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USER MANUAL PRO 248 PRO SERIES AUDIO INTERFACE DUAL ACTIVE DIRECT BOX DESIGN & MADE IN TAIWAN Index GENERAL PRECAUTION BEFORE USE PRODUCT OVERVIEW CAUTION PARAMETER TEST CONDITIONS FEATURES APPEARANCE PARTS & FUNCTIONS ISO TRANSFORMER SCHEMATIC PULSE TRANSFORMER SCHEMATIC INPUT PAD ATTENUATION...
PRO 248 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.
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FEATURES • Power by external +48V phantom power • Built-in UNiKA-PRO EI30A10E isolation transformer • Use British OEP PT-4 1:1 audio pulse transformer in phantom power circuit • +48V status indicator on the upper cover •...
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UNiKA User Manual PRO 248 APPEARANCE PARTS & FUNCTIONS ① CH-1 signal output: XLR terminal, isolated balanced output of the transformer, need to turn on +48V phantom power supply for PRO 248 proper working after connecting to the mixer. ② Output grounding/floating switch: when the switch is not pressed,the first pin (PIN-1) of XLR is grounded.
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UNiKA User Manual PRO 248 ISO TRANSFORMER SCHEMATIC UNiKA-PRO EI30A10E Primary Screen Secondary Cooper foil/ Core PULSE TRANSFORMER SCHEMATIC OEP PT-4 3 layers of thermo setting adhesive polyester tape Primary Secondary between windings...
UNiKA User Manual PRO 248 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.
UNiKA User Manual PRO 248 CONNECTION GUIDE Output from musical instrument to INPUT Output via THRU OUT to musical instrument amplifiers Connect the balanced wire from ISO OUT to the mixer, the mixer needs to turn on +48V phantom power...
UNiKA User Manual PRO 248 SPECIFICATIONS (Specifications are subject to change without notice.) PRO 248 Active low-noise op-amp with Transformer Circuit principle balance output Input connector 2 x TRS Thru connector 2 x TRS Input pad switch/indicator 0/-20dB push button with LED...
EAN Code 4711064410198 2. Manufacturer Manufacturer UNiKA Electronic Co.,Ltd. Address 6F, No.168, Xinhu 2nd Roadn, Nei-Hu, Taipei, Taiwan 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.
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