Technical Specifications RMS 8Ω/STEREO: 500W+500W 20Hz-20KHz 4Ω/STEREO: 800W+800W THD+N 0.1% 8Ω/BRIDGE: 1600W Frequency Response ref 1k20Hz-20KHz: ±0.2dB THD+N :< 0.1% Damping Factor : >200 SR : >20V/μs Gain RL 8Ω : 37dB Input Impedance : balance 20K / unbalance 10K Output Circuitry: Class AB AC POWER: AC 220V /50Hz±10% Amplifier and Load Protection: Soft boot ,DC ,short circuit, over load, overheat, Clipping distortion Input CONNECTORS: Female XLR Type/ Male XLR Type Output CONNECTORS: NL4 Speakon socket, Binding post Controls and LEDs—Rear Panel: Stereo, Splice, Bridging option switch, Bridging indicator, Sensitivity option switch, Grounding switch, 30Hz HI-PASS switch. Cooling mode: Stepless automatic transmission cooling fan.