HIFONICS HFI1000.1D 1000 W Car Mono Class D Amplifier/Amp HFI10001D RMS Power @ 4 ohms475 watts x 1 channels RMS Power @ 2 ohms750 watts x 1 channels RMS Power @ 1 ohm1000 watts x 1 channels Peak Power OutputNot Specified Amplifier ClassD Number of Channels 1 - Mono Total RMS Power Output1000 watts Built-in CrossoverLow-pass (LP)Low-Pass Crossover Frequency 30 - 250 Hz Subsonic Filter15 - 35 Hz