UNiKA PRO IS2 Pro Series Audio Interface Dual Passive ISO Transformer User Manual
- June 12, 2024
- UNiKA
Table of Contents
- GENERAL PRECAUTION BEFORE USE
- PRODUCT OVERVIEW
- PARAMETER TEST CONDITIONS
- FEATURES
- WHEN TO USE PRO IS2
- APPEARANCE PARTS & FUNCTIONS
- ELIMINATING GROUND LOOP NOISE
- CONNECTORS WIRING GUIDE
- SYSTEM CONNECTION GUIDE-STAGE
- SYSTEM CONNECTION GUIDE-FIXED INSTALLATION
- SPECIFICATIONS
- Read User Manual Online (PDF format)
- Download This Manual (PDF format)
USER MANUAL
PRO IS2
PRO SERIES AUDIO INTERFACE
DUAL PASSIVE ISO TRANSFORMER
DESIGN & MADE IN TAIWAN 
GENERAL PRECAUTION BEFORE USE
Thank you for purchasing the UNiKA PRO SERIES AUDIO INTERFACE. Before using,
please read this manual carefully and pay attention to every detail that you
must pay attention to. If you use a mixer to connect to this interface, please
turn off the mixer power and +48V phantom power before connecting, and then
turn on the power and phantom power after inserting the signal cables. For
passive models, please do not turn on the phantom power to avoid leakage or
damage the equipment.
If using a model with a volume knob, turn the volume knob to the minimum.
During use, please do not plug or unplug the wires arbitrarily to avoid signal
loss. Please refer to the following instructions for the soldering method of
the plugs to ensure the expected level and keep the signal smooth.
IIf you need further installation or operation guidance, please directly
contact UNiKA’s dealer or distributor, or write to the following mail address
for help:
info@unikapro.com
PRODUCT OVERVIEW
PRO IS2 is a passive two-input and two-output isolated signal splitter without
the need to install batteries or provide phantom power.
PRO IS2 has a pair of built-in UNiKA-PRO EI9AE3R3 1.25:1 isolation transformer
with special coating and surrounded by Oriental silicon steel shield which has
a special copper foil layer and a dedicated ground layer, which allows this
device to restore high signal/noise ratio and dynamic sound, and can avoid
unnecessary Leakage caused by radio frequency interference, ground
interference and potential difference. PRO IS2 is particularly suitable for
recording studios, live performances and fixed installation projects.
PRO IS2’s input uses Combi sockets, suitable for both balance XLR and TRS
plugs. The CH-1/CH-2 output channels each have independent UNiKAPROTM
isolation transformer and independante GND/LIFT switch for easy connection to
remote or different power sources at the end of the equipment to eliminate the
leakage and noise caused by the potential difference and the ground loop.
CAUTION
This product has undergone rigorous inspection before leaving the factory. If
customers encounter failures during use, please contact your local dealer or
distributor for replacement or repairing, do not disassemble the case or
replace parts by yourself, which will invalidate the warranty.
For details, please refer to the warranty regulations in the enclosed warranty
card, and fill in the details, and get a valid stamp or signature of the
dealer or distributor.
PARAMETER TEST CONDITIONS
In the development and manufacturing process, Audio Precision’s 2700 series and 500 series are used to test and verify electrical characteristics.
FEATURES
- One input & three output audio splitter
- CH-1/CH-2 are equipped with separate UNiKA-PRO EI9AE3R3 isolation transformer
- Use XLR jack for input
- Set the PHASE REVERSE button for CH-2 input
- The output is equipped with independent GND/LIFT switches
WHEN TO USE PRO IS2
PRO IS2’s CH-1/CH-2 are each equipped with independent EI9AE3R3 professional
audio isolation transformer, which is a transformer that works in the audio
range, also known as a low-frequency transformer. The frequency range is
generally from 20 to 20000 Hz. It is mainly used for audio transmission
between systems or devices. It can completely isolate the potential difference
between two systems, avoid hum interference caused by ground loop problems,
and prevent excessive potential difference from damaging the input level of
the device. The safe transmission of signals is an essential product for long-
distance transmission of analog audio systems.
