UNiKA PRO3SP Pro Series Audio Interface Triple Passive ISO Splitter User Manual
- June 6, 2024
- UNiKA
Table of Contents
UNiKA PRO3SP Pro Series Audio Interface Triple Passive ISO Splitter
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.
If 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 3SP is a passive one-input and three-output isolated signal splitter
without the need to install batteries or provide phantom power.
PRO 3SP has a pair of built-in UNiKA-PROTM EI30A10E 1+1:1+1 isolation
transformers, 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 3SP is
particularly suitable for recording studios, live performances and fixed
installation projects.
PRO 3SP’s input uses XLR balanced sockets, suitable for inputting LINE
signals. The XLR balanced sockets output by MONITOR are parallel and straight
through without isolation transformers; CH-1/CH-2 output channels each have
independent UNiKA-PROTM isolation transformer and shared GND/LIFT switche 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-PROTM EI30A10E isolation transformer
- Use XLR jack for input
- Set the direct output of MONITOR OUT without isolation transformer
- The output is equipped with a shared GND/LIFT switch
WHEN TO USE PRO 3SP
PRO 3SP’s CH-1/CH-2 are each equipped with independent EI30A10E 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 transmitbalanced 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 a built-in EI30A10E professional audio isolation
transformer.
The MONITOR output of PRO 3SP is paralleled from input without isolation
transformer, usually used in near-end equipment, such as the connection
between stage monitor console and active stage monitor speakers.
In an analog system, PRO 3SP is equivalent to a multipoint signal distributor,
which can distribute the signals on the stage to the stage monitor mixer,
F.O.H. console and production console. Or in fixed installation applications,
you can use it to distribute signals to different areas or rooms.
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.
ISO TRANSFORMER SCHEMATIC
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
- Shield pin
- Hot pin
- Cold pin
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
SYSTEM CONNECTION GUIDE-FIXED INSTALLATION
When the main and extension system be used by different power supply source
SPECIFICATIONS
3. This declaration of conformity is issued under the sole responsibility of
the manufacturer.
4. Object of the declaration, Product: Direct box for musical instrument and
A/V device.
5. The object of the declaration described in point 4 is in conformity with
the relevant
Union harmonisation legislation 2014/30/EU The Electromagnetic
Compatibility Directive
6. References to the relevant harmonised standards used, or references to the specifications in relation to which conformity is declared:
7. Where applicable, the above equipment will be tested and revision of
existent certificate by WH Technology Corp. (TAF Accreditatio Number:2954) for
compliance With EMC requirements set forth in the EUROPEAN COUNCIL DIRECTIVE
2014/30/EU and the technical standards mentioned above. The results of testing
in this report apply only to the product/system, which was tested. Other
similar equipment will not necessarily produce the same results due to
production tolerance.
8. The technical file is available from the manufacturer at the address above