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LBB 1925Plena System Pre-Amplifier
System Pre-Amplifier
Plena System Pre-Amplifier
LBB 1925Plena System Pre-Amplifier
System Pre-Amplifier
Plena System Pre-Amplifier

BOSCH LBB1925/10 Plena System Pre-Amplifier

(4 customer reviews)
BOSCH
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  •  Six-zone system pre-amplifier, with single or dual channel operation
  •  Two input channels for call stations
  •  Universal input for microphone/line, with speech optimized tone control
  •  Three inputs for BGM selection and music optimized tone control
  •  Front panel zone selection for BGM and call station zone selection for calls

₹52,375.00 ₹79,475.00 Excluding Tax

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BOSCH LBB1925/10 Plena System Pre-Amplifier is a versatile, high- performance unit with call and mono BGM
(background music). It fulfills a wide 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, using two Plena amplifiers.
The call channel provides two inputs for the Plena call stations, LBB 1941/00 (all-call) or LBB 1946/00 (six- zone), with loop-through capability, and universal, balanced input. One is a 3-pin XLR connector for microphone or line level (selectable), and the other is a 5-pin DIN-connector with all call priority contact, which may also be used to start one of the available chime attention signals.
The microphone input has a selectable speech filter for improved intelligibility, a volume control, and bass and treble tone controls with shelving characteristics optimized for speech. The call channel is available on the balanced XLR master output.
BOSCH LBB1925/10 Plena System Pre-Amplifier BGM channel provides three inputs on stereo cinch-connectors, converted to mono, with front panel selection, volume control and bass and treble tone controls with shelving characteristics optimized for music. The BGM channel has a direct output on balanced XLR for dual channel operation. It can also feed the master output, with the lowest priority, for single channel operation. Zone selector switches on the front panel control the BGM routing. An overload protected 24 VDC output provides power for driving external relays, often making an external power supply unnecessary.
SKU: LBB1925/10 Category: Tag:

LBB 1925/10

Brand

Technical specifications

Mains power supply
Voltage 230/115VAC, ±15%, 50/60 Hz
Current inrush 230/115 VAC, 1.5/3 A
Max power consumption 25 VA
Battery power supply
Voltage 24 VDC, +10% / -15%
Current max 1 A
Performance
Frequency response 50 Hz to 20 kHz (+1 / -3 dB)
Distortion <0.5%
Bass control ±10 dB @ 100 Hz
Treble control ±10 dB @ 10 kHz
Channel separation >70 dB @ 1 kHz
Priority mute >40 dB
Dynamic range 100 dB
Mic/line input 1 x
Connectors 5‑pin DIN, 3‑pin XLR, balanced, with phantom power
Sensitivity 1 mV (mic), 200 mV (line)
Impedance >1 kohm (mic); >5 kohm (line)
S/N (flat at max volume) >63 dB (mic); >70 dB (line)
S/N (flat at min volme/muted) >75 dB
CMRR >40 dB (50 Hz – 20 kHz)
Headroom >25 dB
Speech filter -3 dB @ 315 Hz, high-pass,

6 dB/oct
Phantom power supply 16 V via 1.2 kohm, (mic mode only)
Line input 3 x
Connector Cinch, stereo converted to mono, unbalanced
Sensitivity 200 mV
Impedance 22 kohm
S/N (flat at max volume) >70 dB
S/N (flat at min volume/ muted) >75 dB
Headroom >25 dB
Master output 1 x
Connector 3-pin XLR, balanced
Nominal level 1 V
Impedance <100 ohm
Tape output 1 x
Connector Cinch, 2 x mono
Nominal level 350 mV
Impedance <1 kohm
Headphone output 1 x
Connector 6.3 mm jack stereo, signal mono
Nominal level 3 V
Impedance <100 ohm
Zone relays 5 A
Contacts voltage 250 V
Contacts current 8 A
Interconnection input / emergency 1 x
Connector 3-pin XLR, balanced
Sensitivity 200 mV (interconnection),

100 mV to 1 V adjustable (emergency)
Impedance >10 kohm
VOX threshold 45 mV (emergency)
Interconnection output 1 x
Connector 3-pin XLR, balanced
Nominal level 200 mV
Impedance <100 ohm
Relay contacts 30 V, 1 A
DC supply output voltage 24 V, 250 mA max
Dimensions (H x W x D) 100 x 430 x 270 mm (19″ wide, 2U high)
Weight Approx. 5 kg
Mounting Standalone, 19″ rack
Color Charcoal

Based on 4 reviews

4.5 overall
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  1. Gomathi –

    I am using forthe past 8 months Plena Amplifier . Elegant design and very good build quality. Sakthi Av Tronics service was very satisfactory an all the staffs
    were very polite.

    Gomathi –

  2. Durga Devi –

    Awesome product purchased from Sakthi AV Troncis Bosch Plena Amplifier . I am using for many months. No issues and the price was also affortable.

    Durga Devi –

  3. Ananthu –

    LBB 1925/10 Plena System Pre-Amplifier is very Good. I didn’t except the quality of the product.
    I got lowest price from Sakthi AV Tronics

    Ananthu –

  4. Krishna Prasad –

    Bosch Plena System Pre-Amplifier
    Quality is Awesome. Got very Lowest Price from Sakthi AV Tronics.

    Krishna Prasad –

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