CA20 Output power (AC 220V / 50Hz. ±10%, All channels driven output power, THD=1%) 8Ω stereo 550W x2 800W x2 1100W x2 1300W x2 4Ω stereo 950W x2 1275W x2 1725W x2 2025W x2 2Ω stereo 1300W x2* 1700W x2* 2300W x2* 2700W x2* 8Ω bridge 1900W 2550W 3450W 4050W 4Ω bridge 2800W* 3400W* 4600W* 5400W* Other specification Frequency response 20Hz-20kHz(+/-0.5dB) THD+N <0.2% <0.1% <0.1% <0.1% S/N rate >80dB Damping factor >100 >300 >300 >300 Crosstalk Input sensitivity 0.775V/1.0V/1.4V Input impedance(bal/unbal) Voltage gain (8 ohm) 39.1dB 40.3dB 41.7dB 42.7dB Output circuitry Class AB Class H Class H Class H Dimension / Weight Product Dimension(mm) 483x432x89 483x432x133 483x432x133 483x432x133 Packaging Dimension(mm) G.W. 29kg 34kg 41kg 41kg