2/4 Chenel stereo /mono Bridgeable High power Car Amplifaier 4 ohm Max output 900Watts 4 ohms bridge 2x450 Watts Low Pass filter 50Hz-250 Hz High Pass filter,frequency response 20hz-20Khz Signal to noise Ratio 100dB,input sensitivity 100mV-2,2V Input impedance 10K ohm Opera tiang Voltage 12 Volt Dc Fuse rating 2x25 Amper Speaker impedance @srtereo driven 4 ohm