Class D; Mono subwoofer amp; Variable input voltage; QTD (Quick Thermal Dispersion) technology heat sink; Low-noise preamp; Low-level RCA inputs & outputs; Built-in variable electronic crossover (HP & LP); Onboard bass boost; 2,000W max; 500W RMS x 1 @ 4ohm ; 1,000W RMS x 1 @ 2ohm ; 2,000W x 1 @ 1ohm D Class; Dim: 3.7″H x 13.3″W x 10.8″D;