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.
