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UNiKA DI-USB

    User Guide

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The DI-USB is a high-resolution stereo digital audio converter (DAC) and 

direct box that is designed to connect to any computer system to seamlessly 

transfer digital audio to analog. 

A  professional  Hi-Z  direct  input  is  also  equipped,  this  is  most  commonly 

used with guitar pickups or keyboards, it also can be fed either from a line-

level output from the head (pad set to -20dB) or from the amplifier power 

output. A stereo pair of balanced XLR audio outputs with adjustable level 

control  then  feeds  the  signal  to  a  microphone  preamplifier,  PA  system, 

mixing console or even a powered speaker! 

Made  for  plug  and  play  simplicity,  the  DI-USB  will  automatically  be  listed 

as  an  available  sound  card  in  the  audio  settings  in  all  popular  operating 

systems

,

including Windows 7/8, Windows 10 and Mac OSX. 

Connection to a computer is accomplished through a standard USB type-B 

port.  Digital-to-analog  conversion  can  be  monitored  on  headphones 

through  the  3.5mm  analog  output  jack  to  check  signal  quality  and  level 

before connecting to a sound system. Two isolated output transformers are 

equipped to eliminate any hum or buzz caused by ground loops. To further 

reduce  susceptibility  to  noise,  this  is  augmented  with  a  ground  lift  switch 

that lifts pin-1 on both XLR jacks.

FEATURES

•  Stereo USB Laptop Direct Box.
•  High impedance direct input for electronic musical instrument signal feed.
•  High performance 24bit digital audio converter.
•  Ready to use without the need of a driver.
•  Standard USB type-B port for connection to computer.
•  3.5mm analog headphone output to check signal.
•  Level control for outputs and headphone.
•  The direct input signal will be mixed to the USB stereo signal at the output stage.
•  A Mono-Sum switch to mix the left and right channel signals to form a

 

monaural signal in both output channel.

•  Selectable 3 steps attenuator for Hi-Z direct input.
•  Accept power from 9V battery, +20V to +48V phantom power or 5V from USB. 
•  2 channel XLR Balanced Low-Z output with isolation transformer.

Summary of Contents for DI-USB

Page 1: ...t Parallel Link connection 06 Eliminating hum and buzz 07 Using the headphone output 08 Specifications 6F No 168 Xin Hu 2nd Rd Nei Hu District Taipei City 11494 Taiwan Republic of China 886 2 27933017...

Page 2: ...to the direct box circuit to produce Low Z balanced left and right stereo signals The built in preamp allows you to adjust the output level from mic level to line level and enables the DI USB Box to c...

Page 3: ...to analog conversion can be monitored on headphones through the 3 5mm analog output jack to check signal quality and level before connecting to a sound system Two isolated output transformers are equi...

Page 4: ...UNiKA DI USB User Guide 3 AUDIO CONNECTION Audio connection of the UNIKA DI USB Box DI Input USB Input Link Output Headphone Output Stereo Outputs...

Page 5: ...luminate when the USB communicate with the computer has established Mono Sum switch When the switch is depressed the left and right channel signal will be mixed to form a monaural signal in both outpu...

Page 6: ...e generic drivers are compatible with most operating systems including Mac OSX Windows 10 and Windows 7 8 The DI USB Box s USB LED will illuminate to let you know it is connected Go to your system set...

Page 7: ...ut can also be fed either from a line level output from the head pad set to 20dB or from the amplifier power output speaker output pad set to 40dB Eliminating hum and buzz The Unika DI USB Box is equi...

Page 8: ...e monitored in a live concert environment If you push the level too hard it may distort or cause hearing damage The UNIKA DI USB Box is intended for use by professional audio engineers who are aware o...

Page 9: ...Battery installation Put the battery into the slot Verify the battery polarity is correct and snap it in Press it down into the battery holder Battery removal Press and hold the battery on its bottom...

Page 10: ...WinXP Win7 Win8 Win10 and Mac OSX Frequency response 20Hz to 20KHz 1 1 dB Dynamic range 90dB Noise floor 90dBu unweighted 20Hz to 20KHz Maximum output 9dBu Total harmonic distortion Less than 0 008 at...

Page 11: ...Ground Pin 2 Hot Pin 3 Cold Headphone output 3 5mm TRS Tip Left Ch Ring Right Ch Sleeve Ground Level control Variable works on headphone and XLR outputs Ground lift Lifts pin 1 on both XLR outputs DC...

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