The Bogen Multi-Graphic Series 2223R and 2233R Centralized School Sound Systems are complete, self-contained voice and program control centers for schools and institutions. They are available in configurations serving from 25 to 175 loudspeaker equipped locations. The control centers feature two-way intercom capability plus distribution of public address, program material, or emergency announcements. They are engineered to provide versatility and reliability, and include provisions for optional configurations, for maximum system flexibility.
The intercom channel is rated at 20 watts and features a frequency response shaped for maximum intelligibility. The intercom channel is completely independent communication between the control center and a classroom does not interfere with the distribution of program material to any other classroom. The Series 2223R provides one program channel, while in Series 2233R, two separate programs may be directed to different groups simultaneously. Step-by-step instructions with easy to follow color-coded guides are provided on the front panels, so that even inexperienced users are able to easily operate the system.
Emergency announcements require only the operation of a single push button, take precedence over all other functions, and are transmitted at a predetermined level.
The modular design of the Series 2223R and 2233R permits custom configuration to individual institutional requirements, while simplifying maintenance and service. Modular design permits an increase in system capacity, or the addition of Bogen options, to meet the changing needs of the facility.
The basic Series 2223R system components include the MCP35A control panel, SBA225 room selector and annunciator panels, and CR100A cassette player-FM/AM tuner. A power amplifier is included for the program channel when the room selector capacity exceeds 50 stations.
The Series 2233R utilizes the MCP35A control panel to provide separate amplified program channels. The SBA325 room selector and annunciator panel (three-channel) is used to distribute different programs to different groups of staff speakers simultaneously. The SBA325 panel also causes the associated room annunciator LED to flash when a call is acknowledged by the control center operator, as a reminder that the channel is open. Separate power amplifiers are provided for each of the program channels; the power ratings are based upon the total number of room selector switches in the system.
Call-in switches are used at staff locations to call the control center. LED and tone announce calls at the control center. Call-in switches with selective privacy prohibit monitoring of the classroom from the control center but permit the room to be called. An optional configuration uses telephone handsets and permits control center-to-classroom and classroom-to-classroom phone communications via the control center. Provisions are included for voice call-in and light annunciated call-in on two-conductor shielded cable.
The SCR25A accessory permits the use of existing call in switches, which do not contain SCR holding circuits.
Provisions are included to distribute a tone signal over all speakers, to announce classroom changes, etc. Other options include emergency paging from a telephone, interphone, or microphone, alarm signaling, loop priority (interface with satellite sound systems in gyms, etc.), expanders) to increase the number of microphone and/or auxiliary inputs and six-circuit time signaling.
The Series 2223R and 2233R systems are available in a 42″, 61-1/4″ or 77″ inch upright equipment rack.