Radial Engineering USB-Pro Stereo USB Laptop Direct Box with Digital-to-Analog Conversion and Balanced Output Isolation

The Radial Engineering USB-Pro is a professional stereo USB direct box designed to connect computers directly to high-end audio systems with maximum clarity and reliability. Built for live sound, broadcast, and studio environments, it combines high-resolution digital-to-analog conversion with transformer-isolated outputs to deliver clean, consistent audio from any USB-equipped laptop or desktop.

At its core, the USB-Pro features 24-bit / 96 kHz digital-to-analog conversion, ensuring high-fidelity playback with detailed frequency response and low distortion. It converts USB audio signals into balanced analog outputs suitable for mixing consoles, PA systems, and recording interfaces, while maintaining full stereo imaging and dynamic range.

The unit includes transformer-isolated outputs to eliminate ground loops, hum, and electrical noise commonly associated with computer audio setups. A built-in headphone amplifier allows direct monitoring with independent level control, making it ideal for checking mixes, cueing tracks, or silent rehearsal setups.

Powered via USB, the USB-Pro is highly portable and requires no external power supply. Its rugged steel chassis ensures durability in demanding touring and production environments.

Key Features:

• Professional stereo USB direct box for laptops and computers
• High-resolution 24-bit / 96 kHz digital-to-analog conversion
• Transformer-isolated balanced outputs for noise-free signal transfer
• Built-in headphone amplifier with level control
• Eliminates hum and ground loop issues from computer audio
• USB-powered—no external power supply required
• Maintains full stereo imaging and dynamic range
• Rugged steel enclosure for touring and studio durability
• Ideal for live sound, broadcast, and recording applications