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Communications Systems | LBC 3251/00 Intellivox 1b Active Line Array Loudspeaker




LBC 3251/00 Intellivox 1b Active Line
Array Loudspeaker
                                                              ▶ Active Loudspeakers
                                                              ▶ Variable Elevation Angle
                                                              ▶ Variable Vertical Opening Angle
                                                              ▶ Focus Distance
                                                              ▶ Even Sound Pressure and Constant Directivity
                                                              ▶ Suppressed Acoustic Side Lobes
                                                              ▶ WinControl
                                                              ▶ Integrated Remote Monitoring
                                                              ▶ AVC (Automatic Volume Control)
                                                              ▶ Wall Mounting




The Intellivox DDC (Digital Directivity Control) from Bosch   direction, opening angle and focus distance. As an added
Security Systems form a range of five active line array       benefit, the presence of a DSP means there is no need for
loudspeakers with unrivalled acoustical properties. Each      extra equalizers.
loudspeaker produces clear, natural sound for excellent       Variable Elevation Angle
intelligibility of both speech and music. In addition, the    Intellivox loudspeakers incorporate a feature known as
audio characteristics of each line array can be adjusted by   Digital Directivity Control, which enables the direction of
means of software to meet the acoustical requirements of      the main lobe to be tilted while the loudspeaker remains
the venue. This, along with the long acoustical reach         vertical. This is achieved by programming a different delay
('throw'), means only a few loudspeakers are required for     time for each individual driver in the array. As an example,
complete coverage. One loudspeaker can cover a distance       by specifying a longer delay for the drivers at the bottom
of up to 70 meters. The extensive integrated remote           of the array, the lobe is effectively tilted downwards.
monitoring possibilities of Intellivox loudspeakers also      These delay times, and therefore the elevation angle, are
make them extremely reliable and a key element in voice       programmed into the on-board DSP using a PC. This
evacuation systems.                                           feature gives much more mounting flexibility than
                                                              conventional mechanical aiming. It also makes better use
                                                              of the backward main lobe, because having the
Functions                                                     loudspeaker flat against a wall helps direct the sound
Active Loudspeakers                                           from this lobe towards the listening area.
All Intellivox loudspeakers have state-of-the-art class-D     Variable Vertical Opening Angle
amplifiers as standard. This guarantees efficient and         Being able to adjust the delay times and equalization
reliable operation without the need for external              settings for each driver in the array also makes it possible
amplification. They also have an on-board DSP (Digital        to specify the opening angle for all relevant frequencies.
Signal Processor), which controls the frequency and delay     When the specified angle is narrow, sound can be
time of each individual driver in the array, thus allowing    pinpointed very accurately to a distant listening area.
software adjustment of loudspeaker characteristics like       When the angle is wide, one loudspeaker can cover a very
                                                              broad area.




                                                                                               www.boschsecurity.com
2 | LBC 3251/00 Intellivox 1b Active Line Array Loudspeaker



