Designed to eliminate ground loop problems in video signals
Allen Avionics 4 Channel 75 Ohm Hum Eliminator with Sync
Allen Avionics 5 Channel 75 Ohm Hum Eliminator
Allen Avionics 50 Ohm Hum Eliminator
Allen Avionics AGL-10K Audio Ground Loop Isolation Transformer
Allen Avionics AGL-600 Audio Ground Loop Isolation Transformer