Kicker DXA 500 Watt Monoblock Class D Subwoofer Car Audio Amplifier | 43DXA5001 Kicker 43DXA5001 D-Series 500 Watt RMS Mono Class D Car Amplifier Amp DXA500.1 Frequency Response: 25-200 Hz Signal-to-Noise Ratio: &gt;95 dB, A-weighted, re: rated power Electronic Crossover: Variable Lo-pass 50Hz200Hz, 12dB/octave KickEQ Bass Boost: Variable 012dB @ 40Hz