Radial Engineering R800 1031 IceCube Line IsolatorEliminate Ground Loop Hum with the Radial IceCube IC 1 Line Isolator The Radial IceCube IC 1 is a balanced line level isolator designed to eliminate ground loop hum and buzz in your audio system. Simply plug it in between two line level devices for a clean and noise free audio experience. Key Features: Balanced Unbalanced: Designed to Handle Balanced and Unbalanced Audio Signals at Any Volume Level Connectors: XLR input and output Ground Lift: Ground