... outdoor power amplifier 1. Have class 3 and class 4H diagram design. 2. Low consumption,less heat. 3. Reliable quality. Professional amplifierC-series big power amplifier cover ... a sense of a strong resonance, very stable, has class 3 and class 4H diagram design,low consumption,less heat. Material are ... supplyAC220-240V,50/60HzDimensions660X590X230mmTotal31kg C-24 2-channel outdoor power amplifier