MuxLab Stereo Hi-Fi Balun User manual

8495 Dalton Road, Mount Royal, Quebec, Canada. H4T 1V5
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E-mail: [email protected] URL: www.muxlab.com
© MuxLab Inc. 94-000556-B SE-000589-B
Specifications
Environment Line level unbalanced analogue audio
Devices DVD players, satellite receivers, MPEG players, laptops, hi-
fidelity stereo audio amplifiers, audio switchers, AV
monitors and other line level audio equipment.
Transmission Transparent to the user
3 dB Bandwidth 20 Hz to 20 kHz over the distance range
Maximum Input 1.1 Vp-p
Insertion Loss per Balun Pair Less than 2 dB over the frequency range
Common Mode Rejection Ratio
(CMRR) Greater than 60 dB at 1 kHz
Greater than 40 dB over the frequency range
THD Less than 0.007% at 1 kHz
Audio Source Impedance 100 ohm maximum
Audio Receiver Impedance 10 kohm minimum
Max. Distance via
Cat 5E/6 UTP/STP Cable 3,250 ft (1 km)
Pin Configuration (RJ45) Audio 1 (White): Pins 1(R) & 2(T)
Audio 2 (Red): Pins 3(R) & 6()
Cable:
Cat 5E/6 UTP/STP 24 AWG or lower solid copper twisted pair wire
Impedance: 100 ohm at 1 MHz
Maximum capacitance: 20 pf/ft
Attenuation: 6.6 dB/1,000 ft at 1 MHz
Cable: Coax Shielded audio cable
Connectors Two (2) RCA-M 6” cable leads
One (1) RJ45
Temperature Operating: 0º to 55ºC
Storage: -20º to 85ºC
Humidity: Up to 95% non-condensing
Enclosure ABS. Fire retardant plastic
Dimensions 2.40” x 2.25” x 1.00” plus 6” audio lead
Weight 3.1 oz (89 g)
Warranty Lifetime
Order Information 500028 Stereo Hi-Fi Balun
Stereo Hi-Fi Balun
500028
Quick Installation Guide
Overview
The Stereo Hi-Fi Balun (500028) allows unbalanced line level stereo audio to be
transmitted up to 5,000 ft (1.5 km) via an unshielded copper twisted pair (UTP) cable in
a point-to-point connection. Used in pairs, the product is designed for high fidelity
applications where full audio bandwidth (20 Hz to 20 kHz) is required. Used in pairs,
the Stereo Hi-Fi Balun eliminates costly and bulky audio cables, allowing audio
equipment to be connected or moved within a structured cabling environment.
Applications include: Audio distribution, high-fidelity sound systems, and custom
residential audio systems.

© MuxLab Inc.
Installation
To install the Stereo Hi-Fi Baluns, perform the following steps:
1. One pair of Stereo Hi-Fi 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.
Note: The Stereo Hi-Fi 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 Hi-Fi 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 Hi-Fi 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 Hi-Fi Balun:
Symptom Probable Cause Possible Solutions
EMI interference Check that wiring is not too close to
transformers and ballasts.
Poor audio quality Split pair Ensure that the UTP pairs are not split and
that each pair of wires is twisted.
No power Check your audio system for power.
Open circuit Check wiring to ensure continuity
No audio Defective balun Change Stereo Hi-Fi 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.
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).