Legacy LA1089 4000 Watt 4 Channel Bridgeable MOSFET Amplifier Dual MOSFET Power Supplies; Dual HIGH/LOW/FULL X-over Switch; Dual Variable Hi-Pass: 40 Hz-250 Hz; Dual Variable Low-Pass: 40 Hz-250 Hz Slim Size Amplifier Design For Easy Installation; Dimensions: 10.74''W x1.69''H x17''L