E Building Technologies
Bengaluru, Karnataka
Send SMS
Send E-mail

System Pre Amplifier

Offering you a complete choice of products which include lbb 1925/10 bosch plena system pre-amplifier.

LBB 1925/10 Bosch Plena System Pre-Amplifier

LBB 1925/10 Bosch Plena System Pre-Amplifier
Get Best Quote
Approx. Rs 28,497 / PieceGet Latest Price

Product Details:
DistortionLess than 0.5%
Channel SeparationMore than 70 dB @ 1 kHz
Priority MuteMore than 40 dB
Dynamic Range100 dB
Weight Approx5 kg
MountingStandalone, 19" rack
Battery Voltage24 VDC, +10% / -15%
Frequency Response50 Hz to 20 kHz (+1 / -3 dB)
Connectors5-pin DIN, 3-pin XLR, balanced, with phantom power
Max Power Consumption25 VA
Current Max1 A
Current Inrush230/115 VAC, 1.5/3 A
Dimensions100 x 430 x 270 mm(H x W x D) (19" wide, 2U high)
Treble Control+/-10 dB @ 10 kHz
Sensitivity1 mV (mic), 200 mV (line)
Operating Temperature-10 deg C to +55 deg C (14 deg F to +131 deg F)
Storage Temperature-40 deg C to +70 deg C (-40 deg F to +158 deg F)
Bass Control+/-10 dB @ 100 Hz
Model NumberLBB 1925/10
Voltage230/115 VAC, +/-15%, 50/60 Hz

The Plena system pre-amplifier is a versatile, highperformance 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.

  • 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

  • The call channel provides two inputs for the Plena call stations, LBB 1941/00 (all-call) or LBB 1946/00 (sixzone), 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.
  • The 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.
  • An emergency/telephone input with signal level detector (VOX) and volume preset has the highest priority to all zones.

Certifications and approvals:
  • Safety: acc. to EN 60065
  • Immunity: acc. to EN 55103-2
  • Emission: acc. to EN 55103-1

  • 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

Additional Information:
  • Item Code: LBB1925-10
Yes! I am Interested
View PDF
Explore More Products
Looking for “System Pre Amplifier”?
Find Us M R Rajasimhan (Proprietor) 488, 5th A Main, 11th Cross, WOC 2nd Stage, Nagapura, Bengaluru - 560086, Karnataka, India
Share Us: