UNiKA PRO PROMMD Pro Series Audio Interface Multi-Media Direct Box User Manual
- June 5, 2024
- UNiKA PRO
Table of Contents
USER MANUAL
PRO MMD
PROSERIESAUDIOINTERFACE MULTI-MEDIA DIRECT BOX
DESIGN & MADE IN TAIWAN
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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 in turn 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 MMD is a dedicated DI box for passive multimedia, without the need to install battery or provide phantom power. PRO MMD has a pair of built-in UNiKA-PROTMEI9AE3R3 1.25:1 isolation transformers 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 MMD is particularly suitable for play deck, computer, and video equipment. It converts high-impedance signals into low-impedance balance signals which is convenient for extending the wiring distance and blocking interference. The input end of PRO MMD adopts two TRS sockets, a pair of RAC sockets, and a mini TRS socket, any one socket can be used as input or throughout. In addition, it is equipped with a 0/-20dB attenuation switch, which is suitable for various types of audio signals with high and low impedance. The output terminal is also equipped with a ground/loating button, in order to quickly eliminate ground noise.
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
- Built-in UNiKA-PROTM EI9AE3R3 isolation transformer for each channel
- The input socket uses a pair of TRS jacks, a pair of RAC and a mini TRS.
- All input jacks can be using for through out.
- There is 0dB/-20dB input signal attenuation switch
- The output is equipped with a GND/LIFT switch
APPLICATIONS
- Convert unbalanced signals of various audio equipment into balanced signals, such as the headphone or line output of computers, play deck or mobile devices.
- Convert the unbalanced signal of the electronic musical instrument into a balanced signal and send it to the mixer.
- Isolate the leakage and hum be generated by potential when two different systems are connected but powered by separate power system or power generator.
APPEARANCE PARTS & FUNCTIONS
-
Left channel signal output: XLR terminal, isolated transformer’s balanced output, no need to use +48V phantom power.
-
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. -
Right channel signal output: XLR terminal isolated transformer’s balanced output, no need to use +48V Phantom power.
-
L/R TRS input and throughout: balanced or unbalanced input, used to connect electronic musical instruments or audio playback equipment and can be used as a through output of Mini TRS and RCA.
-
PAD input attenuator switch: provide two 0/-20dB Option, when inputting signals of various impedances and levels.
It can be attenuated by 20dB to avoid overload or clipping. -
Mini TRS input and throughout: Mini TRS input to connect to mobile devices or computers, and can be used as a through output of Mini TRS and RCA.
-
Stereo RCA input and throughout: Used to connect to consumer playback equipment or professional video card, and can be used as a through output of L/R TRS and Mini TRS.
INPUT PAD ATTENUATION
The most widely used DI box is to connect electronic musical instruments,
sound source broadcasting Amplifiers, and computers, convert their output
signals into balanced signals, and then extend the transmission distance.
The most ideal state is to set the attenuator to 0dB position (button up). For
some high-level output signals, you can press the button to make the signal is
attenuated by 20dB to avoid clipping caused by signal overload.
When the button is pressed, the PAD indicator on the right will light up.
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.
CONNECTION GUIDE
Output from computer, player or electric instrument through TS/TRS/Mini TRS/RCA
SPECIFICATIONS
(Specifications are subject to change without notice.)
PRO MMD
Circuit principle| Passive/Transformer balance output
Input connector| 2 x TRS, 1 x Mini TRS, 1 pair of RCA
Thru connector| Any one of the input sockets
Input pad switch| 0/-20dB push button
Output connector| 2 x Male XLR through ISO Transformer
Output GND/LIFT switch| Shared push button
Input impedance| 10KΩ / 0dB & 12KΩ / -20dB
Output impedance| 600Ω
Max. input level before clipping| +22dB
Max Output level| +22dB
Frequency response| 20Hz-20KHz, -0.3/0.9dB
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| 0.63kg
Shipping weight| 0.66kg
Packing per carton| 20pc/13.80kg
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