Type/ Model : KPT412 Stereo Power         8 Ω : 1250 Watt X 4 1kHz 0,1% THD     4 Ω : 2100 watt X 4                                2 Ω   2200 watt X 4 Bridge Mono          8 Ω : 4200 watt X 2 1kHz 0,1% THD    4 Ω : 4600 watt X 2 Signal to noise : 112 dBA Cooling : 2 fans front –rear air flow Frequency Response : +/-0,5dB 23Hz – 56kHz THD : ≤0,01% Rated @8 Ω 1 kHz IMD : ≤0,01% Rated power @8 Ω Input Sensitivity : 0,7V, 0,1V, 1,4 V Input Impedance : 20k Ohm Main power supply : 230V AC