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BOSCH LBB1938 Power Amplifier
133,000৳
The 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
- Can be used to boost Plena Voice alarm systems with system monitoring
- XLR and jack input with XLR and Jack loop through outputs
- 100 volt line input. Ideal for remote location booster amps
- 100v, 70v and 8 ohm outputs
- 24v override relay output
- Temperature controlled fan
- AC and 24VDC operation
- LED VU Meter
- Dual inputs with priority switching
- Temperature controlled forced front to back
- Mains, battery back-up, and pilot tone supervision
- TÜV certified according to IEC 60849
BOSCH LBB1938 Power Amplifier Spces:
- Voltage: 230VAC, ±10%, 50/60 Hz
- Inrush current :19 A
- Max power consumption: 2200 VA
- Battery power supply
- Voltage: 24 VDC, +20% / -10%
- Current max: 30 A
Performance
- Output power (rms/maximum): 480 W / 720 W
- Power reduction on backup power: -1 dB
- Mains power supply
- Frequency response: 50 Hz to 20 kHz (+1/‑3 dB @ ‑10 dB ref. rated output)
- Distortion: <1% @ rated output power, 1 kHz
- S/N (flat at max volume): >90 dB
- Line inputs: 2 x
- Connector: 3-pin XLR, balanced
- Sensitivity: 1 V
- Impedance: 20 kohm
- CMRR: >25 dB (50 Hz to 20 kHz)
- Gain: 40 dB
- 100 V input: Connector Screw, unbalanced
- Sensitivity: 100 V
- Impedance: 330 kohm
- Line loop-through output 2 x
- Connector: 3-pin XLR
- Nominal level: 1 V
- Impedance: Direct connection to line input
- Loudspeaker outputs: 3 x
- Connector: Screw, floating
- Direct output: 100 V, 70 V, 8 ohm
- Priority only (from input 1): 100V or 70 V internally selectable
- Music (non-priority) only: 100V or 70 V internally selectable
Power consumption
Max power: 990 W
-3dB 715 W
-6dB 510 W
Pilot tone* 110 W
Idle 25 W
24 VDC operation
Max power 32 A (770 W)
-3 dB: 26 A (625 W)
-6 dB: 18 A (430 W)
Pilot tone*: 3.8 A (91 W)
Idle: 0.7 A (17 W)
* 20 kHz -20dB with maximum loudspeaker load
Mechanical
Dimensions (H x W x D): 145 x 430 x 370 mm / (19″ wide, 3U high, with feet)
Weight: Approx. 25 kg
Mounting: Standalone, 19”rack
Color: Charcoal
Brand |
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70,000৳Add to cartProduct Code: OTC2472
The PRS-CSI is an interface between a single remote call station, PRS-CSR, or a remote call station kit, PRS-CSRK, and the fiber optical Praesideo network. It uses CAT-5 cable for the connection to the remote call station. The CAT-5 cable, carrying digital audio and control data, can be as long as 1 km.
The length of the CAT-5 cable is not a part of the Praesideo optical network length. This considerably increases the overall possible length of the optical network, especially in cases, where the call station is located far from the rest of the system.
The call station interface can get its power from the Praesideo network, and/or from a local power supply. It is fully supervised. -
BOSCH LBB 1990/00 Plena Voice Alarm Controller
228,000৳Add to cartThe Plena LBB 1990/00 Voice Alarm Controller unit, is the heart of the voice alarm system. It is the basis of the Plena Voice Alarm System and has all the essential functionality for compliance with the EN54‑16 and EN60849 standards, including full system supervision, loudspeaker line impedance supervision, a supervised emergency microphone on the front panel, and a supervised message manager.
The LBB1990/00 enables messages to be merged to allow even more flexible use of pre-recorded announcements and evacuation messages. The controller can be used as a stand-alone system with up to six zones or expanded to up to 120 zones using additional six-zone routers.
Up to eight call stations can be connected. Interconnections are made using standard RJ45 connectors and shielded CAT-5 cable.
A built-in 240 W amplifier provides the power for the emergency call channel and BGM. Additional Plena Amplifiers can be added to provide two-channel operation. All amplifiers are supervised. The audio output uses standard analog audio 100 V line switching for full compatibility with the Plena family of public address equipment and Bosch EVAC-compliant loudspeakers. The system is configured using DIP switches for basic functionality and a PC for more advanced functions.
- Basic 6 zone system
- Expandable to 60 zones
- Up to 8 call stations can be connected
- Built-in 240 watt booster amp
- Digital message system
- Up to 255 pre-recorded messages and chimes/tones can be stored
- The emergency mic on the front panel
- 16 priority levels
- Individual BGM control for each zone
- Standard and emergency control in and outputs
- Additional Booster amps are supervised
- Can be set up using PC or via DIP switches
- Fully complies with IEC60849 and all national equivalents
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