Radial Ice Cube Balanced Line Isolator and Hum EliminatorThe IceCube is a balanced line level isolator designed to quickly eliminate hum and buzz from an audio system by simply inserting it into the signal path. Eliminate ground loops quickly The IceCube is an ideal problem solver for today's AV technicians and audio engineers, providing an easy way to insert an isolation transformer into the signal path to remove hum and buzz from ground loops, with a ground lift switch for additional noise reduction.