Focus Distance                                                 10 different system parameters are checked - including
Intellivox loudspeakers are unique in allowing the             temperature, pilot tone and amplifier condition - to
loudspeaker focus distance to be set. The focus distance       guarantee system integrity.
is the point at which the output of each driver in the array   AVC (Automatic Volume Control)
converges. Specifying the focus distance sets how far the      In certain environments, such as sport stadiums and
main lobe reaches before the drivers’ contributions are        passenger terminals, the background noise level
out of phase and their sound energy becomes part of the        fluctuates constantly. Intellivox loudspeakers are
diffuse sound field.                                           equipped with an external terminal for connecting a
Even Sound Pressure and Constant Directivity                   sensor (LBC 3262/00) for measuring the ambient SPL.
By accurately adjusting the direction of the sound and         This information is used by the auto gain of the
vertical opening angle, a main lobe can be created that        loudspeaker amplifiers to constantly adjust the
has all relevant frequencies present at nearly the same        loudspeaker output so it is always the same level above
sound pressure level. With Intellivox loudspeakers, the        the ambient noise.
variation throughout the entire listening area is no more      Wall Mounting
than 3 dB. This means that the sound for listeners is not      There are several options for mounting the Intellivox
too loud at the front and not too quiet at the back. The       against a wall. It can be supported by means of the wall
constant directivity of Intellivox loudspeakers also helps     brackets supplied as standard, or by the LBC 3270/00
ensure the presence of all relevant frequencies for more       swivel bracket (adjustable through 90 degrees) or the
clear and natural sound.                                       LBC 3271/00 swivel bracket (adjustable through
Suppressed Acoustic Side Lobes                                 45 degrees). Both swivel brackets have to be ordered
Intellivox loudspeakers produce extremely small side           separately.
lobes, which gives a much clearer, less 'colored' sound,       Safety and Evacuation Compliant
even when close to the loudspeakers.                           The unrivalled speech intelligibility, reliability and
WinControl                                                     extensive monitoring features of Intellivox loudspeakers
WinControl is a 32-bit Windows®-compatible program that        makes them a key element in voice evacuation systems.
enables programming, testing and configuring of Intellivox     With Intellivox, systems can be built that comply with
units through the serial port of the PC. The software          both the technical requirements and acoustical demands
allows:                                                        of IEC 60849 and BS 5839.
•   Adaptation of signal processing-related parameters
    such as beam settings, gain, EQ, pre-delay and auto
    gain.
                                                               Certifications and Approvals
•   Updating or restoring of the DSP software.
•   Adaptation of surveillance-related parameters such as
    amplifier/DSP status, temperature overload and pilot       Region        Certification
    tone detection settings.
                                                               Europe        CE              Declaration of Conformity
•   Requesting of the loudspeaker status for error
    checking purposes.
•   Factory unit initialization.
Integrated Remote Monitoring
An Intellivox loudspeaker can be configured to notify a
building management, control or evacuation system
through in- and output relays if an error occurs. The
loudspeaker cabling can be automatically checked using a
20 kHz pilot tone. The status of each loudspeaker can also
be continuously monitored via an RS-485 network. Over
LBC 3251/00 Intellivox 1b Active Line Array Loudspeaker | 3



Installation/Configuration Notes




                                                                                                  L


                                K

LBC 3251/00

1     Offset for acoustical mounting height on axis lowest speaker              2k         13.5       105        132        22
2     Cable entry                                                               4k         13.3       102        108        17
Acoustical Data                                                                 8k         14.3       98         67         15

Frequency1 DI2(dB)            Pac3(dBPWL) Horizontal        Vertical
(Hz)                                      coverage          coverage
                                          -6 dB (deg)2      -6 dB (deg)2
125           1.6             110            360            360
250           3.0             109            360            164
500           5.7             107            256            76
1k            9.4             105            218            39




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4 | LBC 3251/00 Intellivox 1b Active Line Array Loudspeaker




        25                                                                120



        20
                                                                          110


        15

   dB                                                                   dB 100

        10


                                                                           90
         5



         0                                                                 80
          100                  1000                             10000        100                      1000                               10000
                                Hz                                                                    Hz




        300                                                                120

        270                                                                110
                                                                           100
        240
                                                                            90
        210
                                                                            80
        180                                                                 70
   deg 150                                                              deg 60

        120                                                                 50
                                                                            40
         90
                                                                            30
         60
                                                                            20
         30                                                                 10
             0                                                               0
              100               1000                            10000         100                     1000                               10000
                                 Hz                                                                    Hz


1 Directivity index      3   Horizontal opening angle (-6 dB)           from simulations, refer to general notes [2]. Acoustical
                                                                        power (Pac) expressed in dB          relative to 10   -12   W,
2 Acoustical power       4   Vertical opening angle (-6 dB)                                           PWL
                                                                        simulated with 100 dB,
Notes:
                                                                        SPL source level @ 1m ‘on axis’ for each octave band, see
Settings: Elevation angle = 0 deg, Opening angle = 25 deg,
Focus distance = 10 m. All values from octave band averaged             general notes [2].
data. Only valid in the far-field (d > approx. 5 m), results
LBC 3251/00 Intellivox 1b Active Line Array Loudspeaker | 5




