SCV-4000D - Sundown Audio Monoblock 4000W RMS Amplifier Input Sensitivity ( =/- 5% ): 6 - 0.2 Volts RMS Power - 1 ohm Mono: 4000W RMS Power - 2 ohm Mono: 2000W RMS Power - 4 ohm Mono: 1000W Low Pass Frequency Crossover: 35 Hz - 300 Hz