ARX DeBalancer User Manual

Specifications

ISO De-Balancer

Input Impedance 10K Ohms Balanced
Output Impedance 10K Ohms Unbalanced
Input Level (max) +12dB
Frequency Response 20Hz - 20 KHz ± 0.5dB
THD at Max Output 0.2% 30 Hz - 20KHz
Insertion Loss 0.75dB @ 1 KHz (600 Ohm source)
Input Connector 3 pin female XLR, wired Pin 1 Ground, Pin 2 +

Hot, Pin 3 - Cold. Chassis Ground is connected
to the RCA Output connector shield/ground

Output Connectors Dual stereo RCA connectors
Construction All-steel chassis, fibreglass PCB, ultra low

noise audio transformer

ISO Balancer

Input Impedance 10K Ohms Balanced
Output Impedance 10K Ohms Unbalanced
Input Level (max) +12dB
Frequency Response 20Hz - 20 KHz ± 0.5dB
THD at Max Output 0.2% 0dB 1 KHz, 30 Hz - 20KHz
Insertion Loss 0.75dB @ 1 KHz (600 Ohm source)
Output Connectors 3 pin male XLR, wired Pin 1 Ground, Pin 2 +

Hot, Pin 3 - Cold. Chassis Ground is connected
to the RCA Input connector shield/ground

Input Connectors Stereo RCA connectors
Construction All-steel chassis, fibreglass PCB, ultra low

noise audio transformer

Please Note. The ISO Balancer is normally supplied with the Left and Right
Output Pin 1 floating to ensure full transformer isolation, with the two in­ternal Pin 1 jumpers (designated G1 and G2) set in the 'Lift' position.
When it is being used in conjuction with the ISO De-Balancer we suggest
that these two internal jumpers be moved to the 'In' position. This ensures
that the interconnecting cables' shield drains back through the ISO Balancer
Ground circuit.
Full transformer isolation is still supplied by the ISO De-Balancer's Input
Transformers

Using your Audibox

The ISO Balancer is designed to con­vert an Unbalanced signal to a Bal­anced signal suitable for connection
to professional audio systems. It is a
self contained, stand alone dual
channel unit with an ultra low noise
audio transformer inside. It will have
applications in Live Sound, Studio or
Broadcast use.
The ISO De-Balancer does the op­posite, and converts a Balanced sig­nal to an Unbalanced signal suitable
for connecting to consumer prod­ucts. It is a self contained, stand alone
dual channel unit with an ultra low
noise audio transformer inside. It will
primarily have applications for Instal­lation Sound, although Studio or
Broadcast engineers will find it a use­ful tool as well.

Power Requirements

None. The ISO Balancer and ISO
De-Balancer are passive iso-trans­former coupled devices, ie. they
don't need power to run.
Please note that it is advisable to
power down the system before con­necting these units, to avoid the risk
of sending large electrical and signal
noises through the system when dis­connecting and connecting.

Did you know ...

As well as the ISO-Balancer and
the ISO De-Balancer, ARX manu­facture other products in the unique
Audibox range:

The ISO-Later is a Dual channel
Unbalanced to Balanced Low Im­pedance transformer isolated con­verter, and the ISO Splitter is a
transformer isolated 1 input to 2
outputs splitter for splitting 1 input
2 ways in applications where com­plete Galvanic isolation is required.
Both available in Single Channel or
Double Header format.

The AV-DI is a stereo AudioVisual
Active Direct box, with dual RCA
and stereo mini jack inputs plus dual
XLR outputs. Ideal for interfacing
consumer audio (especially compu­ter sound cards) with professional
systems.