                                  125 Hz                                                        250 Hz

          120                                                              120

          115                                                              115

          110                                                              110

          105                                                              105

          100                                                              100

      dBspl 95                                                         dBspl 95

           90                                                               90

           85                                                               85

           80                                                               80

           75                                                               75

           70                                                               70
                 1                  10                     100                    1              10                       100
                                   d (m)                                                        d (m)




                                  500 Hz                                                        1 kHz

          120                                                              120

          115                                                              115

          110                                                              110

          105                                                              105

          100                                                              100

      dBspl 95                                                         dBspl 95

           90                                                               90

           85                                                               85

           80                                                               80

           75                                                               75

           70                                                               70
                 1                  10                     100                    1              10                       100
                                   d (m)                                                        d (m)




                                   2 kHz                                                        4 kHz
          120                                                              120

          115                                                              115

          110                                                              110

          105                                                              105

          100                                                              100

      dBspl 95                                                         dBspl 95

           90                                                               90

           85                                                               85

           80                                                               80

           75                                                               75

           70                                                               70
                 1                  10                     100                    1              10                       100
                                   d (m)                                                        d (m)


                                                                                                                     Simulated



SPL versus Distance (on axis)
Notes:
Settings: Elevation angle = 0 deg, Opening angle = 25 deg, Focus distance = 10 m. Simulations 100 dB SPL source level @ 1m
‘on axis’ for each octave band. Measurements scaled to simulation results at d = 10 m, zc = zli = 1.7 m, see general notes [1] for
measurement details.




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6 | LBC 3251/00 Intellivox 1b Active Line Array Loudspeaker




                                 125 Hz                                                         250 Hz

         120                                                             120

         115                                                             115

         110                                                             110

         105                                                             105

         100                                                             100

     dBspl 95                                                       dBspl 95

          90                                                              90

          85                                                              85

          80                                                              80

          75                                                              75

          70                                                              70
                1                  10                     100                  1                  10                      100
                                  d (m)                                                          d (m)




                                 500 Hz                                                         1 kHz

         120                                                            120

         115                                                            115

         110                                                            110

         105                                                            105

         100                                                            100

     dBspl 95                                                       dBspl 95

          90                                                             90

          85                                                             85

          80                                                             80

          75                                                             75

          70                                                             70
                1                  10                     100                  1                 10                      100
                                  d (m)                                                         d (m)




                                  2 kHz                                                         4 kHz
         120                                                            120

         115                                                            115

         110                                                            110

         105                                                            105

         100                                                            100

     dBspl 95                                                       dBspl 95

          90                                                             90

          85                                                             85

          80                                                             80

          75                                                             75

          70                                                             70
                1                  10                     100                  1                 10                       100
                                  d (m)                                                         d (m)


                                                                                                                     Simulated




SPL versus Distance (Deta-z = 0,5 m))
Notes:
Settings: Elevation angle = -3 deg, Opening angle = 25 deg, Focus distance = 10 m. Simulations 100 dB SPL source level @ 1m
‘on axis’ for each octave band, see general notes [2]. Measurements scaled to simulation results at d = 10 m, zc = 2.2 m, zli =
1.7 m see general notes [1] for measurement details
LBC 3251/00 Intellivox 1b Active Line Array Loudspeaker | 7




                                                          125 Hz                                                                                                   250 Hz

                                                                0                                                                                                        0
                                                         10           -10                                                                                        10            -10
                                                  20                         -20                                                                            20                        -20
                                            30                                      -30                                                               30                                     -30
                                       40                                                  -40                                                 40                                                   -40
                                 50                                                               -50                                     50                                                               -50

                            60                                                                          -60                          60                                                                          -60

                       70                                                                                 -70                   70                                                                                 -70

                      80                                                                                      -80             80                                                                                       -80

                     90                                                                                        -90            90                                                                                        -90

                     100                                                                                      -100            100                                                                                      -100

                      110                                                                                 -110                 110                                                                                 -110

                           120                                                                          -120                        120                                                                          -120

                             130                                                                  -130                                130                                                                  -130
                                      140                                                  -140                                                140                                                  -140
                                            150                                     -150                                                             150                                     -150
                                                  160                        -160                                                                          160                        -160
                                                        170           -170                                                                                       170           -170
                                                               180                                                                                                      180



