1. When playing AUX music files or using a CD player to play music, click the MENU button on the panel until the interface displays the following English.

2. Press the previous/next song button within a few seconds to adjust the effect size. The larger the bass effect adjustment BASS+0~7 value, the stronger the bass effect.

3. After turning on the LOUD effect, the panel will display the words LOUD loud sound effect enhancement when playing music, indicating that the LOUD loud sound effect enhancement function is turned on.