However, since it does not have an input amplifier circuit and attenuator, it
can only transmit balanced signals through an isolation transformer or convert
unbalanced signals into balanced signals for transmission, and does not have
the function of increasing the level. If the input signal is of a high-
impedance type, such as musical instruments or some players, it is recommended
to use other DIs with input attenuators in the PRO series to transmit signals.
These DIs also have built-in EI9AE3R3 professional audio isolation
transformer.
The CH-2 is attached with an invert button. If your wire’s hot pin is pin-3,
you can press this button to switch the hot pin to pin-2.
Each output has an independent GND/LIFT button to ground or float pin-1 of the
output to eliminate noise or leakage in the event of ground noise or
inadvertent ground loops.
APPEARANCE PARTS & FUNCTIONS
- CH-1 signal output: XLR terminal pass through the isolation transformer.
- Output grounding/floating switch: when the switch is not pressed, the first pin (PIN-1) of XLR is grounded. PIN-1 will be disconnected from ground after pressing. This button should depend on the system. Used in the situation, in order to isolate the ground loop noise or leakage.
- CH-1 signal output: XLR terminal pass through the isolation transformer.
- Signal input: One XLR jack be able to input balance LINE signal.
- Direct monitor output: XLR terminal, direct-through output without isolation transformer.
- REV: The CH-2 is attached with an invert button. If your wire’s hot pin is pin-3, you can press this button to switch the hot pin to pin-2.
ELIMINATING GROUND LOOP NOISE
The built-in channel independent balanced isolation transformer has solved the potential difference leakage problem. When the system causes a ground loop due to poor wiring, the noise can be eliminated through the GND/LIFT button.The GND/LIFT button determines whether pin 1 of the output XLR is grounded, grounded when it bounces, and disconnected from ground when pressed.
CONNECTORS WIRING GUIDE
The unbalanced connection, pin-2 is hot, pin-3 is shield paralleled
with pin-1.
SYSTEM CONNECTION GUIDE-STAGE
When the stage and F.O.H. be powered by different power supply source
FOH CONSOLE
SELF-POWERED STAGE MONITOR OR FOH SPEAKER POWERED BY DIFFERENT
POWER SOSURCE
MONITOR OR PRODUCTION CONSOLE POWERED BY DIFFERENT POWER
SOSURCE
SYSTEM CONNECTION GUIDE-FIXED INSTALLATION
When the main and extension system be used by different power supply source
SPECIFICATIONS
(Specifications are subject to change without notice.)
PRO IS2
| Circuit principle | Passive/Transformer balance output |
|---|---|
| Input connector | 2 x Combi jacks |
| Monitor out connector | N/A |
| Input impedance | 4.7KΩ balance/10KΩ unbalance |
| Output impedance | 600Ω |
| Max. input level before clipping | +22dB |
| Max Output level | +22dB |
| Output connector | 2 x Male XLR through ISO Transformer |
| Output GND/LIFT switch | Independent push button for each channel |
| Frequency response | 20Hz-20KHz, -0.3/+0.1dB |
| S/N ratio @20Hz~20KHz un-weight | >120dB |
| T.H.D. @1KHz 0dBV output | <0.02% |
| Transformer Ratio | 1.25:1 |
| Chassis | 1.6mm/1.2mm steel cabinet and chassis |
| Surface finished | Durable complex painting |
| Dimension (W x D x H) | 78 x 124 x 46 mm |
| Weight | 0.62kg |
| Shipping weight | 0.65kg |
| Packing per carton | 20pc/13.60kg |
| Shipping dimension per carton | 305 X 283 X 195 mm |
UNiKA Electronic Co., Ltd.
www.unikapro.com
6F, No.168, Xin-Hu 2nd Rd.
Nei-Hu District, Taipei City. 11494.
Taiwan, R.O.C.
+886 2 27933017
+886 2 27928264
info@unikapro.com
Read User Manual Online (PDF format)
Read User Manual Online (PDF format) >>