                                                          500 Hz                                                                                                       1 kHz

                                                                0                                                                                                        0
                                                         10           -10                                                                                        10            -10
                                                  20                         -20                                                                            20                        -20
                                            30                                      -30                                                               30                                     -30
                                       40                                                  -40                                                 40                                                   -40
                                 50                                                               -50                                     50                                                               -50

                            60                                                                          -60                          60                                                                          -60

                       70                                                                                 -70                   70                                                                                 -70

                      80                                                                                      -80             80                                                                                       -80

                     90                                                                                        -90            90                                                                                        -90

                     100                                                                                      -100            100                                                                                      -100

                      110                                                                                 -110                 110                                                                                 -110

                           120                                                                          -120                        120                                                                          -120

                             130                                                                  -130                                130                                                                  -130
                                      140                                                  -140                                                140                                                  -140
                                            150                                     -150                                                             150                                     -150
                                                  160                        -160                                                                          160                        -160
                                                        170           -170                                                                                       170           -170
                                                               180                                                                                                      180



                                                              2 kHz                                                                                                    4 kHz

                                                                0                                                                                                        0
                                                         10           -10                                                                                        10            -10
                                                  20                         -20                                                                            20                        -20
                                            30                                      -30                                                               30                                     -30
                                       40                                                  -40                                                 40                                                   -40
                                 50                                                               -50                                     50                                                               -50

                            60                                                                          -60                          60                                                                          -60

                       70                                                                                 -70                   70                                                                                 -70

                      80                                                                                      -80             80                                                                                       -80

                     90                                                                                        -90            90                                                                                        -90

                     100                                                                                      -100            100                                                                                      -100

                      110                                                                                 -110                 110                                                                                 -110

                           120                                                                          -120                        120                                                                          -120

                             130                                                                  -130                                130                                                                  -130
                                      140                                                  -140                                                140                                                  -140
                                            150                                     -150                                                             150                                     -150
                                                  160                        -160                                                                          160                        -160
                                                        170           -170                                                                                       170           -170
                                                               180                                                                                                      180



                                                              8 kHz

                                                                0
                                                         10           -10
                                                  20                         -20
                                            30                                      -30
                                       40                                                  -40
                                 50                                                               -50

                            60                                                                          -60

                       70                                                                                 -70

                      80                                                                                      -80

                     90                                                                                        -90

                     100                                                                                      -100

                      110                                                                                 -110

                           120                                                                          -120

                             130                                                                  -130
                                      140                                                  -140
                                            150                                     -150
                                                  160                        -160
                                                        170           -170
                                                               180




Horizontal Polar Data
Notes:
1/1 octave averaged far-field data (r = 1000 m), Angular resolution 10 deg, Scale 6 dB/div, Positive angles = left side (unit top
view), Settings: Elevation angle = 0 deg, Opening angle = 25 deg, Focus distance = 10 m, Simulations only




                                                                                                                                                                                                                              www.boschsecurity.com
8 | LBC 3251/00 Intellivox 1b Active Line Array Loudspeaker



                                                             125 Hz                                                                                               250 Hz

                                                                   0                                                                                                    0
                                                           10            -10                                                                                     10           -10
                                                     20                         -20                                                                        20                        -20
                                                30                                     -30                                                           30                                     -30
                                         40                                                   -40                                              40                                                  -40
                                   50                                                                -50                                 50                                                               -50

                              60                                                                           -60                      60                                                                          -60

                         70                                                                                  -70               70                                                                                 -70

                       80                                                                                         -80     80                                                                                           -80

                       90                                                                                         -90     90                                                                                           -90

                       100                                                                                        -100   100                                                                                           -100

                        110                                                                                  -110          110                                                                                    -110

                             120                                                                           -120                 120                                                                             -120

                               130                                                                   -130                            130                                                                  -130

                                         140                                                  -140                                            140                                                  -140
                                               150                                     -150                                                         150                                     -150
                                                     160                        -160                                                                      160                        -160
                                                           170           -170                                                                                   170           -170
                                                                  180                                                                                                  180



