iFi Groundhog+Does your system suffer from an irritating buzz or hum that decreases when you touch it? Its missing an earth ground. You need the Groundhog+. The touch test When you touch your device, does the hum buzz noise decrease? When you let go, does it increase again? If so, this is likely to be caused by a missing earth ground connection. This connection normally shields your system from such interference and drains away the noise. In this instance, you need