Master & Sub-Master Stations


MS301 Master Station

The MS301 is a 3-circuit Master Station with a unique hybrid configuration. Microprocessors operate all the switching, routing, and supervision functions while both the audio path and the core power supply remain analog. The result is a station with unrivaled flexibility, muscular reliability, and clean, smooth audio.
Supervision functions include the individual monitoring of each circuit for faults, and reporting such by front panel LEDs.
The 3 circuits can be operated independently or linked in A+B and A+B+C modes. All electronic “housekeeping” functions such as maintaining proper termination impedance are handled automatically.
The MS301 can be used with a headset or handset or may operated in hands-free mode by plugging in an accessory close-talking, noise-canceling goose-neck microphone (available separately) and adjusting sidetone for deep suppression.
Each MS301 circuit can be used either in intercom communications mode or in IFB mode with program ducking.
Program audio can be directed to each circuit, and be independently controlled and visually monitored.
An accessory to the MS301 is the MSM301 which adds 3 additional circuits (D, E and F) all of which have the same capabilities as the original 3.
The MS301 is compatible with most other 200ohm unbalanced party-line intercom devices.

Technical Information

MS300 Master Station

For those who do not require all the capabilities of the MS301, we offer the MS300. It has all the features and qualities of the MS301, without the IFB, Paging and Auxiliary Audio functions, resulting in considerable cost savings.

Technical Information

MSM301 3-Circuit Add-on

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.

Technical Information

RSM300 Remote Sub-master

The RSM300 is a sub-master station powered by the system’s master station (MS301) and is connected to one or more of the MS301’s communications circuits. There are a variety of ways in which it may be used. The most common is to provide the manager of a sub-group of the technical staff with an RSM300, provide a connection to the Master Station, and have the rest of the sub-group connected to the RSM300. In this way communications among the members of the sub-group are selective to themselves and do not add to the cumulative clutter on one of the main circuits. Because the RSM300 has 3 circuits and is using only one to communicate with the Master Station, it can have two separate sub-groups of its own. For example, a Lighting Director may want to have his automated lighting staff on one circuit, and the follow-spot operators on another.
A second application for the RSM300 is to provide one or more sub-masters which include all of the circuits and functions of the MS301 Master Station, lacking only the ability to control the distribution of Program Audio. This is done by simply connecting each of the circuits of the RSM300 to one of the circuits of the MS301 where each will share communications with the stations connected to that circuit. The operators would be sharing the activities of the main director. This could be useful in a very large system where the Main Director has assistants who have physically different positions and views. This could be true in a competition, or any event where judging is taking place.

Technical Information