1.Pro power amplifier 2.High power amplifier 3.Professional stage amplifier 4.high damping, high level of protect function CA Series ... performance efficiently. Meanwhile, it modifies the traditional switching distortion of Class H, making the sound come out more powerful and accurate ... fans,rear-to-front air flowPower Requirements110V,120V,220V,240V 50-60HzDimensions(W×H×D)650mm×585mm×200mm