Main Feature: 1. Brushed aluminum front panel with unique streamline design. 2. Perfect dynamic, comprehensive current limit, overload and chopped protection. 3. Intelligent-controlling fan for radiating. 4. Perfectly combine H technology and topology. 5. AI insert and SMT automatical technique for strict control the consistency of the products. 6. Adopt A class standard steel disc and fine copper high-powered toroidal transformer to achieve driving bass, mellow alto and clear treble. 7. Adopt original high-powered enthusiast Toshiba audio tube. 8. With USA branded twin tube, circuits is optimized to perfection. 9. Suitable for large stage performances, KTV room, pubs and conference rooms etc. Technical Specifications: RNS 8O/STEREO:1400W+1400W 20Hz-20KHz 4O/STEREO:2000W+2000W THD+N 0.1% 8O/BRIDGE:4000W Frequency Response 20Hz-20KHz: ±0.5dB THD+N: < 0.1% SNR: 100dB Damping Factor: >200 SR: >20V/µs Gain RL 8O: 43dB 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, overload, 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. Packaging Info.: Net Weight: 37.85kg Gross Weight: 40.6kg Quantity/ Carton: 1pcs Packaging Details: Carton with plastic bag inside Packaging Size: 680 (L)×595 (W)×200 (H)mm