                                                             500 Hz                                                                                                   1 kHz

                                                                   0                                                                                                    0
                                                            10           -10                                                                                     10           -10
                                                     20                         -20                                                                        20                        -20
                                                30                                     -30                                                           30                                     -30
                                          40                                                  -40                                              40                                                  -40

                                    50                                                               -50                                 50                                                               -50

                              60                                                                           -60                  60                                                                              -60

                         70                                                                                  -70           70                                                                                     -70

                       80                                                                                         -80     80                                                                                           -80

                       90                                                                                         -90    90                                                                                            -90

                       100                                                                                        -100   100                                                                                           -100

                        110                                                                                  -110         110                                                                                     -110

                             120                                                                           -120                120                                                                              -120

                                   130                                                               -130                            130                                                                  -130

                                         140                                                  -140                                            140                                                  -140
                                               150                                     -150                                                         150                                     -150
                                                     160                        -160                                                                      160                        -160
                                                           170           -170                                                                                   170           -170
                                                                  180                                                                                                  180



                                                                 2 kHz                                                                                                4 kHz

                                                                   0                                                                                                    0
                                                            10           -10                                                                                    10            -10
                                                      20                        -20                                                                       20                         -20
                                                30                                     -30                                                           30                                     -30
                                          40                                                  -40                                             40                                                   -40

                                   50                                                                -50                                 50                                                               -50

                              60                                                                           -60                  60                                                                              -60

                         70                                                                                  -70           70                                                                                     -70

                        80                                                                                        -80    80                                                                                            -80

                       90                                                                                         -90    90                                                                                            -90

                       100                                                                                        -100   100                                                                                           -100

                        110                                                                                  -110         110                                                                                     -110

                             120                                                                           -120                120                                                                              -120

                                   130                                                               -130                            130                                                                  -130

                                         140                                                  -140                                            140                                                  -140
                                               150                                     -150                                                         150                                     -150
                                                     160                        -160                                                                      160                        -160
                                                           170           -170                                                                                   170           -170
                                                                  180                                                                                                  180



                                                                 8 kHz

                                                                   0
                                                           10            -10
                                                     20                         -20
                                                30                                     -30
                                         40                                                   -40

                                   50                                                                -50

                              60                                                                           -60

                         70                                                                                  -70

                       80                                                                                         -80

                       90                                                                                         -90

                       100                                                                                        -100

                        110                                                                                  -110

                             120                                                                           -120

                               130                                                                   -130

                                         140                                                  -140
                                               150                                     -150
                                                     160                        -160
                                                           170           -170
                                                                  180




Vertical Polar Data
Notes:
1/1 octave averaged far-field data (r = 10 m), Angular resolution 2.5 deg, Scale 6 dB/div, Positive angles = top side, Settings:
Elevation angle = 0 deg, Opening angle = 25 deg, Focus distance = 10 m, Simulations only
LBC 3251/00 Intellivox 1b Active Line Array Loudspeaker | 9




Vertical and Horizontal Beam Cross-Sections
Notes:
Settings: Elevation angle = -3 deg, Opening angle = 25 deg, Focus distance = 10 m, Reference mounting height zc = 2.2 m.
Simulations 100 dB SPL source level @ 1m ‘on axis’ for each octave band. Dimensions of all vertical cross sections (top) 100 m x
10 m. Dimensions of all horizontal cross sections (bottom) 100 m x 20 m.




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10 | LBC 3251/00 Intellivox 1b Active Line Array Loudspeaker



