Full Range and Beyond. With the Class A dual (mirror image) input and voltage amplifier stages the T650.1 plays every frequency from 5Hz - 100kHz with 99.95% accuracy for amazingly lifelike and dynamic sound. The Class A/B current amplifier stage keeps the efficiency reasonable. At 650 Watts X 1 continuous the T650.1 is an outstanding full range power amplifier with ultra low noise and distortion for a crazy bi-amped front stage, subwoofer setups, or center channels. With its super high damping factor and large onboard power storage you can give your full range speakers everything they could ever want or control your subwoofers like never before.