Pro Intercom MS300 - Master Station, 3-circuit

The Pro Intercom MS300 has all the features and qualities of the MS301, without the IFB, Paging and Auxiliary Audio functions, resulting in considerable savings in cost. Features • Three circuits rather than the usual two. • Circuits are linkable (A+B) or (A+B+C) with automatic termination impedance adjustment. • Each circuit's termination circuit can be lifted via rear panel DIP switches. • Mic switch on each circuit can be tapped for locking or held and released for momentary. • Internal power supply is linear (except for microprocessor supervision) with 2.4A continuous output. • Toroidal transformer with extensive monitoring and auto control of overload and heat considerations. • Full duplex hands-free operation with optional noise-canceling gooseneck microphone. • Dry contacts also closed by Page button. • Front panel XLR may be used for gooseneck microphone or headset. • Three front panel flashing red LEDs report trouble status of each circuit. Other circuits are not affected. • Front panel green LED indicates presence of 24VDC across the three circuits. • System auto resets when fault is removed. • While switching is all electronic, the audio paths remain analog for long term comfortable listening. • A front panel button activates 'Override' which overrides front panel settings on LS3 loudspeaker stations, restoring preset volume and settings. • Mic Select button chooses between dynamic or electret. • Built-in speaker with better than communications quality reproduction has On/Off and Volume controls. • Input voltages in the 120 and 240 Volt ranges. Selection and fusing on the rear panel. Brown out circuitry adjusts for lower than chosen voltage. • Standard 1U rack panel cabinet.