Hum and other unwated noise is a common problem in sound systems, even with the volume control set at minimum level. To prevent the hum caused by ground loop, the Hum Eliminator Box is a pro quality tool that you can use. This unit also converts unbalanced signals into balanced signals.Features2-channel passive hum eliminatorstudio / DJ mixer: using more than one mixer in a studio means you might face hum noise from your line level gears. With the Hum Eliminator Box the sound will be clean.live sound: unbalanced cables are frequently used in live situations. Hum noise might be caused by such unbalanced cables, amplifiers or guitars. With the Hum Eliminator Box you can balance the signal.computer sound card: most sound cards use unbalanced in and outputs. Using the Hum Eliminator Box can help you to balance them and to prevent the ground loops by the computer's power supply.Specifications frequency response: 10Hz-50kHz, ±0.5dB @ + 4dBµ THD: 0.01% typical @ 1kHz, +18dBµ < 0.05% @ 100Hz, +24dB insertion loss: 4dB @ 100k ohms load, 5.5dB @ 600 ohms load connections: ¼" TRS balanced / unbalanced jacks dimensions: 113 x 75 x 40mm weight: 370g