introduce:
 Output channels: two channels (left, right)
 Output power: 330w x2 (8 ohms), 450Wx2 (4 ohms)
 Size: H89,W482,D315mm
 Weight: 12.7kg
 Specifications:
 Frequency Response:20 Hz - 20 kHz, +0/-1 dB (at 1 watt)
 THD: <0.5%, 20 Hz - 20 kHz
 Intermodulation Distortion: =/ <0.35% (60 Hz and 7 kHz at 4:1 from full rated output to -30 dB)
 Slew Rate:>10V/us
 Voltage Gain: 31 dB
 Damping Factor:(8 ohms, 10 Hz to 400 Hz) >200
 Signal To Noise Ratio (A-weighted):>100 dB
 Crosstalk (below rated power) 20 Hz to 1 kHz: -75 dB, -59 dB
 Input Sensitivity: (for full rated power at 8 ohms) 0.775V or 1.4V
 Input Impedance (nominal balanced, unbalanced): 20kΩ, 10kΩ
 AC: 120V~60 Hz; 220V~50/60 Hz; 230-240V~50/60 Hz