Bosch LBB1925/10 Plena 6 Zone Pre-Amplifier
Key Features
Product Description
The Bosch LBB1925/10 is a professional 6-zone system pre-amplifier designed for public address (PA) and background music distribution in commercial installations. It supports single-channel or dual-channel operation, allowing simultaneous paging and background music across up to six independent zones for flexible audio management.
The unit features two call station inputs, one universal microphone/line input with phantom power, and three background music (BGM) inputs with front-panel source selection. It also includes speech-optimized and music-optimized tone controls, PC and trigger inputs for automated announcements and chimes, and an emergency input with VOX priority override to ensure critical messages are broadcast immediately.
Designed in a 19-inch, 2U rack-mount chassis, the LBB1925/10 is ideal for schools, offices, hotels, shopping malls, factories, warehouses, airports, railway stations, places of worship, and other commercial PA systems requiring reliable multi-zone paging and background music distribution.
Specification
| Details | |
|---|---|
| Model | Bosch LBB1925/10 |
| Product Type | 6-Zone System Pre-Amplifier |
| Zones | 6 Independent Speaker Zones |
| Operating Mode | Single or Dual-Channel |
| Call Station Inputs | 2 × Call Station Inputs |
| Microphone / Line Input | 1 × Balanced Mic/Line Input (XLR/DIN) |
| BGM Inputs | 3 × Stereo RCA Inputs (Converted to Mono) |
| PC Input | 1 × Stereo RCA |
| Master Output | 1 × Balanced XLR |
| Tape Output | 2 × RCA (Mono) |
| Headphone Output | 6.3 mm Stereo Jack (Mono Signal) |
| Frequency Response | 50 Hz – 20 kHz (+1/-3 dB) |
| Total Harmonic Distortion (THD) | <0.5% |
| Signal-to-Noise Ratio | >63 dB (Mic), >70 dB (Line/BGM) |
| Phantom Power | 16 V DC (Microphone Mode) |
| Speech Filter | High-Pass, -3 dB @ 315 Hz |
| Tone Controls | Independent Bass & Treble Controls for Call & BGM Channels |
| Emergency Input | Balanced XLR with VOX Priority |
| Power Supply | 115/230 V AC, 50/60 Hz |
| Backup Power | 24 V DC |
| Power Consumption | 50 VA |
| Dimensions (H × W × D) | 100 × 430 × 270 mm (19-inch, 2U Rack Mount) |
| Weight | Approx. 5 kg |
| Mounting | Desktop or 19-inch Rack Mount |
| Color | Charcoal |
| Operating Temperature | -10°C to +55°C |
| Storage Temperature | -40°C to +70°C |
| Relative Humidity | <95% |
| Included Accessories | Power Cord, 19-inch Rack Mount Brackets, Installation & User Manual |