FEATURES GA series is switch mode power supply,2U rack, the weight is light. Big Power output; Its special cooling method makes the cooling speed much faster; Having high effective Class-H circuit; the perfect protecting system makes the product more stable; SMT. SPECIFICATION Model No. GA300 GA500 GA800 GA1000 Output Power (8ohm) 2x300W 2x500W 2x800W 2x1000W Output Power (4ohm) 2x450W 2x750W 2x1200W 2x1500W Output power brige(8ohm) 900W 1500W 2400W 3000W Input Impedance 20kohm Frequency Response 20Hz-20KHz +/-0.5db THD(20Hz-20KHz) Less than 0.05% Less than 0.08% Slew Rate 30V/us 30V/us 35V/us 40V/us Damping factor(8ohm,20HZ-1KHz) 400 Voltage gain(rated power at 8ohm) 36db 38.2db 40.2db 40.8db Output Circuit Class AB Class H Class H Class H Signal to noise ratio More than 90db More than 95db Cross Talk(20Hz-20KHz) More than 70db Input Sensitivity(8ohm) 0.775V/1.0V/1.4V Input impedance 20kohm Balance.10Kohm Unbalance Cooling Two speed fan,rear to front air flow Connector(Each Channel) XLR Controls Front:AC switch;Rear:Sensitivity,GND,stereo,parallel,bridge,30HZlowcut Indicator Standby,power,signal,clip,port,Bridge Amplifier portection Short circuit,thermal,overload,clip limited,DC voltage,ultrasonic and RF Power Supply 110V,220-240V at 50Hz-60Hz