BOX Series


  • .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.
  • .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 .
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 linelevel 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.


The Unika DI-USB is a high-resolution stereo direct box designed to convert sound files from a laptop computer, it is a fully USB 2.0 compliant, 24bit digital to analog audio converter and also a direct input that lets you interface a high impedance (Hi-Z) audio output with professional low impedance (Low-Z) PA and recording systems.

In the case of the DI-USB Box, the digital audio signal is converted to analog and feeds directly into 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 connect directly to mixing consoles, power amplifiers and self-powered speakers alike. The DI-USB Box ensures the digital signal is delivered to the PA as faithfully as possible.

How to Replace BOX Series Battery


USB Compliance USB 2.0 full speed, type B connector
Bit Depth     24bit / 16bit
Sampling Rate     44.1KHz / 48KHz auto sensing
Sound File Compatibility     WDM, MME, Core-Audio, ASIO and DirectSound
Software Compatibility     Vista/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 1KHz, 0dBu output
Hi-Z Direct Input Unbalanced, XLR/¼"TRS combo jack.
(Pin-2 Hot, Pin-3&1 Ground).
Link Output Unbalanced, Parallel link output ¼"TRS jack
for feeding to other equipment.
Direct Input Attenuator At 0dB At -20dB At -40dB
Direct Input Impedance 1 MΩ 47KΩ 47KΩ
Max. input level before Clip +9dBu +29dBu +49dBu
Output Impedance 200Ω nominal, Transformer Balanced.
Analog output Balanced transformer isolated
(XLR-M, Pin-1 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 Power derives power from USB, plug-in 9V battery or
+20V to +48V Phantom power
Finish Durable powder coat
Size (H×W×D) 158 x 112 x 46 mm
Weight 1.2Kg, 2.6lbs.
Construction 14 gauge steel cabinet & chassis