VFL Audio 4 Channel Amplifier 2000 Watts Max 1000 Watts RMSVFL Audio Class A B 4 Channel Amplifier, 1000W RMS 2000W MAX 500 x 4 MAX @ 2 Ohms 250 x 4 RMS @ 4 Ohms Dim (WxHxL) 7. 875"e; x 2. 25"e; x 19. 625"e; Fuse rating: 120A external fuse required (not included) 2 Ohm Stable PCB Mounting Fan Cooling Frequency Response: 10Hz 50Hz Signal to Noise Ratio: >105dB Damping Factor: >150 Input Sensitivity: 6V 0. 2V Bass Boost: 0dB 12dB Low Pass Filter: 35Hz 250Hz High Pass Filter: 20Hz 5KHz Efficiency @ 4 Ohms: >70%