Technical Specifications                                                 Input7

Acoustical (1)                                                           Remote surveillance             •      general status (DSP running, signal
                                                                                                                present etc.)
Frequency range2                                                                                         •      amplifier monitoring and load moni-
                                                                                                                toring schemes
4” loudspeaker           230 to 10 kHz (±3 dB)                                                           •      external pilot tone detection
10 mm tweeter            6k to 20 kHz (±3 dB)                                                                   (20..30 kHz, level > -22 dBV)
LF complete array        130 Hz (-3 dB)
                                                                                                         •      ambient noise microphone monitor-
                                                                                                                ing
Max SPL3                                                                                                 •      frost protection
Continuous               92 dB SPL A-weighed with pink noise at                                          •      fan control for optional external fan
                         10 m                                                                            •      thermal overload protection
                                                                         Failure                       - internal hardware bypass circuit
Peak                     96 dB SPL at 10 m
                                                                                                       - failure relay (external connector, maskable
Coverage                                                                                               conditions)
Horizontal (fixed)4      150 deg                                         Power amplifiers
Vertical (adjustable)5   Opening angle: 15° to 40°                       Type                          PWM (class D)
                         elevation (aiming) angle: -16° to 16°           Power                         8 x 40 Wrms (4 ohm)
                         focus distance: 2 to 40 m
                                                                         Protection                    Thermal shutdown if T junction > 150 °C
Dynamic range6           88 dB
                                                                                                       Current limiting output stage
Electrical                                                               Connectors

Input7                                                                   General type                  5 mm pitch cage clamp (as WAGO series
                                                                                                       231)
Nominal level            0 dBu (line input) and +50 dBu
                         (100 V input)                                   Audio inputs                  6-pin male
                                                                                                       p1 = Line +, p2 = Line -, p3 = GND
DLC threshold (1 kHz)    +3 dBu, 6 dB headroom before clip (gain /                                     p4 = 100V +, p5 = 100V -, p6 = GND
                         volume 0 dB)
                                                                         RS-485 Interface              5-pin male
Type                     Transformer balanced                                                          p1 = A, p2 = B, p3 = Z, p4 = Y,
Impedance (balanced)     6.8 kohm (line input) and                                                     p5 = DGND
                         2 Mohm (100 V input)                            Ambient noise and             5-pin female
DSP module8                                                              temperature sensor            p1 = MIC, p2 = AGND, p3 = NTC,
                                                                                                       p4 = AGND, p5 = GND
Type                     32-bit floating point
                                                                         Failure detect and fan con-   5-pin female
Memory                   32 k words SRAM, 2 x 8 kB EEPROM                trol                          failure relay: p1 = COM, p2 = NO,
ADCs                     Two channel, 18 bit sigma-delta converters                                    p3 = NC
                                                                                                       optional fan: p4 = -, p5 = +24 V
DACs                     Eight channel, 18 bit sigma-delta converters
                                                                         Mains                         3-pin IEC
Sample frequency         48.8 kHz
                                                                         PSU
Signal processing9        •      pre-delay (< 335 ms @ 32 bit float)
                          •      equalizer and compensation filtering    Mains voltage (+5/-10%)11 230 or 115 V
                          •      compressor and noise gate               Mains fuse(s)                 2 x 1.6 A (slow type)
                          •      volume and analog pre-gain
                          •      ambient noise level dependent gain      Power consumption12           28 VA (idle) / 150 VA (full load)
                                 adaptation (‘fail-safe’)                Power Factor                  0.70
                          •      eight output filters
                          •      high resolution output channel delays   Max mains                     12 A short-time peak (@ 230 V)
                                 (ΔT = 10.2 µs)                          inrush current
Control unit                                                             Mechanical
Network interface type   Serial full-duplex RS-485, 19.2 kbaud, opti-
                                                                         Dimensions (H x W x D)14      670 x 134 x 186 mm
                         cally isolated
                                                                         Weight                        16 kg
Maximum number of units10 126
                                                                         Default color                 Silver
                                                                         Transducers                   6 x 4” loudspeaker
                                                                                                       2 x 10 mm ferrofluid cooled tweeter, co-
                                                                                                       axially mounted
LBC 3251/00 Intellivox 1b Active Line Array Loudspeaker | 11



