D-Force describes the latest digital technology in amplifiers by Current Audio. The D-Force amplifiers generate the equivalent analog output for speakers by using a modulated audio signal rather than the traditional digital to analog conversion. The amp is a Class D configuration (D does not stand for 'digital' but merely refers to the next letter after Class C). It does exhibit a digital-like output because the outputs are generated by turning the signal completely ON and OFF.FeaturesDual Power Mode - Input power is switchable from 110VAC to 220VAC3 Prong Plug - Grounded input power for SafetyMaster POower Switch - Rear panel switch to cut power for service or hook-upMulti-Stage Protection - Each pair of channelszones is individually protected with internal circuitry and is indicated on the front bi-color LEDs. The amp will shut down a bad zone if it senses a short or is overdriven. ONLY the channels that are affected will turn Off and indicates by the LED turning from blue to red thus pointing to the channel in distress. The remaining zones will run unaffected and continue to provide sound without shutting down all zones.