Memphis Audio 16PRX11000 / 16-PRX11000 / 16-PRX11000 Class D Monoblock Subwoofer Amplifier 16-PRX1.1000 - Memphis Monoblock 1000W RMS 2000W Max Power Reference Amplifier RMS Power at 4-Ohms: 450W x 1 | RMS Power at 2-Ohms: 750W x 1 | RMS Power at 1-Ohm: 1000W x 1 High Current MOSFET Power Supply Efficient Aluminum Heat Sink with Top Cover  Sleek Look Dimensions (WxHxL): 7.2" x 2.2" x 13.1"