The best possible configuration for any audio system is to have single ground/earth but unfortunately, that's not the case with all audio systems. The use of multiple Grounds/Earths leads to unwanted ground loops which ultimately generates low-frequency hum. There are other solutions available in the market to deal with this but they often end up putting the EMI shielding at risk but that's not the case with the iFi Audio GND Defender. This smart device intelligently detects the ground loop and eliminates it to ensure nothing interferes with your music listening experience.