Want an amplifier that is built to last? Go for Diamond Audio D300.2 300 Watt 2 Channels Amplifier. The Diamond D300.2 2-channel amplifier sends 100 watts RMS of clean, pure music to a pair of full-range speakers or a set of components, with no audible colouration or distortion. You can also set it into single-channel, bridged mode to run a subwoofer with 300 watts RMS of killer bass. The focussed mass heatsink draws heat away efficiently by attaching 75% of its mass directly to the components that create the most heat. The amplifier's output transistors also mount to the heatsink using a special system that provides better heat flow than commonly used clips. The D300.2 features high and low pass filters and a bass boost, so you can tune it for a wide variety of specific speaker and sub systems. A pair of preamp outputs makes it easier to add a sub amplifier when you want, without having to run a new RCA cable to the receiver. And you'll also find speaker-level inputs for hooking the amp to a factory stereo that doesn't have RCA outputs.