Eliminates ground loop hum. Just plug the HE-2 in between the offending pieces of equipment and you're done. Also converts balanced and unbalanced signals. 2 channel box version. Cold-rolled steel housing, passive design (no power required) & two-year warranty. Features include: • Simply plug the Hum Eliminator between the offending pieces of equipment to get rid of ground loop or cable related hum • Uses 1:1 isolation transformers to break loop antenna and balance audio lines • Also converts balanced and unbalanced signals • 1/4? smart jacks can accept any combination of mono or stereo plugs • Available in 2 channel box or 8 channel single space rack • Passive device (No power required) • Hang-able/resealable clear clamshell packaging • Cold-rolled steel housing, two-year warranty