Multiplex Distribution Amplifier (Alice Soundtech) is a 1U, 19-inch rack-mounted analog distribution unit that provides six buffered MPX outputs from a single input. Front-panel level adjustment yields a gain range from -10 dB to +20 dB. Input and output are BNC connectors. It operates from 85–285 V AC and draws 20 VA. Variants: 75 Ω (SKU 205131) and 50 Ω (SKU 205553). It is used to feed main and standby transmission systems and monitoring equipment.