Rockford Fosgate Prime R150X2 R150 150 Watt RMS 2-Channel Car Amplifier+Amp Kit High Level Input (4-pin). Real time output and power supply thermal sensing Rated Power (RMS Continuous Power): 50 Watts x 2 @ 4-Ohm, 75 Watts x 2 @ 2-Ohm, 150 Watts x 1 @ 4-Ohm Bridged Cast aluminum heatsink. 4 Gauge power/ground connectors Over current protection. Short circuit protection Dynamic Power (PVC/PowerCube): 61 Watts x 2 @ 4-Ohms 0 Res. 94 Watts x 2 @ 2-Ohms 0 Res On-board Punch EQ with +18dB boost @ 45Hz. RCA pass-thru outputs High Level Input (4-pin). Real time output and power supply thermal sensing