Rockford Fosgate Punch P500-1BD Class bd Mono Amplifier 1 x 200/400/500 Watts/RMS @ 4/2/1 Ohms Dimensions: 196 x 56 x 262 mm MONO AMPLIFIERS • Low-Pass 35Hz-250Hz @ 12dB/oct • Infrasonic 12dB/oct, -3dB @ 28Hz • Bass EQ 0dB to +18dB @ 45Hz • Frequency Response 20Hz-250Hz +/-1db • Top Mounted LED Indicators • All-MOSFET-Circuit, RCA pass-thru • Optional Remote Controller