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Radial Engineering


Radial USB-Pro Stereo USB Laptop DI

The Radial USB-Pro is a stereo direct box designed to convert a USB digital audio stream to analog. It features true 24- bit processing to deliver pristine audio and it automatically self-configures without a driver for Windows XP, Windows 7/8, and Mac OSX.  Features include a ground lift and switchable transformer isolation to eliminate hum and buzz caused by ground loops, stereo balanced XLR outputs and a headphone out for testing. Plug and play easy to use, the USB-Pro has already become a favorite around the globe to get perfectly clean sound out of your laptop computer.


      • High performance 24bit digital audio converter
      • Ready to use without the need of a driver
      • 3.5mm analog headphone output to check signal
      • Balanced Lo-Z outputs with switchable isolation

      Specifications are subject to change without notice.
      Audio circuit type: Custom decoder with analog line drive
      USB compliance: USB 2.0 full speed
      Bit depth: 24bit (16bit capable)
      Sampling rate: 44.1kHz / 48kHz auto sensing
      Sound file compatibility: WDM, MME, CoreAudio and DirectSound
      Software compatibility: Windows XP/Vista/Win7/Win8 and Mac OS
      Frequency response: 5Hz ~ 40kHz (30Hz ~ 18kHz with isolation)
      Dynamic range: >90dB 
      Noise floor: -90dB
      Maximum gain: +8dBu
      Total harmonic distortion: 0.01%
      Stereo separation: 75dBu
      Output impedance: 300Ω nominal
      Digital input: USB connector B-type
      Analog output: Stereo balanced mic level (2 x XLR-M)
      Headphone output: 3.5mm TRS
      Level control: Variable, works on headphone and XLR outputs 
      Isolation: Switchable for each channel
      Mono switch: Sums left & right inputs to mono 
      Ground lift: Lifts pin-1 on both XLR outputs 
      Power: USB bus powered 500mA maximum
      Finish: Durable powder coat
      Size: 3.3" x 5.0" x 2" (84 x 127 x 48mm)
      Weight: 1.5 lb (680 g)
      FCC approval: Complies with section 15 of the FCC Rules
      Conditions: For use in dry locations only between 5°C and 40°C
      Warranty: Radial 3-year, transferable

      Windows XP/Vista/Win7/Win8 and Mac OS X
Need more info on the Radial USB-Pro? Click HERE for the manufacturer's website >>>