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Note

: The Stereo PC-Audio Balun is phase polarity sensitive.  Therefore, in order to 

achieve full stereo audio quality, please ensure that the wiring is straight-through 
and according to EIA568 (A or B) standard. 

3.

 

Verify the colors of the RCA plugs and connect one (1) Stereo PC-Audio 
Balun to the PC audio 3.5mm connector of the PC output. 

4.

 

Verify the colors of the RCA plugs and connect a compatible MuxLab Stereo 
Audio Balun (i.e. 500027) to the left-audio and right-audio RCA connectors of 
the TV or audio receiver at the remote end. 

5.

 

Complete the connection between the two (2) baluns, using standard UTP 
cable, connector blocks and appropriate modular RJ45 outlets. 

6.

 

Power-on the audio equipment and check the audio quality.   The audio should 
be clear within the maximum specified distances.  The following diagram 
shows a typical configuration using the 500030 and the 500027. 

 

 

 

 

 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

 
 

Troubleshooting 

 

The following table describes some of the symptoms, probable causes and possible solutions 
in respect to the installation of the Stereo PC-Audio Balun.   If you still cannot diagnose the 
problem, please call MuxLab Customer Technical Support at 877-689-5228 (toll-free in North 
America) or 514-905-0588 (International). 

 

Symptom 

Probable Causes 

Possible Solutions 

Poor audio 
quality 

EMI interference. 

Check that wiring is not too close to 
transformers and ballasts. 

 

Split pair 

Ensure that the UTP pairs are not 
split and that each pair of wires is 
twisted. 

No audio 

No power 

Check your audio system for power. 

 

Open circuit 

Check wiring to ensure continuity 

 

Defective balun 

Change Stereo PC-Audio Baluns for 
another pair. 

Audio phase 
cancellation 

Reversed wires 

Check for straight-through wiring. 

Audio weak 

Distance specifications 
exceeded 

Check DC loop resistance and verify 
if distance spec is exceeded. Reduce 
cable length or eliminate high-loss 
components. 

 

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