Maximum 640-Watt Power Output Continuous 320-Watt Average Power Output (80W x 4 Into 4 Ohms, 20Hz-20kHz @.05%THD) Typical 2-Ohm Stereo 115W x 4 @ 0.2% THD Bass Extender Control 0-15dB @ 45 kHz Adjustable 55Hz-550Hz, 12dB/oct. High- / Low- Pass Crossover Mixed-Mode Operation 4- / 3- / 2-Channel Operation MOSFET Output Design Speaker Level Inputs Double-Sided FR4 PC Board