Maximum low voltage signal from the source unit comes into the amplifier through a low voltage circuit which delivers minimal distortion through the amplification process Audiophile RCA connectors allow maximum signal throughput with minimum distortion and maximum external noise rejection Mono mode only Accu-Cross crossovers allow for complete control of the signal directing to all speakers. See specifications section for specific frequencies Control of amplifier output with on board electronic crossover to tailor specific frequencies to speakers and subwoofers. Check specifications for specific frequencies for this amplifier Developed over 4 decades of engineering to deliver the highest level of sound quality and power efficiency, Hifonics ALPHA Super D-Class® circuitry results in lower distortion, higher current efficiencies and while producing less heat than conventional amplifier designs