... used overvoltage and undervoltage protection, power supply over-current protection, temperature protection, limiting voltage protection, which provide a safe power supply ... S/n ratio( signal to noise ratio). F, Calm Audio digital power amplifier process superb technology, Lightweight body and the unique ... ,Aweight >108dbNet weigh8.3kg8.3kg8.9kg8.9kg9.6kg10kg10kg 1 U Digital Amplifier