Class D amp; Compact 4.75″ chassis design for installation versatility; Splash-resistant conformal-coated circuit boards; MOSFET power supply with audiophile-grade IRTM transistors; Military-grade SMT PCB maintains dynamic performance; 2ohm stereo & 4ohm bridged full-range operation; Direct short, thermal & overload circuits; 200mV-6V low-level RCA inputs; High-level input with auto turn on when senses signal ; Variable 12dB high-pass & low-pass crossovers; 10Hz-50Hz variable 12dB subsonic crossover protects subwoofers; Dim: 1.63″H x 12.25″W x 4.75″D; 4 channels; 3,000W max ; 285W RMS x 4 @ 4ohm ; 375W RMS x 4 @ 2ohm ; 750W RMS x 2 @ 4ohm bridged;