Radial Engineering LX-3, User Manual

Radial Engineering Ltd.

LX-3™  Line Splitter User Guide

5

USIng ThE gRoUnd LIFT

When connecting two or more powered devices, you may encounter hum and buzz caused by ground loops. The isolated 

outputs on the LX-3 have a Jensen transformer in their signal path, which blocks DC voltage and breaks the ground loop. How-

ever, the direct output is connected straight through to the input of the LX-3, and you may need to engage the ground lift on this 

output to disconnect the audio ground and help remove buzz and hum on this output. Ground lift switches are also present on 

the isolated outputs to provide further abatement of ground loop noise.  

the image above shows an audio source and a destination with a common electrical ground. as the audio also has a ground, these 

combine to create a ground loop. the transformer and ground lift work together to eliminate the ground loop and potential noise.

60Hz

Hum

GROUND LOOP HUM

TRANSFORMER 

BREAKS THE LOOP

ELECTRICAL GROUND PATH

EMI & RADIO NOISE

SOURCE

RECEIVE