The BXX1600.4 is a 1600 watt 4 channel amplifier featuring Super A/B Class technology to provide the perfect sound quality design. The T3 (twin turbo toroid) power supply torroids in a Pulse Width Modulated MOSFET power supply assures the car voltage is maximized from battery to Ultra-Fi output devices. The rock solid Ultra-Fi MOSFET outputs, selected for both balance and output power, keep the power smooth even during demanding peak in the music. Low Noise Pre-Amplifier Circuitry Maximum low voltage signal from the source unit comes into the amplifier circuit with minimal distortion RCA Inputs Nickel-plated RCA jacks create the most efficient audio connection and resist corrosion Operation Mode 4 channel operation mode allows either stereo or mono bridged operation Crossover Type Variable electronic crossovers allow for complete control of the sound Electronic Equalizer Control of amplifier output with on-board electronic crossover to tailor specific frequencies to speakers and subwoofers.