Bosch Appliances LBB 1925/10 manual

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Table of contents for the manual

  • Page 1

    Communications Systems | LBB 1925/10 Plena System Pre-Amplifier LBB 1925/10 Plena System Pre-Amplifier www.boschsecurity.com u Six-zone system pre-amplifier, with single or dual channel operation u Two input channels for call stations u Universal input for microphone/line, with speech optimized tone control u Three inputs for BGM selection and musi[...]

  • Page 2

    Each zone has a tri-state control on the front panel that can turn it off, switch it to the call channel, or to the BGM channel. The all‑call microphone input and emergency activation override the call station selection on the call channel. Each zone has separate priority overrides with preset volume levels. This assures an appropriate message vo[...]

  • Page 3

    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 convert[...]

  • Page 4

    4 | LBB 1925/10 Plena System Pre-Amplifier Represented by: Americas: Europe, Middle East, Africa: Asia-Pacific: China: America Latina: Bosch Security Systems, Inc. 12000 Portland Avenue South Burnsville MN 55337, USA Phone: +1-800-392-3497 Fax: +1-800-955-6831 audiosupport@us.bosch.com www.boschsecurity.com Bosch Security Systems B.V. P.O. Box 8000[...]