Muxlab Stereo Audio Balun User Manual
Specifications
Environment Line level unbalanced analogue audio
Devices DVD, VCR, camcorders, audio mixers, audio matrix switchers,
audio splitters, audio distribution amplifiers, boosters, satellite
receivers, MPEG players, laptops, stereo audio amplifiers, audio
switchers, integrated TV monitors and other line level audio
equipment
Transmission Transparent to the user.
Bandwidth (3dB point)
(400 O source & 50 kO
receiver)
Maximum Input Level 1.1Vp-p
Insertion Loss per Balun
Pair
Common Mode Rejection
(CMMR)
Audio Source Impedance Less than 600 ohms
Audio Receiver Impedance 10 k ohms or greater
Impedance Transformation
Ratio
Cable – UTP
Max. Distance – Cat 5 UTP 5,000 ft (1,525m)
Connectors Two (2) RCA-M 6” cable leads
Pin Configuration (RJ45) Audio 1 (White): pins 1[R] & 2 [T]
Temperature Operating: 0º to 55º C. Storage:-20º to 85º C. Humidity: up to
Enclosure ABS. Fire retardant plastic
Dimensions 1.875” x 1.0” diameter plus 6” audio lead
Weight 1.0 oz (28 gms).
Warranty Lifetime
Order Information 500027 Stereo Audio Balun
Up to 1,000 ft (305m): 60Hz - 20 kHz
1,000 ft (305m) to 5,000 ft (1.5 km): 100Hz - 20 kHz
Less than 1 dB per pair over the frequency range
Greater than 60 dB @ 1 kHz
Single unit: 4:1 (source: line)
24 gauge or lower solid copper twisted pair wire impedance: 100
ohms at 1 MHz. Maximum capacitance: 20 pf/foot.
Attenuation: 6.6 dB/1000 ft at 1 MHz
One (1) RJ45
Audio 2 (Red): pins 3 [R] & 6 [T]
95%
Stereo Audio Balun (500027)
Quick Installation Guide
Introduction
The VideoEase Stereo Audio Balun (500027) allows unbalanced line level stereo audio to
be transmitted up to 5,000 ft (1.5km) via unshielded copper twisted pair (UTP) in a
point-to-point connection. The product is designed for mid-range audio applications.
Used in pairs, the Stereo Audio Balun eliminates costly and bulky audio cable, allowing
audio equipment to be connected or moved within a structured cabling environment. The
500027 also works in conjunction with other MuxLab audio-video products including the
500200, 500012, 500001 and 500019 for a more complete cabling solution. Applications
include; audio distribution, custom residential systems and intercom systems.
Installation
To install the Stereo Audio Baluns, perform the following steps:
1. One pair of Stereo Audio Baluns is required for each stereo channel.
2. Identify the pin configuration of the baluns. Two (2) twisted pairs are required
as shown in the following diagram.
8114 Trans Canada Hwy, St. Laurent, Quebec, Canada, H4S 1M 5
Tel.: (514) 905-0588 Fax: (514) 905-0589
Toll Free (North America): (877) 689-5228
E-mail: videoease@muxlab.com URL: www.muxlab.com
94-000555-A SE -000583-A
© MuxLab Inc.
Note: The Stereo 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 Audio Balun to
the left-audio and right-audio RCA connectors of the audio source.
4. Verify the colors of the RCA plugs and connect a second Stereo Audio Balun to
the left-audio and right-audio RCA connectors of the 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.
Troubleshooting
The following table describes some of the symptoms, probable causes and possible solutions
in respect to the installation of the Stereo 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
Split pair Ensure that the UTP pairs are not
No audio No power Check your audio system for power.
Open circuit Check wiring to ensure continuity
Defective balun Change Stereo Audio Baluns for
Audio phase
cancellation
Audio weak Distance specifications
EMI interference. Check that wiring is not too close to
transformers and ballasts.
split and that each pair of wires is
twisted.
another pair.
Reversed wires Check for straight-through wiring.
Check DC loop resistance and verify
exceeded
if distance spec is exceeded. Reduce
cable length or eliminate high-loss
components.
© MuxLab Inc.
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