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Data sheet en_us_1886490251

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  • 1. Communications Systems | LBB 1925/10 Plena System Pre-AmplifierLBB 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 ▶ PC and trigger inputs for automated calls, alarm tones and chimes to selected zonesThe Plena system pre-amplifier is a versatile, high- The BGM channel provides three inputs on stereo cinch-performance unit with call and mono BGM (background connectors, converted to mono, with front panelmusic). It fulfills a wide variety of public address selection, volume control and bass and treble tonerequirements at a surprisingly low cost. It can provide controls with shelving characteristics optimized for music.dual channel operation for simultaneous calls and BGM The BGM channel has a direct output on balanced XLR forfor up to six different zones, using two Plena amplifiers. dual channel operation. It can also feed the master output, with the lowest priority, for single channel operation. Zone selector switches on the front panelFunctions control the BGM routing. An overload protected 24 VDC output provides power for driving external relays, oftenThe call channel provides two inputs for the Plena call making an external power supply unnecessary.stations, LBB 1941/00 (all-call) or LBB 1946/00 (six-zone), with loop-through capability, and universal, An emergency/telephone input with signal level detectorbalanced input. One is a 3-pin XLR connector for (VOX) and volume preset has the highest priority to allmicrophone or line level (selectable), and the other is a 5- zones. Two trigger inputs (contact closure) activate alarmpin DIN-connector with all‑call priority contact, which may or time signals to pre-selected zones. Many differentalso be used to start one of the available chime attention chime tones are available. A PC audio input with RS-232signals. control provides software controlled zone configuration, or automatic messaging in combination with theThe microphone input has a selectable speech filter for LBB 1965/00 Plena Message Manager. There are six levelsimproved intelligibility, a volume control, and bass and of priority available for BGM, microphone, call stations,treble tone controls with shelving characteristics trigger inputs and emergency input. A set of relays directsoptimized for speech. The call channel is available on the the amplifier output(s) to different loudspeaker groupsbalanced XLR master output. (zone switching). www.boschsecurity.com
  • 2. 2 | LBB 1925/10 Plena System Pre-AmplifierEach zone has a tri-state control on the front panel that Safety acc. to EN 60065can turn it off, switch it to the call channel, or to the BGM Immunity acc. to EN 55103-2channel. The all‑call microphone input and emergency Emission acc. to EN 55103-1activation override the call station selection on the callchannel. Each zone has separate priority overrides withpreset volume levels. This assures an appropriate Installation/Configuration Notesmessage volume, independent of any local volumesettings, such as for BGM. Both three‑wire and four‑wireoverride schemes are supported. An override alsoactivates a voltage-free contact (call-active) available forexternal control and monitoring. The master outputchannel, or one of the input channels, can be monitoredthrough the headphone connector and/or theLED VU‑meter.Controls and indicatorsFront LBB 1925/10 rear view• LED power meter• Power on LED• Call active LED Parts Included• Three knobs for mic/line volume, treble, and bass levels Quantity Component• Three knobs for BGM volume, treble, and bass levels• BGM source selection knob 1 LBB 1925/10 PLENA System Pre-amplifier• Six zone-selections keys 1 Power cord• Six zone status LEDs 1 Set of 19”mounting brackets• On/off switchBack 1 Plena CD• EMG input volume control 1 Installation and User Instructions• Mains voltage switchInterconnectionsFront Technical Specifications• Headphone jack ElectricalBack• One (DIN or XLR) Mic/line input Mains power supply• Two (DIN/DIN) call station inputs Voltage 230/115VAC, ±15%, 50/60 Hz• PC audio (cinch) input Current inrush 230/115 VAC, 1.5/3 A• Priority input• Master (XLR) output Max power consumption 25 VA• BGM (XLR) output Battery power supply• Emergency signal input Voltage 24 VDC, +10% / -15%• Two trigger inputs• RS-232 (DE-9) Current max 1A• Three (cinch) CD, tape, aux inputs Performance• Six 100 V speaker outputs Frequency response 50 Hz to 20 kHz (+1 / -3 dB)• 24 VDC output• 24 VDC input Distortion <0.5%• Three control inputs Bass control ±10 dB @ 100 Hz• Ground screw• IEC mains socket Treble control ±10 dB @ 10 kHz Channel separation >70 dB @ 1 kHz Priority mute >40 dBCertifications and Approvals Dynamic range 100 dB Mic/line input 1xRegion Certification Connectors 5‑pin DIN, 3‑pin XLR, balanced, withEurope CE Declaration of Conformity phantom power Sensitivity 1 mV (mic), 200 mV (line)
  • 3. LBB 1925/10 Plena System Pre-Amplifier | 3Mains power supply MechanicalImpedance >1 kohm (mic); >5 kohm (line) Dimensions (H x W x D) 100 x 430 x 270 mmS/N (flat at max volume) >63 dB (mic); >70 dB (line) (19" wide, 2U high)S/N (flat at min volme/muted) >75 dB Weight Approx. 5 kgCMRR >40 dB (50 Hz – 20 kHz) Mounting Standalone, 19" rackHeadroom >25 dB Color CharcoalSpeech filter -3 dB @ 315 Hz, high-pass, Environmental 6 dB/oct Operating temperature -10 ºC to +55 ºC (14 ºF to +131 ºF)Phantom power supply 16 V via 1.2 kohm, (mic mode only) Storage temperature -40 ºC to +70 ºC (-40 ºF to +158 ºF)Line input 3x Relative humidity <95%Connector Cinch, stereo converted to mono, unbal- ancedSensitivity 200 mV Ordering InformationImpedance 22 kohmS/N (flat at max volume) >70 dB LBB 1925/10 Plena System Pre-Amplifier LBB1925/10 6-zone, 2-channel distribution system unitS/N (flat at min volume/muted) >75 dB with call and BGM (background music)Headroom >25 dBMaster output 1xConnector 3-pin XLR, balancedNominal level 1VImpedance <100 ohmTape output 1xConnector Cinch, 2 x monoNominal level 350 mVImpedance <1 kohmHeadphone output 1xConnector 6.3 mm jack stereo, signal monoNominal level 3VImpedance <100 ohmZone relays 5AContacts voltage 250 VContacts current 8AInterconnection input / emer- 1 xgencyConnector 3-pin XLR, balancedSensitivity 200 mV (interconnection), 100 mV to 1 V adjustable (emergency)Impedance >10 kohmVOX threshold 45 mV (emergency)Interconnection output 1xConnector 3-pin XLR, balancedNominal level 200 mVImpedance <100 ohmRelay contacts 30 V, 1 ADC supply output voltage 24 V, 250 mA max www.boschsecurity.com
  • 4. 4 | LBB 1925/10 Plena System Pre-AmplifierAmericas: Europe, Middle East, Africa: Asia-Pacific: Represented byBosch Communications Systems Bosch Security Systems B.V. Robert Bosch (SEA) Pte Ltd12000 Portland Avenue South P.O. Box 80002 11 Bishan Street 21Burnsville, Minnesota 55337, USA 5600 JB Eindhoven, The Netherlands Singapore 573943Phone: +1-800-392-3497 Phone: + 31 40 2577 284 Phone: +65 6571 2600Fax: +1-800-955-6831 Fax: +31 40 2577 330 Fax: +65 6571 2698audiosupport@us.bosch.com emea.securitysystems@bosch.com apr.securitysystems@bosch.comwww.boschsecurity.com www.boschsecurity.com www.boschsecurity.com© Bosch Security Systems Inc. 011 | Data subject to change without noticeT866314379 | Cur: en-US, V24, 27 Jan 2011

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