Features and Functions： 1. Industrial shape aluminum panel, professional design strong and durable, concave and convex appearance sense shows three-dimensional style. 2. Soft start at startup to prevent large current absorption to power grid and interference with other electrical equipment during startup. 3. Intelligent control forced heat dissipation design, low noise fan, stepless wind speed, intelligent constant temperature, high heat dissipation efficiency. 4. Four-channel power amplifier has three levels of input sensitivity selection, easily accept a wide range of signal source input. 5. Perfect and reliable safety protection measures and working condition indication (short circuit, overload, DC and overheating protection), so that users can use with confidence. 6. Intelligent peak clipping limiter, control power module and speaker system to work within the safe range. 7. Standard XLR+TRS1/4 "composite input interface, simple interface is more convenient for different user needs. 8. High quality transformer and low resistance large capacity electrolytic filter, to ensure the large dynamic work freely. 9. To meet the needs of different occasions, stereo or bridge mode can be selected. 10. Input grounding foot grounding and suspension control.