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The Kicker KEY500.1 amplifier is a great choice to add a lot of power to your cars subwoofer system in a small package. The KEY500.1 uses powerful digital signal processing to get the best sonic qualities out of your install. Kickers KEY amplifiers include automatic EQ adjustment at the press of a button through huge 40-band equalizer which improves tonality and a 24dB crossover that re-defines the capabilities of your subwoofer. The KEY500.1 is a great addition to a stock stereo in need of a little more low-end. The KEY500.1 delivers up to 500 watts of total power to your subwoofer in a tiny easy-to-hide package. At less than eight inches long and two inches high this can be hidden behind the radio under a seat or in the trunk with ease. Kickers KEY amplifiers are designed to be compatible with newer vehicles that incorporate start-stop systems and Kickers dynamic power management system applies limiting/compression to peaks of music when the amplifier reaches a temperature threshold in order to cool itself down and not interrupt the music!