... transistor. Features are Input Gain, Ground Lift Switch to eliminatehum, Power LEDs, Channel 1 & 2 level, LED's indicator, stereo ... Harmonic Wave Distortion: 20Hz-20K Hz<0.1%8) Operation power voltage: with voltage changeover switch: 110V/230V9) Aluminum panel and ... .14) Ultra-light,ultra-low noise and ultra-efficient switch-mode power supply for noise-free audio, superior transient response and lower ...