* High efficient square transformer, imported large electrolytic capacitors margin lr energy * 4 pairs of large power TOSHIBA transistor output * 3-route microphone input, volume, tone and sound effect in push-in style adjustment * 3-route audio input, 3-route video input/output * Audio/Video input auto de tect function, input sensitivity adjustable * Built-in 24BIT digital conditioned circuit * Infrared wireless remote control. Volume reset to zero on startup * Full functional protective circuit