Radial USB-Pro

The USB-Pro™ is a high-resolution stereo digital audio converter and direct box that is designed to connect to any computer and seamlessly convert digital audio tracks to a pair of balanced analog outputs.

• High Performance 24bit/96kHz digital audio converter

• Plug & Play, no drivers required

• 5mm headphone output to test signals

• Balanced XLR outputs to feed a mixer or PA

Connect your laptop to a pro audio system
Whether you are playing backing tracks on stage, giving an audio presentation, or performing the role of DJ at an event, the USB-Pro is the easiest way to provide a high quality noise-free connection between a laptop and any sound system. Made for plug and play simplicity, the USB-Pro will automatically be listed as an available sound card in the audio settings of all popular operating systems including Windows and Mac, with 24bit/96kHz digital to analog converters that retain the quality of the audio signal. A stereo pair of balanced XLR outputs allows you to connect to a microphone preamplifier, PA system, mixing console, or even a powered speaker, with an on-board level control for quick and easy volume adjustments. Should any noise be encountered, ground lift switches are provided and isolation transformers can be inserted into the signal path to eliminate hum and buzz from ground loops, for a clean connection to the PA.

FEATURES

Level
Used to adjust both the main stereo and headphone output signal levels. 

Mono
Sums the stereo signal to mono to reduce the channel count or feed two sources simultaneously.

Mono LED
Lets you know when you are in mono.

Mini-Jack
Mini 3.5mm (1/8”) TRS headphone output is used to check the signal from the digital source for trouble shooting. Works with ear-buds and standard headphones. 

USB Type-B Port
Connects from the PC or Mac. This delivers the digital audio signal and power to the USB-Pro which automatically recognizes the format.

Power LED
Lets you know that the USB-Pro is receiving power from the USB port.

Bookend Design
Creates a protective zone around the jacks and switches.

Ground Lift
Used to help eliminate hum and buzz caused by ground loops. Lifts pin-1 on both XLRs.

XLR Outputs
Standard XLR male outputs follow the AES format with pin-1 ground, pin-2 hot, pin-3 cold. 

No-Slip Pad
Provides electrical & mechanical isolation and keeps the unit from sliding around.

Isolation
Switches used to insert isolation transformers into the audio signal path to help eliminate hum and buzz caused by ground loops.

SPECIFICATIONS

Audio circuit type: Custom decoder with analog line drive
Frequency response: 5Hz ~ 40kHz (30Hz ~ 18kHz with isolation)
Dynamic range: >90dB
Gain: +8dBu
Total harmonic distortion: 0.01%
Output Impedance: 250Ω nominal
Noise Floor: -90dB
Maximum Output: +8dBu
Combatibility: Software compatibility: Windows XP/Vista/Win7/Win8/Win10 and Mac OS, Sound file compatibility: WDM, MME, CoreAudio, DirectSound, WASAPI and .WAV
Features: Mono Sum, Ground lift, Level Control, Headphone
Input Connectors: USB connector B-type
Output Connectors: 2 x XLR-M, 3.5mm headphone output
Extras: USB 1.1 full speed, Sampling Rate: 44.1kHz / 48kHz / 96kHz auto sensing, 75dBu stereo separation
Construction: 14-gauge steel
Size (L x W x D): 5.0" x 3.3" x 2" (127 x 84 x 48mm)
Weight: 1.5 lb (0.68kg)
Power: USB bus powered 500mA maximum
Conditions: For use in dry locations only between 5°C and 40°C
Warranty: Radial 3-year, transferable