Skar Audio SKv2-2500.1D 2900 Watt Class D Mosfet Monoblock Subwoofer Car Amplifier Mosfet monoblock class d power car amplifier RMS power at 1 ohm: 2900 watts x 1 channel (14.4V) RMS power at 2 ohm : 1450 watts x 1 channel (14.4V) Frequency response : 15hz-270 HZ Sensitivity: 95 db.