Rockford P500X1BD Punch 1-Channel BD Amplifier 150 Watts x 1 @ 4-Ohms, 300 watts x 1 @ 2-Ohms, 500 Watts x 1 @ 1-Ohms Accepts High Level & RCA Level Input Cast aluminum heatsink with Top Mount Controls 12dB/octave crossover 4 Gauge power/ground connectors