Power Acoustik 4DS.400 is a high-fidelity 4-channel power amplifier with a diagnostic panel that provides real-time information about the amplifier's status, including power output, clipping, and thermal conditions. It features an electronic crossover with variable sub control, allowing you to customize the sound output to your specific preferences. With 400 watts of power, the 4DS.400 can drive even the most demanding speakers with ease, delivering crystal-clear audio reproduction.