Lanzar OPTS650.5 Opti Scion 640 Watt 5 Channel Competition Amplifier 2 x 150W RMS at 4 OHMS 2 x 240W RMS at 2 OHMS 1 x 380W MAX at 2 OHMS BRIDGED Frequency Response - 10Hz-35kHz Input Sensitivity (High Level) - 50Hz-500Hz