Luxurious design of case,3U alloy panel. 1 line input,1 auxiliary balance input,1 line output,10aided balance output. signal cascading next pure post amplifier. adopts imported power tube,strong output power,broad bandwidth,low noise,high fidelity,acoustic meets the standard in shows.. Humanized indicators including signal,protection,distortion,start,and power,etc. Built-in 2 levels of high pass and low pass filters.automatically delete the wave and restore the signal.comprehensive assurance of safe working .protection alarm when the devices are working properly.when the input signal is too large,overload or short circuit, the correspondent light will flash.perfect temperature protection:high speed fan with strong current,low working noise,good effect of heat dissipation ,when the temperature of the device increases,the temperature protection will start the fan automatically and the speed of the fan will change as the temperature various.3 kinds of voltage output, rated voltage output:100v.impedance:4~16Ω. Unbalance less than1.5dB.