User Manual for UNiKA models including: PROTWO Pro Series Audio Interface Dual Passive Direct Box, PROTWO Audio Interface Dual Passive Direct Box, Interface Dual Passive Direct Box, Dual Passive Direct Box, Direct Box
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2 PRO TWO FEATURES • Built-in UNiKA-PROTM EI9AE3R3 1.25:1 isolation transformer for each channel • The input socket uses a pair of TRS jacks • Use a pair of TRS jacks as through out terminal • There is 0dB/-20dB input signal attenuation switch
USER MANUAL PRO TWO PRO SERIES AUDIO INTERFACE DUAL PASSIVE DIRECT BOX DESIGN & MADE IN TAIWAN Index GENERAL PRECAUTION BEFORE USE PRODUCT OVERVIEW CAUTION PARAMETER TEST CONDITIONS FEATURES APPLICATIONS APPEARANCE PARTS & FUNCTIONS INPUT PAD ATTENUATION ELIMINATING GROUND LOOP NOISE CONNECTION GUIDE SPECIFICATIONS UNiKA Electronic Co., Ltd. www.unikapro.com 6F, No.168, Xin-Hu 2nd Rd. Nei-Hu District, Taipei City. 11494. Taiwan, R.O.C. cc+886 2 27933017 cc+886 2 27928264 ccinfo@unikapro.com UNiKA PRO TWO 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 TWO is a passive dual-channel DI box. No need to install battery or provide phantom power to make it work. PRO TWO has a pair of built-in UNiKA-PROTM EI9AE3R3 1.25:1 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 TWO is particularly suitable for electronic musical instruments, recording studios and fixed installation projects that do not use mixers. It converts high-impedance signals into low-impedance balanced signals, which facilitates extending the wiring distance and blocking interference. The PRO TWO uses a pair of TRS socket on the input, and a pair of TRS through out are convenient for musician 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. 1 UNiKA PRO TWO User Manual 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, Audio Precision's 2700 series and 500 series are used to test and verify electricprocessal characteristics. FEATURES · Built-in UNiKA-PROTM EI9AE3R3 1.25:1 isolation transformer for each channel · The input socket uses a pair of TRS jacks · Use a pair of TRS jacks as through 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 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. 2 UNiKA PRO TWO User Manual APPEARANCE PARTS & FUNCTIONS CH-1 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 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-2 signal output: XLR terminal, isolated balanced output of the Transformer. CH-1/CH-2 Signal input: A pair of 6.35mm TRS sockets, can input balanced or unbalanced LINE signal. PAD input attenuation switch: Provide 0/20dB two options, when inputting signals of various impedances and levels. It can be attenuated by 20dB to avoid overload or clipping. CH-1/CH-2 signal through out: Convenient for musicians musical instrument speakers or other DI and peripheral equipment. 3 UNiKA PRO TWO User Manual INPUT PAD ATTENUATION The most widely used DI box is to connect electronic musical instruments, 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. 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. 4 UNiKA PRO TWO User Manual CONNECTION GUIDE Output from computer or musical instrument to INPUT Output via THRU OUT to musical instrument speakers or peripherals Connect the balanced wire from ISO OUT to the mixer 5 UNiKA PRO TWO User Manual CONNECTION GUIDE XLR-Female connector XLR-Male output jack 21 3 12 3 1-Shield pin 2-Hot pin 3-Cold pin The unbalanced connection, pin-2 is hot, pin-3 is shield paralleled with pin-1. Tip-Signal Hot Ring-Signal Cold Sleeve-Shield TRS Balance plug Tip-Signal Sleeve-Shield TS Unbalance plug 6 UNiKA PRO TWO User Manual SPECIFICATIONS (Specifications are subject to change without notice.) PRO TWO Circuit principle Input connector Thru connector Input pad switch Output connector Output GND/LIFT switch Input impedance Output impedance Max. input level before clipping Max Output level Frequency response S/N ratio @20Hz~20KHz un-weight T.H.D. @1KHz 0dBV output Transformer Ratio Chassis Surface finished Dimension (W x D x H) Weight Shipping weight Packing per carton Shipping dimension per carton Passive/Transformer balance output 2 x TRS 2 x TRS 0/-20dB push button 2 x Male XLR through ISO Transformer Shared push button 1K / 0dB & -20dB 50 +22dB +22dB 20Hz-20KHz, -0.05/+0.25dB >120dB <0.02% 1.25:1 1.6mm/1.2mm steel cabinet and chassis Durable complex painting 78 x 124 x 46 mm 0.64kg 0.67kg 20pc/14.00kg 305 X 283 X 195 mm 7Adobe PDF Library 10.0.1 Adobe InDesign CS6 (Windows)