Features â—¦ ACT - Adaptive Crossover Technologyâ—¦ High Efficiency Full Range Class D 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 1 x 1500 Watts @ 1 Ohm 1 x 750 Watts @ 2 Ohm 1 x 325 Watts @ 4 Ohm Working Voltage: 10 - 16 Volts Frequency Response: 10Hz - 20KHz Signal to Noise Ratio: < 95dB Damping Factor @ 4 Ohm > 91/1 KHz Low Level Input: 6V - 0.2V High Pa