Circuit Topology FULL RANGE CLASSS DRMS POWER OUTPUT 1 OHM N/ARMS POWER OUTPUT 2 OHM 225Wx6CHRMS POWER OUTPUT 4 OHM 150Wx6CHRMS POWER OUTPUT 4 OHM BRIDGED 450W X 3CHTOTAL HARMONIC DISTORTION <0.3%S/N RATIO REF 1W AT 4 OHM >90 dBGAIN RANGE 0.2-6VCROSSOVER RANGE 40-4KHzFREQUENCY RANGE 20-20KHZ..