The LLS8 Line Level Shifter' is designed to increase or decrease signal voltage (-10dBV and +4dBu) without adding noise. The Line Level Shifter' also converts back and forth between balanced (+4dBu) and unbalanced (-10dBV) signals automatically. The Line Level Shifter' also contains Ebtechs Hum Eliminator' technology to break ground loops that cause AC hum.