IFB Central Electronics Rack Mount (1RU), requires MA-704/AX-704 controllers or MS-812/IFB card option and IC-25-6 or similar Each IFB Controller handles up to four Talent Receivers. For use with MA-704 and AX-704 IFB Control Panels or intercom stations. This unit contains the circuitry for selecting one of two program sources, sending the program to the IFB channels, and interrupting it via the Talent Control Station. Variable audio program dip-level. Monaural or stereo/ split-feed outputs. Improved and intuitive user interface. Requires a 6-pin XLR cable for connection to MA-704/AX-704 control panels.  Powered by intercom power supply.