A professional active press box drive unit (Audio Splitter) serving as a drive unit for AudioPressBox expanders. It features 4 MIC/Line Inputs (A,A+B,B) . What is more, it can also be used for bilingual conferences as it features 2 separate channels A and B. Each input can be routed to channel A or channel B or both at the same time. It  serves as a drive unit because it has 4 buffered expander Outputs (2x A and 2x B) and can power additional 96 Line/MIC Outputs.