Bosch LBB1925/10 pre amplifier

Name: Bosch LBB1925/10 pre amplifier
Brand: Bosch
SKU: 15047
Availability: InStock

₹65,808.45 Price excluding tax

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6-Zone PA pre-amplifier for paging and BGM
Clear speech with speech-optimized audio
3 BGM inputs for multiple music sources
Phantom power support for condenser microphones
Priority paging automatically mutes background music
Bass & treble tone controls for perfect sound
Emergency and interconnect inputs for alarms
Front-panel controls for volume, tone, and zones
Rack or table mountable (2U height)

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Description
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The Bosch LBB1925/10 Plena System Pre-Amplifier is a reliable and professional PA system controller designed for paging, background music, and emergency announcements in commercial and institutional installations. It allows smooth control of multiple audio sources across six independent zones, making it ideal for large buildings and multi-area facilities. This pre-amplifier supports microphones with phantom power, multiple BGM inputs, and priority paging, ensuring clear speech and automatic muting of background music during announcements. The built-in speech-optimized tone controls help deliver excellent voice clarity, even in noisy environments.

What is the Bosch LBB1925/10 used for?

A-1 It is used as a PA system pre-amplifier for paging, background music, and emergency announcements in multi-zone installations.

How many zones does this pre-amplifier support?

A-2 The Bosch LBB1925/10 supports six independent audio zones.

Can I connect microphones and music sources together?

A-3 Yes, it supports microphone inputs with phantom power and three BGM line inputs simultaneously.

Is it compatible with Bosch Plena amplifiers?

A-4 Yes, it is fully compatible with Bosch Plena power amplifiers and call stations.

Is this suitable for emergency announcement systems?

A-5 Yes, it includes priority muting and emergency/interconnect inputs, making it suitable for emergency PA systems.

Specifications

Product Type	6-Zone Pre-Amplifier for PA Systems
Application	Public Address, Paging, Background Music, Emergency Announcements
Mains Power Supply	230/115 VAC ±15%, 50/60 Hz
Current Inrush	1.5 A / 3 A (depending on voltage)
Max Power Consumption	~25 VA
Battery Backup	24 V DC, +10% / -15%
Max DC Current	~1 A
Frequency Response	50 Hz – 20 kHz (+1/-3 dB)
Total Harmonic Distortion (THD)	< 0.5 %
Channel Separation	> 70 dB @ 1 kHz
Dynamic Range	~100 dB
Priority Mute	> 40 dB (automatic BGM muting for paging)
Bass Control	± 10 dB @ 100 Hz
Treble Control	± 10 dB @ 10 kHz
Speech Filter	High-pass –3 dB @ 315 Hz, 6 dB/oct
Mic/Line Input	1 × balanced (5-pin DIN / 3-pin XLR) with phantom power
Sensitivity	~1 mV (mic), ~200 mV (line)
Input Impedance	> 1 kΩ (mic), > 5 kΩ (line)
BGM Line Inputs	3 × RCA (stereo converted to mono)
S/N Ratio	> 63 dB (mic), > 70 dB (line)
Master Output	1 × balanced XLR, ~1 V nominal
Tape Output	1 × RCA (2 mono) ~350 mV
Headphone Output	6.3 mm jack (mono) ~3 V
Zone Relays / Contacts	5 A @ 250 V, 8 A current
Emergency / Interconnect Inputs	Balanced XLR with adjustable sensitivity
Independent Zones	6 zones for BGM and paging
Call Station Inputs	2 channels
Front Panel Controls	Volume, tone, zone selection, priority, source selection
Trigger & PC Inputs	For automated chimes, alarms, and external control
Mounting	Standalone or 19″ rack mount (2U height)
Dimensions (HxWxD)	100 × 430 × 270 mm
Weight	~5 kg
Operating Temperature	−10 °C to +55 °C
Storage Temperature	−40 °C to +70 °C
Relative Humidity	< 95 %