Circuit Topology FULL RANGE CLASSS DRMS POWER OUTPUT 1 OHM 1000W (SUB)RMS POWER OUTPUT 2 OHM 240W X 4CH + 750WRMS POWER OUTPUT 4 OHM 125W X 4CH + 450WRMS POWER OUTPUT 4 OHM BRIDGED 400W X 2CHTOTAL HARMONIC DISTORTION <0.3%S/N RATIO REF 1W AT 4 OHM >90 dBGAIN RANGE 0.2-6VCROSSOVER RANGE 40-4KHz..