Radial Engineering USB-Pro
Digital Stereo DI for Laptops with Level Control


Our Price: $229.99
List Price: $260.00
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The Radial Engineering USB-Pro 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 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 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.

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 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.  Their unique book-end design creates protective zones around the switches, connectors and controls to keep them out of harm's way.  Inside, Radial's 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.

Radial Engineering USB-Pro Features:

  • High performance 24-bit 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

Radial Engineering USB-Pro Applications:

  • Using the USB-Pro with a laptop: Nothing is simpler than the USB-Pro.  You plug it into your laptop and it automatically delivers your digital audio files to spectacular sounding stereo audio via the 24-bit digital to analog converters.  You merely connect to the mic inputs on your mixing console or to any +4 line level device and you are set to go.
  • Using the USB-Pro in the studio: Convert your client's files instantly.  Simply connect the laptop to the USB-Pro and transfer files to the recording system at the maximum sample rate for best audio fidelity.  The built-in headphone amp makes it easy to check for signal integrity.
  • Using the USB-Pro for a video presentation: Anyone that has incorporated audio with a projector knows that noise can be a serious problem.  The USB-Pro is equipped with isolation transformers that may be switched in to eliminate hum and buzz caused by stray DC voltage and ground loops.
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