This series is Four channel class d amplifier, which consist of 4 individual amplifiers.The amplifier is designed in both tabletop and rack mount. Shinning feature of it is to adopt tech. of power saving. Switching power is also adopted so that the efficiency is up to 85%. Thermogenesis is less than 55 degree. And it could operate at severe working condition. 4 balanced line input is in type of phoenix. 4 speaker output is at 100V and with individual volume control. Indication displays signal, peak and protection. Power supply at DC 24V is also allowed. Cooling system ensure the system working under 55 degree. Complete protection is to avoid overheat, overload and short.