Main features: Unique equal quantity module design scheme, using one module card for every 2 channels for easy equipment maintenance. High efficiency D-class power amplifier circuit with fully balanced, low distortion, and low noise circuit design. Ultra high power frequency modulation, width modulation, and voltage stabilization switching power supply can work stably under very low 185V power supply conditions. Multiple comprehensive protection functions (startup soft start, overload, overheating, short circuit, DC output, peak voltage limit, intelligent peak shaving protection, etc.). XLR and Phoenix input ports are provided to meet different application needs