DB Bass Inferno BI4200 1,000W 4-Channel Class AB Amplifier: * Rated Power at 14.4V 500W x 4 at 2 ohms THD 0.05 percent * 1,000W x 2 at 4 ohms THD 0.05 percent * 250W x 4 at 4 ohms * High-efficiency MOSFET outputs * Fully variable high/low crossover built-in (12 dB) * Bridgeable stereo capability * 12 dB Bass Boost at 45Hz