... used the advanced PWM (pulse width modulation)technology, amplifier operating efficiencies is up to 95%, only about ... lower static-load operating current, the efficiency of power amplifier has been greatly enhanced. E, Quite quiet, zero ... to noise ratio). F, Calm Audio digital power amplifier process superb technology, Lightweight body and the unique ... .3kg8.9kg8.9kg9.6kg10kg10kg Digital Amplifier-1000W