Unika Stage Series User manual

ISO-2
USER GUIDE
Index
Overview
Features
Audio Connection
Various System Connection
Eliminating Hum and Buzz and the
Ground Loop
Specications
Measurement
6F, No.168, Xin-Hu 2nd Rd.
Nei-Hu District, Taipei City. 11494.
Taiwan, R.O.C.
[phone]
[phone]
[email protected]
Unika Electronic Co., Ltd.
www.unikapro.com
Stage Series
Made in Taiwan

UNiKA ISO-2 User Guide
1
OVERVIEW
FEATURES
The ISO-2 is a passive audio isolator designed to be inserted into the signal
chain to block hum and buzz caused by ground loops. The ISO-2 accepts
unbalanced or balanced signals and is equally suitable for consumer
electronics and professional line-level devices.
The ISO-2 can be operated as a dual input and outputs, and since the circuit
is passive, no power is required. Whether an unbalanced or balanced signal
is connected, the ISO-2 will automatically convert the signal depending on
the type of cable and connector plugged in.
[email protected]
If you still need further clarification, please send email to us and we will
do our very best to reply you in short order.
The ISO-2 is a simple passive device, designed to electronically-isolate
connected line-level audio equipment without degrading the audio quality.
On the ISO-2 there are 2 inputs and 2 outputs which block DC voltage and
prevent buzz and hum from ground loops. Both outputs feature individual
ground lift switches to help further reduce ground loop noise.

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UNiKA ISO-2 User Guide
①Ch-1 input: transformer balanced XLR-1/4” TRS Combo Connector.
②Ground Lift switch for Ch-1: disconnects pin-1 on output-1 XLR connector.
③Phase reverse switch: Swaps pin-2 and pin-3 on Ch-2 when REV is selected.
④ Ground Lift switch for Ch-2: disconnects pin-1 on output-2 XLR connector.
⑤Ch-2 input: transformer balanced XLR-1/4” TRS Combo Connector.
⑥Output-2: transformer balanced XLR output.
⑦Output-1: transformer balanced XLR output.
① ② ③ ④ ⑤
⑥ ⑦

UNiKA ISO-2 User Guide
3
AUDIO CONNECTION
Before connection:
As with all audio gear, always ensure audio system levels are turned down
or equipment turned off before making connections. This will avoid plug-
in or turn-on transients from damaging more sensitive components such as
tweeters.
Connect ISO-2 to system:
The ISO-2 has two combination XLR/TRS input connectors, wired to the
AES standard pin-1 ground, pin-2 hot (+), pin-3 cold (-).
Balanced or unbalanced output signal can be connected to the input of ISO-
2; the isolated outputs will always be balanced signals.
The balanced output of the ISO-2 is line level, meaning that it should be
connected to the line input of a mixing console.
Suggestions about distance cable running:
Unbalanced cables are much more susceptible to noise than their balanced
counterparts, keeping unbalanced cables under 8 meters (25’) in length is
good practice while balanced cables can easily extend to 100 meters (300’).

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UNiKA ISO-2 User Guide
For Unbalanced connection, pin-3 should be connected to Ground with pin-1.
XLR-TRS Combo input
1-Ground2-Signal Hot +
3-Signal Cold -
Fig-2: XLR-¼"TRS Combo
socket for direct input
Fig-1: XLR Plugs Balanced
connection:
1-Ground
2-Signal Hot (+)
3-Signal Cold (-)
Fig-3: ¼"TS Unbalanced connection Fig-4: ¼"TRS Balanced connection
Tip-Signal (+)
Sleeve-Ground
Tip-Signal Hot (+)
Ring-Signal Cold(-)
Sleeve-Ground
1
Female Male
2 1
3 3
2

UNiKA ISO-2 User Guide
5
ELIMINATING HUM AND BUZZ AND THE GROUND LOOP
The ISO-2 is equipped with output isolation transformers to eliminate hum and
buzz caused by stray DC voltage and ground loops.
Computers, CD players and other consumer equipment can be noisy -this
is particularly true when incorporating audio with a projector -so isolation
transformers can be very useful when combating system noise.
The independent Ground Lift switches on the outputs takes this one step further
by lifting pin-1 on the XLRs. Computers are often the source for noise problems
in audio systems, so greater care is certainly needed to keep things quiet.
VARIOUS SYSTEM CONNECTION
Fig-6: Mixing console to devices with different power source
Fig-5: Mobile device to mixing console
Fig-7: Computer playback to powered speakers
Mobile device FOH System Mixer
FOH System Mixer
Outside Broadcast Truck
Computer playback
Powered speakers
Digital Audio Work Station

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UNiKA ISO-2 User Guide
SPECIFICATIONS
Circuit design
Input connectors 2 Balance combo jack
( Pin-2 hot, Pin-3 cold, Pin-1 ground )
Input impedance 47KΩ
Max. input level before clipping +26dBv
Output device 2 XLR w/balance transformer isolated
Output impedance 600Ω nominal, Transformer balance
Output level +26dBv
Frequency resonponse 20Hz to 20KHz +0.2 / 0 dB
Dynamic range >130dB
S/N ratio~ un-weight 20Hz to
20KHz
-136dB
T.H.D~ 1KHz, 0dBV output < 0.001%
Ground / Lift switch Lift pin-1 on XLR outputs, separate
Reverse switch Channel 2 input
Construction 1.6 / 1.2mm steel cabinet & chassis
Surface finished Durable powder coating
Dimension (WxDxH) 124 x 78 x 46 mm
Weight 0.5Kg
Shipping weight 0.6Kg
Packing per carton 20pcs / 13Kgs
Shipping dimension per carton 350 x 310 x 207mm
(Specications are subject to change without notice.)

UNiKA ISO-2 User Guide
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MEASUREMENT

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UNiKA ISO-2 User Guide

UNiKA ISO-2 User Guide
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MEASUREMENT

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UNiKA ISO-2 User Guide