overload protection)."
在双15倍小组活动和双18X的小组活动的高效率超低音扬声器，具有一个450瓦，600瓦（RMS）的AB类模块的分别。
The Twin-15X Sub Active and the Twin 18X Sub Active are high efficiency powered subwoofers that features a 450 Watt and 600 Watt (RMS) class AB module respectively.
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