Features â—¦ 4 Channel Full Range Class D Circuitryâ—¦ ACT - Adaptive Crossover Technologyâ—¦ Direct Connect Speaker Terminalsâ—¦ Large Gauge Power Wire Inputsâ—¦ APC - Audio Protection Circuitâ—¦ SESI - Signal evaluation status indicator Specifications @ 14.4 Volts - 1% THD 4 x 300 Watts @ 4 Ohm 4 x 500 Watts @ 2 Ohm 2 x 600 Watts @ 4 Ohm (Bridged) Working Voltage: 10 - 16 Volts Frequency Response: 10Hz - 20KHz Signal to Noise Ratio: < 95dB Damping Factor @ 4 Ohm > 114/1KHz Low Level Input: 6V - 0.2V Ch 1/