The Wohler Technologies AMP1 DA audio monitor provides self powered, full fidelity stereo monitoring in the smallest rack space possible 1U . The unit features two selectable AES input sources on unbalanced BNC connectors and a stereo analog input source on two balanced XLR connectors, 2 position AES source select switch, 2 position D A source select switch, and two 26 segment high resolution tri color LED bargraph level meters. A pair of balanced XLR connectors output the selected audio source for connection to downstream equipment. The level meters may be adjusted for a number of parameters, including Display Mode, Peak Hold, PPM Ballistics, Alternate Scales, and Phase Correlation via rear panel and internal DIP switches