Class AB; 2ohm stereo & 4ohm bridged full-range operation; Military-grade PCB with PWM MOSFET power supply; Direct short, thermal & overload circuit protection; High/speaker-level & low-level/RCA inputs; 200mV-6V low-level RCA inputs; 4-gauge power wire & 8-gauge speaker wire outputs; Variable 12dB high- & low-pass crossovers; 12dB bass boost increases low-octave harmonics; 4 channels; 1,000W max; 65W RMS x 4 @ 4ohm ; 125W RMS x 4 @ 2ohm ; 250W RMS x 2 @ 4ohm bridged; Dim: 2.25H x 10.25W x 9D;