Rockford Fosgate R250X1 250 Watt RMS Mono AmplifierFeatures Mono Subwoofer Amplifier 150 Watts RMS x 1 at 4 ohms (250 watts RMS x 1 at 2 ohms) CEA-2006 compliant Variable low-pass filter (50-250 Hz, 12 dB/octave) Variable bass boost (0-12 dB at 45 Hz)...