Increase or decrease signal voltage (-10dBV and +4dBu) without adding noise. Use any combination of 1/4 inch. and XLR ins/outs. Eliminates ground loop hum. Converts balanced and unbalanced signals. 2 channel box version. Cold-rolled steel housing, passive design (no power required) & two-year warranty. Features include: · Increase or decrease signal voltage (-10dBV and +4dBu) without adding noise · Also contains Hum Eliminator technology to get rid of hum caused by ground loops or unbalanced cables · Also converts balanced and unbalanced signals · 1/4 inch. 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