Hifonics ZXi 3406 4-Channel 300-Watt A/B-Class Zeus Amplifier RMS @ 4-Ohms: 4 x 35-Watts RMS @ 2-Ohms: 4 x 75-Watts RMS @ 4-Ohms: 2 x 150-Watts Crossover and Switching: Variable 12dB Octave Hi-Pass Variable 24dB Octave Low-Pass 18dB Bass Boost at 45Hz Inputs and Diagnostics: Variable Input Level Control Power and Diagnostics LEDs DC Short Circuit Protection Over-Load Protection Connector Types: Unbalanced Inputs (RCAs) Full-Range Line Outputs (RCAs) Molded 4-Gauge Power Inputs Molded 10-Gauge Speaker Outputs