Technical Specifications RMS 8Ω/STEREO: 1200W+1200W 20Hz-20KHz 4Ω/STEREO: 1800W+1800W THD+N 0.1% 8Ω/BRIDGE: 3600W 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 OUUPUT CIRCUITRY: 2-tier Class H AC POWER: AC 220V 50-60Hz (±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- FRONT PANEL: Peak clipping, Signal, A&B Volume potentiometers, DC, Protection indicator 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.