Technical Specifications RMS 8Ω/STEREO: 1300W+1300W 20Hz-20KHz 4Ω/STEREO: 1900W+1900W THD+N 0.1% 8Ω/BRIDGE: 3800W Frequency Response ref 1k20Hz-20KHz: ±0.2dB THD+N: < 0.1% SNR: 102dB Damping Factor: >200 SR: >20V/μs Gain RL 8Ω: 42dB Input Impedance: balance 20K / unbalance 10K Output Circuitry: 3-tier Class H AC Power: AC220V / 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.