Radial USB-Pro

The Radial USB-Pro is a stereo USB direct box that delivers clean, professional laptop audio to any sound system. Instead of running a noisy headphone output into the mixer, connect your Mac or PC over USB and the USB-Pro’s high-performance 24-bit/96 kHz converter produces a pristine stereo signal on two balanced XLR outputs, with isolation to eliminate hum and buzz. It’s ideal for presentations, playback, worship, DJs, and live streaming.

Highlights

• Stereo USB laptop DI for Mac and PC
• High-performance 24-bit/96 kHz digital-to-analog converter
• Two balanced XLR outputs for long, quiet cable runs
• Switchable isolation to eliminate ground-loop hum
• 3.5 mm headphone output to check signals
• Driverless, plug-and-play setup

Radial USB-Pro: The Right Way to Connect a Laptop

A laptop’s headphone jack is unbalanced, low quality, and prone to buzz, hum, and interference, especially when the computer is plugged into power. The USB-Pro bypasses the internal sound card entirely, taking digital audio over USB and converting it with a high-quality converter, so your sound system gets clean, full-range audio.

Quiet, Balanced Outputs

Two balanced XLR outputs connect directly to a mixer or stage box and stay noise-free over long cable runs. Switchable isolation breaks ground loops between the computer and the sound system, eliminating the hum common with laptop setups.

Setting Up the USB-Pro

Connect the USB-Pro to your computer with a USB cable; it installs automatically with no drivers. Select it as your audio output device, connect the XLR outputs to your mixer, and use the headphone output to confirm the signal before sending it to the PA.

What to Pair With the USB-Pro

Pair the USB-Pro with XLR cables, a mixer or stage box, a laptop stand, and a USB extension if the computer sits away from the stage.

Where to Use It

The USB-Pro belongs in every auditorium, conference room, church, and classroom where computers play video, music, or presentations. DJs, worship teams, and theater productions use it for reliable playback and backing tracks.

Studio Uses

In the studio, the USB-Pro provides a clean way to send computer audio to outboard gear, monitors, or a console, and the headphone output makes quick checks easy.

Built Radial Tough

Like all Radial direct boxes, the USB-Pro is built in a durable steel enclosure designed for years of reliable use on stage and in installations.

Tips for Reliable Playback

Turn off system sounds and notifications on the computer before a show, set the USB-Pro as the default output device, and keep the computer’s volume at maximum while controlling level at the mixer for the best signal-to-noise ratio. Test the headphone output before sending audio to the PA.

Why Balanced Outputs Matter

Balanced XLR connections reject interference picked up along the cable, so they stay quiet over long runs from a laptop at the stage to a mixer at the back of the room. That’s a major upgrade over unbalanced headphone-to-RCA or 1/8-inch adapter cables.

Radial USB-Pro FAQ

Does it need drivers? No. It installs automatically on Mac and PC.

Why not just use the headphone jack? The USB-Pro bypasses the noisy internal sound card and provides balanced, isolated outputs for clean audio.

Radial USB-Pro Specifications at a Glance

• Type: stereo USB direct box
• Converter: 24-bit/96 kHz
• Outputs: 2 balanced XLR
• Isolation: switchable
• Monitoring: 3.5 mm headphone output
• Connection: USB, driverless

Who Buys the Radial USB-Pro

• Churches and worship teams
• Schools and conference rooms
• DJs and playback engineers
• AV installers and rental companies

Why Buy the Radial USB-Pro From Metro Sound & Lighting

Metro Sound & Lighting isn’t a catalog-only retailer. We design, install, and service sound systems in-house, so our team can help you connect computers to your system cleanly and support it after the sale. We offer B2B and integrator pricing for churches, schools, and venues.

Browse more options in our Direct Boxes category, or see the full specifications on the official Radial USB-Pro product page.