Pro Intercom MS300 3-Circuit Wired Intercom Master Station

Info

The MSM301 is an accessory to the MS301. When connected by its single cable, it adds 3 more circuits, for a total of 6, to the MS301. The new circuits have all the functions of the original three, and are operated in the same manner. The MSM301 is powered by the MS301 and so does not add extra power to the system. It does allow the operator to communicate independently with three more circuits. Because each circuit of the MS301 and the MSM301 are capable of being either intercom or IFB channels, the need for a whole separate IFB system may be eliminated. The MSM301 occupies one rack space.

Three circuits
Each circuit can be intercom or IFB in any combination
Circuits are linkable (A + B) or (A + B + C) with auto termination impedance adjustment
Each circuit's termination can be lifted via rear panel DIP switches
Independent level control of program audio output for each circuit with an LED VU meter for each
Mic switch on each circuit can be tapped for locking or held and released for momentary
Internal power supply is linear (except for microprocessor functions) with 2.4A continuous output
Toroidal transformer with extensive monitoring and auto-control of overload and heat considerations
Full duplex, hands-free operation, in moderately noisy environments. (with optional gooseneck mic.)
Paging output (balanced and isolated) on rear panel activated by front panel momentary button
Dry contacts on rear panel also closed by page button
Front panel 4-pin XLR may be used for gooseneck mic. or headset
Gooseneck or headset mic. may be dynamic or electret. Lighted front panel switch sets choice
Front panel green LED indicates presence of 24VDC across the three circuits
Three front panel flashing red LEDs report trouble status of each circuit. Other circuits are not affected
System resets when the problem is repaired
While switching is all electronic, the audio paths remain analog providing comfortable long-term listening
A front panel button initiates 'Override' which overrides front panel controls on LS2 and LS3 loudspeaker stations, restoring preset volume and status.