Infinity's Reference 3004A Amplifier will add a lot of muscle to your music without breaking a sweat, and it'll look good doing it. This 4 channel powerhouse delivers 75 watts RMS to each of your car's front and rear speakers. In planning ahead? You can use this amp in 2-channel mode now to drive a pair of subwoofers with 200 watts RMS each, then reassign it to your front and rear speakers when you get a larger sub amp. Speaker level inputs allow this amp to work in almost any system, even if you keep your factory car radio. You can use the separate high and low pass filters on the front and rear channels to maximize the performance of your speakers or subwoofers..PZA MORE SPECS