BOSCH LBB1938 Power Amplifier
SKU: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 |
|---|
Related products
-
Bosch PRS-CSR Call Station Remote
65,500৳Add to cartThe PRS-CSR is a call station with the same functionality as the basic call station, LBB 4430/00, but it uses CAT-5 cable for its connection to the Praesideo network. It connects, one-to-one, to the call station interface, PRS-CSI, which is part of the Praesideo optical network.
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.
The PRS-CSR can be extended with up to 16 keypads (LBB 4432/00 or LBB 4434/00), each with eight programmable keys. Extension with a numeric keypad (PRS-CSNKP) is also possible.
-
BOSCH PLE1CS Plena Call Station With 6 Zones
48,800৳Add to cartThe BOSCH PLE1CS Plena call station paging microphone is a stylish design high-quality call station with a stable metal base, a flexible microphone stem, and a unidirectional condenser microphone. The LBB1956/00 can make calls to selected zones (one to six and all-call) in a public address system built with the Plena Voice Alarm System. In addition to tabletop use, the special design allows it to be neatly flush-mounted on desktops.
- Stylish six-zone call station for the Plena Voice Alarm System
- Uni-directional condenser mic on a flexible stem
- Six zone selection keys, all-call key, and momentary PTT-key for calls
- Selectable gain, speech filter, limiter, and output level for improved intelligibility
- LED indications for zone selection, fault, and emergency state
- Call station extension provides seven additional zone and zone group keys
- Allows connection of expansion keypad LBB1957
-
Bosch Dicentis DCNM-HDMIC
Read moreThe Bosch DCNM-HDMIC is a discreet plug-in microphone for the Bosch Dicentis wireless discussion devices – DCNM-WD and DCNM-WDE.
The unobtrusive design enables a clear and unobstructed view of the meeting room and two precisely positioned capsules give a high-directive response, ideal for noisy conditions.
The DCNMHDMIC has low susceptibility to interference from mobile phones and red or green illuminators indicate whether the microphone is active (red) or whether the request-to-speak is accepted.
- Discrete microphone for user convenience
- High directive response
- Low susceptible for mobile phones Ultra low noise
- Freedom of movement
Call for Price
-
BOSCH CCSD CURD Conference Control Unit
Read moreThe Bosch CCSD-CURD is the advanced control unit for the Bosch CCS-1000D digital conference system which includes MP3 recording facility and digital acoustic feedback suppression.
- Plug-and-play functionality for quick and easy connection of up to 80 Discussion Devices
- Intuitive web browser control for advanced configuration and control
- Built‑in MP3 recorder with internal memory and USB recording
- Built‑in Digital Acoustic Feedback
- Built‑in Digital Acoustic Feedback Suppression (DAFS) for ensuring superior speech intelligibility
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.
Call for Price
Reviews
There are no reviews yet.