The Ear Driver is a Headphone
Amplifier with 2 pairs of Stereo in­puts each feeding two channels of
headphone level outputs. It has in­dividual Level controls plus a 12 ­15VDC power connector. A com­pact, flexible unit

The P ro-DI is an ultra compact Ac­tive Direct box, with normal High
Impedance input as well as a sepa­rate speaker level input for connec-

Page 4

tion to instrument amplifiers.
Other features include –20dB Pad
and Audio Ground Lift switches, plus
Phantom or DC power options.
Available in Single Channel or Dou­ble Header format

The DI-Pre is an Ultra compact Mi­crophone Pre amp with XLR input,
balanced jack output and 10 to 60dB
Gain control.
Other features include –20dB Pad
switch, Clip LED and Phantom Power
switch, plus DC power connector.
Available in Single Channel or Dou­ble Header format

For the latest information on the
complete Audibox range, visit our
website:
www.arx.com.au/audibox.htm

Page 5

INTERNA TIONAL LIFETIME WARRANTY

ARX Systems (ARX) warrants to the first purchaser of this Audibox product
that it is free from defects in materials and workmanship under normal use
and service. ARX’s sole obligation under this warranty shall be to provide,
without charge, parts and labour necessary to remedy defects, if any, which
appear within twelve (12) months from date of purchase; and to supply
parts only for the life of the product to the original purchaser.
This is our sole warranty. It does not cover finish or appearance items, nor
does it apply if the Audibox has been, in ARX’s sole judgement:

• Subjected to misuse, abuse, negligence or accident;

• Repaired, worked on, or altered by persons not authorized by ARX,

• Connected, installed, adjusted or used otherwise than in accordance with
the instructions supplied by ARX.

This warranty gives you and us specific legal rights, and you may also have
other rights which can vary from state to state.

To obtain warranty service for your Audibox, call, write, or
Email to ARX or the dealer you purchased it from. They
will give you the correct address to send your unit to. Have
your sales receipt showing date of purchase handy, and in­clude a copy of it with your Audibox. Please pack the unit
well - we are not responsible for any damage caused by
unsuitable packing during shipment. Send the unit to us pre­paid, by a delivery service like FedEx, UPS, or any other
service that can track the shipment. We will return it to you
freight paid.
If you have any questions, or any part of this is unclear , please
write to ARX Systems in the country of purchase, or to the
address below.
PO Box 15,Moorabbin, Victoria 3189, Australia.
Phone: [phone] Fax: [phone]
You can Email the factory at: [e-mail]

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Owner's Manual

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Audibox Balancer/De-Balancer Manual v 1.1 ©2005 ARX®

Email: [e-mail]

On the Net: www.arx.com.au

International Fax: [phone]

Phone: [phone] Fax: [phone]

Moorabbin, Victoria 3189, Australia

ARX Systems Pty Ltd, PO Box 15,

Thank you for choosing this Audibox
product from ARX. We hope you
enjoy using this unique product as
much as we enjoyed creating it.
As with all ARX equipment, it has un­dergone extensive factory testing and
‘burn in’ before shipping.
To ensure continued trouble free use,
please familiarise yourself with the
contents of this manual before using.

All models in the Audibox range

feature the same heavy duty all-steel
chassis finished in attractive matt blue
textured powdercoat, with
hardwearing epoxy screen printing
and large slip resistant rubber foot
pads.
By their very nature these units are
compact and portable; to protect
your investment we’ve added numer­ous security features including a slot
for computer lock, and the option of
a permanent table mounting kit.
A rack mount kit is also available to
rack up to 3 units plus power supply
in 1 RU

The ISO-Balancer

Dual channel Unbalanced to Bal­anced Low Impedance transformer
isolated converter
Dual Unbalanced RCA inputs; Bal­anced XLR Outputs
Available in Dual Channel format
only.

The ISO-De-Balancer

Dual channel Unbalanced to Bal­anced Low Impedance transformer
isolated converter.
Dual Balanced XLR Inputs and 2
pairs of De-Balanced RCA Outputs.
Available in Dual Channel format
only.

Page 2

The ISO-Balancer

Connections:
Dual Unbalanced RCA inputs; Balanced XLR Outputs
Available in Dual Channel format only.

The ISO-De-Balancer

Connections:
Dual Balanced XLR Inputs and 2 pairs of De-Balanced RCA
Outputs.
Available in Dual Channel format only.

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