Are you hearing a disturbing hum or buzz through your headphones or speakers that diminishes when you touch the amplifier? Then you have a grounding issue, and the Groundhog+ cable set from iFi Audio can help. Groundhog+ eliminates the unpleasant hum and buzz by grounding your audio system, providing more resolution, bass, and musicality to your music. Groundhog+ works excellently in combination with the AC iPurifier from iFi Audio to combat unwanted noise with double the power. The AC iPurifier frees your system from electromagnetic and high-frequency interference. Groundhog+ comes with a short banana-to-RCA cable to connect the AC iPurifier to your devices. Connect the banana plug to the AC iPurifier and the RCA plug to your amplifier. This not only restores the shielding provided by Groundhog+ but also eliminates external interference. If the hum or buzz does not decrease when touched, it indicates that there is a ground loop in your system caused by multiple ground connections. In this case, we recommend the iDefender+ from iFi Audio.