THX认证音频产品旨在让您体验电影原汁原味的音效。在每台THX认证的AV功放上，音量旋钮上的“0”代表THX参考音量，即电影制作人和音效师在录音棚中使用的精确音量水平。

For manufacturing receivers and speakers, achieving the THX Reference Level is no simple task. It requires a tremendous amount of power to drive an audio system effortlessly without clipping or distorting. To ensure the audio products reach this peak performance THX developed a set of standards as part of its THX Dominus, THX Ultra, THX Select and Integrated System certifications.