Radial Engineering Ltd.
USB-Pro™
True to the Music
®
FEATurE SET
1. LEVEL: Used to set the overall output level.
2. MONO: Sums the stereo signal to mono. When active, the LED
indicator illuminates. Mono mode reduces the channel count on
the PA or lets you send the signal to two separate audio systems
simultaneously.
3. HEADPHONE: Mini 3.5mm (1/8”) TRS headphone output is used to
check the output from the digital source for trouble shooting. Works
with ear-buds and standard headphones.
4. USB PORT: Connects from the PC or Mac using a TYPE B cable. This
port delivers the digital audio signal and power to the USB-Pro which
automatically recognizes the sample rate and bit depth.
5. POWER LED: This indicator will illuminate when the power is received
from the USB connection.
6. LEFT XLR OUT: Standard XLR male output follows the AES format
with pin-1 ground, pin-2 hot, pin-3 cold.
7. GROUND LIFT: Used to help eliminate hum and buzz caused by
ground loops. Lifts pin-1 on both XLR outputs.
8. RIGHT XLR OUT: Standard XLR male output follows the AES format
with pin-1 ground, pin-2 hot, pin-3 cold.
9. ISOLATION: Switches on side panel for each channel lets you insert
transformer isolation when needed. Use to eliminate hum and buzz
caused by ground loops.
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