GOLD PROCESSADOR DE AUDIO DSP4X8 USER MANUAL 使用说明书 数字音频处理器Digital Loud Speaker Management Important safety precautions and symbolic instructions 1. Read these rules. 2. Keep this manual well. 3. Pay attention to all warnings. 4. Compliance with these provisions. 5. Soft leather and air gun can be used for cleaning. 6. Be careful not to form hot air circulation. Installation according to recommended method.