NVX Professional Grade True 750-watt Monoblock Class D B.O.O.S.T Series Amplifier [BDA7501] Wide Frequency Response Range 20-500 Hz provides control over the subwoofer and desired frequency Class D circuitry makes the most out of the limited power of your cars electrical system Sleek, compact amplifier features high quality components designed for efficient output without sacrificing any power RMS power rating: 4 ohms: 450 watts x 1 chan | 2 ohms: 750 watts x 1 chan High quality platinum finish connections provide solid electrical connection and resist corrosion