Radial USB-PRO DI for Laptops with Level Control / Mono Summing / Headphone Out

The Radial USB-Pro™ is a 24-bit digital to analog audio converter and direct box that is designed to transfer digital audio files to a balanced mic level signal suitable for a PA system, recorder or broadcast feed. One merely connects a laptop computer to the USB-Pro using a standard USB type-B cable.

The USB-Pro derives its power from the USB connection and will automatically configure itself to most computers without the need for special drivers to be loaded. Audio may be tested using the front panel earphone outlet and adjusting the level to suit. A mono switch can be activated to test for phase issues or to send the output to two separate audio systems. Side access switches enable the user to introduce isolation transformers to eliminate hum and buzz caused by ground loops. This is supplemented with a ground lift switch that lifts pin-1 on the two XLRs. The USB-Pro can be used for audio playback, system testing and for transferring digital audio files to analog for processing.

FEATURES

• High Performance 24bit/96kHz digital audio converter
• Plug & Play, no drivers required
• 3.5mm headphone output to test signals
• Balanced XLR outputs to feed a mixer or PA

COOL STUFF

• Output Level to adjust both the main stero and headphones output signal levels
• Mono sums the signal to mono to reduce the channel count or feed two soures simultaneously
• Mono LED lets you know when you are in mono mode
• 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 recongnized the format.
• Power LED lets you know that the USB-Pro is receiving power from the USB port
• Standard XLR male outputs follow the AES format with pin-1 ground, pin-2 hot, pin-3 cold
• Ground lift used to help eliminate hum and buzz caused by ground loops. Lifts pin-1 on both XLRs
• Transformer isolation may be switched in on each channel to eliminate hum and buzz caused by ground loops
• Book end design creates a protective zone around the jacks and switches.
• No slip pad provides electrical and mechanical isolation and keeps the unit from sliding around.

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 converters. You merely connect to the mic inputs on your mixing console 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.