Radial USB-PRO

Stereo USB Laptop DI

Our price:$399.00 GST
Order Code: USB-PRO

IN STOCK 11 (more can be backordered)

Stereo DI for USB Source; level control; mono sum; headphone out


  • 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

More info – via Radial website:

Made for plug and play simplicity, the USB-Pro will automatically be listed as an available sound card in the audio settings in all popular operating systems including Windows XP, Windows 7/8, and Mac OSX.

Digital-to-analog conversion can be monitored on headphones through the 3.5mm analog output to check signal quality and level before connecting to a sound system. A mono-sum switch may be engaged to check for phasing or for connection to a mono system. Should hum or buzz caused by ground loops be encountered, two recessed side-access switches allow the user to insert isolation transformers into the signal path. To further reduce susceptibility to noise, this is augmented with a ground lift switch that lifts pin-1 on both XLR jacks.

As with all Radial products, the USB-Pro is designed to handle the rigors of professional touring. Our unique book-end design creates protective zones around the switches, connectors and controls to keep them out of harm’s way. Inside, our time-tested I-beam construction assures the sensitive internal PC board will not torque, which could cause premature part failure. Finally, a full bottom no-slip pad provides mechanical isolation and electrical insulation to ensure quiet operation.


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: 84 x 127 x 48mm
Weight: 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