Bosch Plena LBB 1925/10 Six-Zone Pre-Amplifier

£603.00 ex VAT.


The Bosch Plena LBB 1925/10 is a Six-Zone Preamplifier Mixer fulfilling a broad variety of Public Address requirements at a surprisingly low cost. It can provide dual-channel operation for simultaneous calls and BGM for up to six different zones.

Two input channels are provided for paging microphone call stations, alongside a universal input for Mic/Line with speech-optimized Tone Control & 3 inputs for BGM selection-optimized music. For clarification purposes: Background music and call station zone selection appears on the front-facing section of the LBB1925/10.

Product Features:

  • Three inputs for BGM selection
  • Six-zone Preamplifier – single or dual channel operation
  • Universal input for Mic/Line, with speech-optimized tone control
  • Front panel zone selection for BGM; Call station zone selection for calls
  • PC & Trigger inputs for automated calls, alarm tones and chimes to selected zones


LBB 1925/10

Frequency Response (+1/-3dB)

50 Hz – 20 kHZ

Inrush Current

1.5A @ 230V AC
3A @ 115V AC

Power Consumption

25 VA

Priority Mute

>40 dB


Bass Control: 10 dB @ 100 Hz
Treble Control: ±10 dB @ 10 kHz


>40 dB

Phantom Power Supply

16V via 1.2 kOhm – in mic

Master/Music Output

  • 3-pin XLR, balanced

Headphone Output

  • 6.3 mm jack stereo, signal mono


Standalone; 19” rack


100 mm H x 430 mm W x 270 mm D


Approx: 5 kg

Data Sheets

Data Sheet

Additional information




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