The ST-UBA2 is used in any application requiring conversion from unbalanced consumer format signals to professional 4 dBu. It may be used to balance audio from CD players, cassette decks, computer sound cards, televisions, and a wide variety of other unbalanced sources. The mono sum output may be used to drive patch-bay jacks, monitors or subwoofer amplifiers.

Separate Dual-LED VU metering is provided for the left and right outputs. A green LED illuminates at 15 dB below 4 dBu. The intensity of the green LED progresses from minimum at -11 dBu to full intensity at 4 dBu. The adjacent red LED illuminates at 4 dBu.