Professional amplifier 1. Have class 3 and class 4H diagram design. 2. Low ... compaction of construction, limitation of parts's specification and tone, style, full of energy, a sense ... a strong resonance, very stable, has class 3 and class 4H diagram design,low consumption,less heat. ... 4VSegregation>70dBPower supplyAC220-240V,50/60HzDimensions580X580X160mmTotal19kg C-12 2-channel professional amplifier