Dual DA704L 400 Peak Watt 4 Channel Low Profile Digital Amplifier 4 channel digital amplifier 400 Watts Peak Power, 100 Watts x 4 RMS power @ 4 Ohms, 150 Watts x 4 RMS power @ 2 Ohms Class D Digital, full MOSFET DC-DC PWM power supply High-level inputs with auto turn-on and low-level inputs (RCA) Variable low-pass crossover and variable bass boost