Skar Audio SKv2-3500.1D 3800 Watt Class D MOSFET Monoblock Subwoofer Car Amplifier MOSFET Monoblock Class D Power Car Amplifier Max Power at 1 Ohm: 3,900 Watts x 1 Channel (14.4v) RMS Power at 1 Ohm: 3,500 Watts x 1 Channel (14.4v) Frequency Response: 15Hz-270 Hz Sensitivity: 95 dB