Datavideo DAC-80 2 Channel Audio Isolation TransformerEliminate audio noise caused by ground loops Easy to use Very low distortion and close to zero attenuation Normal voltage differences in the system grounding points between different pieces of equipment cause small AC power currents to flow in the shield of audio cables. Either of these problems will create hum in audio signals. DAC 80 breaks the interequipment ground path and greatly increases the rejection in the input circuits while remaining