Pioneer GM-D9704 1600W Class FD 4-Channel Bridgeable Car Amplifier. This compact Class-D amplifier offers a 1-Ohm stable circuit, installation flexibility, and superior high-power output. It features a Speaker Line Input Sensor to connect to your existing OEM unit without extra adapters and a Variable LPF to adjust low-pass filter frequency for greater audio control. Power specifications include: 4 x 130W RMS (4Ω), 4 x 200W RMS (2Ω), with a combined Max power of 1600W. Dimensions are 302 x 215 x 60 mm.