The new Infinity Reference amplifiers deliver raw power from a slim, compact chassis that's designed to fit in more vehicles. Available in 4-channel, 5-channel, and mono models, the Reference amps incorporate our latest amplifier topology, include variable electronic crossovers and bass boost control for precise system tuning, and feature high and low inputs level for easy interface with virtually any system. They are also compatible with several new vehicle technologies, including many advanced driver assistance systems, and Harman HALOsonic, a suite of acoustic solutions that can simulate engine sounds for a better driving experience in hybrid and electric cars, cancel noise. off the road for better-sounding music, and more..PZA MORE SPECS