117000 PRO-ONE Passive Line Level DI Box with Custom Isolation Transformer
User Manual
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 ONE is a passive single-channel DI box. No need to install a battery or provide phantom power to make it work.
EI30A10E 1+1:1+1 isolation transformer, 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 ONE is particularly suitable for electronic musical instruments, recording studios, and fixed installation projects that do not use mixers. It converts PRO ONE has a built-in UNiKA-PRO TM high-impedance signals into low-impedance balanced signals, which facilitates extending the wiring distance and blocking interference.
The PRO ONE uses a balanced/unbalanced combo socket on the input, and a TRS throughout is convenient for musicians to pass the direct signal to the instrument amplifier. 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 GND/LIFT button 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-PRO™ EI30A10E isolation transformer
- The input socket uses a Combo jack
- Use TRS jack throughout out terminal
- 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 decks, 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 a separate power system or power generator
APPEARANCE PARTS & FUNCTIONS
- Signal output: XLR terminal, isolated balanced output of the 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 the ground after pressing.
This button should depend on the system.
Used in the situation, in order to isolate the ground loop noise or leakage. - Signal input: One combo jack be able to input balance and unbalance signal by TRS/TS and XLR plug.
- PAD input attenuation switch: Provide 0/-20dB two options, when input signals of various impedances and levels. It can be attenuated by 20dB to avoid overload or clipping.
- Signal throughout Convenient for musicians musical instrument speakers or other DI and peripheral equipment.
ISO TRANSFORMER SCHEMATIC
INPUT PAD ATTENUATION
The most widely used DI box is to connect electronic musical instruments, the sound source of A/V equipment 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 the ground when pressed.
CONNECTION GUIDE
The unbalanced connection, pin-2 is hot, pin-3 is shield paralleled with pin-1.
SPECIFICATIONS
(Specifications are subject to change without notice.)
| PRO ONE | |
| Circuit principle | Passive/Transformer balanced output |
| Input connector | 1 x Combo |
| Thru connector | 1 x TRS |
| Input pad switch | 0/-20dB push button |
| Output connector | 1 x Male XLR through ISO Transformer |
| Output GND/LIFT switch | Push-button |
| Input impedance | 1K0 / 0dB & -20dB |
| Output impedance | 500 |
| Max. input level before clipping | +22dB |
| Max Output level | +22dB |
| Frequency response | 201-1z-20KHz, -0.31+0dB |
| S/N ratio @20Hz-20KHz un-weight | >120dB |
| T.H.D. @1KHz OdBV output | <0.02% |
| Transformer Ratio | 1:1+1:1 |
| 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 | 0.55kg |
| Shipping weight | 0.58kg |
| Packing per carton | 20pc/12.20kg |
| Shipping dimension per carton | 305 X 283 X 195 mm |
EU DECLARATION OF CONFORMITY
- Equipment
Product name Single passive direct box Model PRO-ONE EAN Code 4.71E+12 - Manufacturer
Manufacturer UNiKA Electronic Co., Ltd. Address 6F, No.168, Xinhu 2nd Road, Nei-Hu, Taipei, Taiwan This declaration of conformity is issued under the sole responsibility of the manufacturer.
- The object of the declaration, Product: Direct box for musical instrument and A/V device.
- The object of the declaration described in point 4 is in conformity with the relevant
Union harmonization legislation 2014/30/EU The Electromagnetic Compatibility Directive - References to the relevant harmonized standards used, or references to the specifications in relation to which conformity is declared:
EMI: EN 55032:2015 IEC 61000-4-3:2006+A1:2007+A2:2010 EN 61000-3-3:2014 IEC 61000-4-42012 EN 61000-3-3:2013 IEC 61000-4-5:2014+A1:2017 EMS: IEC 61000-4-6:2013/CORE1:2015 EN 55035:2017 IEC 61000-4-8:2009 IEC 61000-4-2:2008 IEC 61000-4-11:2-4+A1:2017 - Where applicable, the above equipment will be tested and revision of existent certificate by WH Technology Corp. (TAF Accreditation 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 esults due to production tolerance.
- The technical file is available from the manufacturer at the address above
Signed for and on behalf of: UNiKA Electronic Co., Ltd. Place of issue: Taipei Date of issue: May 03th, 2021
Name: Yung-Ho Hsu
Position: Marketing & Product director
Signature:
UNiKA Electronic Co., Ltd.
www.uunniikappro.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
Documents / Resources
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UNiKA 117000 PRO-ONE Passive Line Level DI Box with Custom Isolation Transformer [pdf] User Manual 117000, PRO-ONE Passive Line Level DI Box with Custom Isolation Transformer |
