SPL Audio Power Amplifier GB 3000 output power stereo 8 Ohm : 2200 W + 2200 W output power stereo 4 Ohm : 3300 W + 3300 W output power stereo 2 Ohm : 4400 W + 4400 W Bridge 8 Ohm : 6600 W Bridge 4 Ohm : 8800 W frequency response : 20 Hz - 20 KHz - 1.5 dB power supply : 8500 W AC230V/50 Hz