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Features of Bosch LBB1925/10 Pre-amplifier System
- Bosch LBB 1925/10 Plena System Pre-Amplifier
- 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
- Warranty 12 Months.
SPECIFICATIONS:
Brand BOSCH View all BOSCH Products
Modeal No: LBB 1925/10
Type Bosch Plena System Pre-Amplifier View all Plena System Pre-Amplifier Products
Electrical
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
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 3x
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 1x
Connector Cinch, 2 x mono
Nominal level 350 mV
Impedance <1 kohm
Headphone output 1x
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 1x
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 1x
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
Mechanical
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
Environmental
Operating temperature -10 ºC to +55 ºC (14 ºF to +131 ºF)
Storage temperature -40 ºC to +70 ºC (-40 ºF to +158 ºF)
Relative humidity <95%
Warranty: 1 year