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BOSCH LBB 1965/00 Plena Message Manager
117,000৳
The Plena message manager is a high-performance, highly versatile stand-alone digital message player. Applications range from spot announcements in supermarkets and theme parks to warning and evacuation messages in emergency situations.
BOSCH LBB 1965/00 Plena Message Manager Specs:
Messages
Up to 12 messages can be stored in the internal 64Mbit EEPROM, without the need for data retention battery backup. Each message can have any length within the total available capacity. A PC uploads messages and configurations via RS-232 to the unit, which can then operate without a PC.
The standard WAV format is used for messages with sample rates of 8 kHz to 24 kHz with 16-bit word length (linear PCM). This gives up to 500 seconds of recording time with a CD‑quality signal-to-noise ratio. The use of linear PCM instead of a compressed audio format, such as MP3, ADPCM, and u-law/A-law, ensures high-quality playback of all types of audio signals, including sound effects and special tones, such as attention chimes.
The unit has 12 contact closure trigger inputs for announcements. Each can be configured for a sequence of up to four messages from those available. In this way messages can be used in combination with other messages, optimizing flexibility, and storage space usage. When used together with the six-zone LBB 1925/10 Plena System Pre-Amplifier, a zone selection can be configured for each trigger input. The message manager communicates this selection to the LBB 1925/10 via an RS-232 connection. Continuous activation of a trigger input causes the corresponding message sequence to repeat.
Trigger Inputs
The trigger inputs have a serial priority, i.e., input 1 has priority over input 2, input 2 over input 3, etc. The high-priority trigger inputs 1-6 are only accessible as contacts on the rear panel to prevent accidental use. The lower priority trigger inputs 7-12 are also available as trigger switches on the front panel.
Integrity and Dependability
The LBB 1965/00 can also play emergency/evacuation messages, as it fulfills the IEC 60849 standard. The microcontroller continually checks the data integrity of the system, and a watchdog circuit, in turn, checks the microcontroller. The unit monitors the D/A converter with a pilot tone and the high-priority trigger inputs (one to six) for cable short circuits and breaks. A 24 V battery backup connection with automatic fail-safe provides continued operation if the mains power should fail. A 20 kHz pilot tone can be mixed with the output signal to supervise the link to the next amplifier. This also works for loudspeaker supervision in combination with 20 kHz detectors. Any failure causes a red LED fault indication and activates a fault output contact.
Loop-through Facility
The LBB 1965/00 provides a loop-through facility with balanced XLR and unbalanced cinch inputs and outputs. This allows the unit to be inserted into an existing audio link. As long as no announcements are playing, the signal input is routed to the output. If an announcement begins, the input signal is interrupted and the announcement is routed to the output.
Updating
Messages and configuration settings are uploaded from a PC. After uploading, the trigger inputs 7-12 can be configured by using the front panel switches, without the need for a new upload or even a PC. Message content can be monitored using the available headphone jack.
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133,000৳Add to cartThe Bosch LBB 1938/20 is a powerful 480 W power amplifier in a 3U high 19”case for rack mounting or tabletop use.
LEDs on the front panel of the LBB1938/20 show the status of the amplifier: power, audio output level, and supervised functions.
This high performance unit fulfills a wide range of public address requirements at a surprisingly low cost.
There are two separate priority controlled 100 V outputs for zones that only need announcements made via the priority input, and for zones that will not get any announcements made via the priority input.
Rack mounting brackets supplied.
- 480 watts
- Very high audio performance power amp
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- Temperature controlled fan
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- LED VU Meter
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- TÜV certified according to IEC 60849
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Easy to use, with simple zone labels included in the box as well as setting indicators which enable the installer to place colored markers on the volume and tone controls to indicate optimum and maximum recommended volume settings.
Despite its simplicity, the PLE 1MA030 still has flexible features such as ducking, priority paging, and voice-activated emergency override. 19″ rack mounting brackets are included should you wish to build into a 19″ equipment rack.
- 30 watt, 100-volt line
- Also compatible with 8-ohm speakers
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- RJ45 connection for remote wall plate WP3S2Z (see ancillary section)
- Contact closure and Vox priority
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- Plug-and-play functionality for quick and easy connection of up to 80 Discussion Devices
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With this advanced model, up to 8 hours of audio can be recorded to the internal memory, or up to 128GB (>4000 hours) onto an external USB device. The sophisticated ‘digital acoustic feedback suppression’ balances sound pressure levels and system gain to enable higher volumes without howling effects.
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