The optimal configuration is a grounding for the entire system. When a system has multiple ground connections, unwanted ground loops often occur. These systems then produce a disturbing low-frequency hum that emanates from the speakers. The GND Defender intelligently detects a ground loop and disconnects the grounding of the affected component. This eliminates the annoying humming noise. The device's safety is not compromised; the safety ground of the device remains intact. The GND Defender is conveniently usable worldwide. Due to its small size, it takes up very little space and does not block other plugs, sockets, or cables.