Alpine amplifiers, made with the car audio enthusiast and installer in mind these amplifiers will go in easy, and provide tons of clean power.  Alpine makes amps for every situation including: Class D / Mono, 2-Channel, 4-Channel, and Hybrid amplifiers they are sure to have something that will work perfectly with your system.  New for 2008 the Alpine PDX series amplifiers provide huge amounts of power in a small package.  These amplifiers are great for speakers and subwoofers alike, stacking a mono and 4-channel speaker amplifier will save you space, but it also looks cool.  Every PDX amp also features quick disconnect plugs making installations a breeze.