The JBL Club A754, four-channel amplifier offers high-performance in a compact size. The slim chassis and small footprint combine to allow fitment into more vehicles. The JBL Club A754 amp feature variable crossovers and bass boost for precise control and tuning; plus, high and low-level inputs allow integration into most car stereos. They're also compatible with several vehicle technologies, including the Harman HALOsonic system.