求翻译：2．由于CD 、MP3等音源本身音量过大时，会使输出的音频信号失真，音频信号再经过WM动力盒的放大，会更加失真，以致音质较差。所以建议您 可以现将CD、MP3等音源的音量调小，再将WM音量调到最大，然后再逐渐调大音源音源音量，直至最适合音量音质。是什么意思？

2. Due to CD, MP3 and other audio sources itself when the volume is too large, makes the output audio signal distortion, amplification of the audio signal through WM power cartridge, be more distortion, resulting in poor sound quality. It is recommended that you can adjust the volume of the CD, MP3 and other audio sources is small, then WM volume to maximum, and then gradually increase the sound source audio volume, until the most suitable volume for sound quality.