Environmental                                                           Ordering Information
Operating temperature13   -15 ºC to +40 ºC (5 ºF to +104 ºF)             LBC 3251/00 Intellivox 1b Active Line             LBC3251/00
                                                                         Array Loudspeaker
Storage temperature       -40 ºC to +70 ºC (-40 ºF to +158 ºF)
                                                                         active line array loudspeaker with unrivalled
Relative humidity         <95%                                           acoustical properties
Notes:                                                                  Accessories
1. Measured outside under semi-anechoic ‘full-space’                     LBC 3260/00 WinControl Software                   LBC3260/00
    conditions with typical filter and delay settings unless             A 32 bit Windows-compatible program for
    stated otherwise.                                                    configuring, testing and monitoring Intellivox.
2. Single transducer only, from 1/3 octave averaged data
    at 1 m. Actual measured frequency response of                        LBC 3261/00 Intellivox Dual Lobe                  LBC3261/00
    complete array is depending on the actual signal                     Software
    processing parameters and air absorption (at larger                  Dual Lobe Software
    distances). Only low frequency –3 dB point is                        LBC 3262/00 Ambient Microphone and                LBC3262/00
    specified for complete array (‘full-space’).                         Temperature Sensor
3. Continuous level: rms level measured with SLM (slow,                  Ambient Microphone and Temperature Sen-
    A-weighed) with pink noise source level just below                   sor
    DLC input limiter threshold. Peak level: the maximum
    short-term A-weighed rms sound pressure level                        LBC 3270/00 Wall Mounting Bracket 90°             LBC3270/00
    measured with a SLM and a pulsating pink noise                       Bracket 90°
    source.                                                              LBC 3271/00 Wall Mounting Bracket 45°             LBC3271/00
4. Settings: Elevation angle = 0 deg, Opening angle = 15                 Bracket 45°
    deg, Focus distance = 10 m.
5. Opening angle -6 dB, average value 1k - 4kHz octave
    band.
6. Opening angle -6 dB, typical values, only valid in the
    far-field
    (d > approx. 5 m).
7. For this measurement the signals at all power
    amplifier outputs are summed together. Measured as
    the A-weighed difference (in dB) between the
    maximum rms level (with pink noise input signal) and
    the noise output (with no input signal present).
8. Specs valid for default type 3 input board, 0 dBu =
    0.775 V rms . Dual-line input available as an option.
9. “Dual lobe’ and ‘Extended pre-delay’ (up to 2684 ms)
    available as a DSP software / hardware option.
10. Maximum number that can be connected to one
    RS-485 subnet, multiple subnets can be controlled by
    one host PC.
11. Mains voltage can be selected on the IEC inlet,
    accessible from the outside of the unit.
12. Defined as the rms mains current multiplied by the
    rms mains voltage under normal operating
    conditions. ’Full load’ figures are maximum values
    measured with a pulsating pink noise input signal.
13. With frost protection and installed ambient
    temperature sensor. Outdoor versions available upon
    request. Without frost protection, lower limit: 0 °C.
14. Depth of enclosure only (including heatsink), without
    mounting brackets.




                                                                                                                 www.boschsecurity.com
12 | LBC 3251/00 Intellivox 1b Active Line Array Loudspeaker




Americas:                                Europe, Middle East, Africa:         Asia-Pacific:                   Represented by
Bosch Communications Systems             Bosch Security Systems B.V.          Robert Bosch (SEA) Pte Ltd
12000 Portland Avenue South              P.O. Box 80002                       11 Bishan Street 21
Burnsville, Minnesota 55337, USA         5600 JB Eindhoven, The Netherlands   Singapore 573943
Phone: +1-800-392-3497                   Phone: + 31 40 2577 284              Phone: +65 6571 2600
Fax: +1-800-955-6831                     Fax: +31 40 2577 330                 Fax: +65 6571 2698
audiosupport@us.bosch.com                emea.securitysystems@bosch.com       apr.securitysystems@bosch.com
www.boschsecurity.com                    www.boschsecurity.com                www.boschsecurity.com



© Bosch Security Systems Inc. 011 | Data subject to change without notice
T2345690379 | Cur: en-US, V19, 27 Jan 2011

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  • 1. Communications Systems | LBC 3251/00 Intellivox 1b Active Line Array Loudspeaker LBC 3251/00 Intellivox 1b Active Line Array Loudspeaker ▶ Active Loudspeakers ▶ Variable Elevation Angle ▶ Variable Vertical Opening Angle ▶ Focus Distance ▶ Even Sound Pressure and Constant Directivity ▶ Suppressed Acoustic Side Lobes ▶ WinControl ▶ Integrated Remote Monitoring ▶ AVC (Automatic Volume Control) ▶ Wall Mounting The Intellivox DDC (Digital Directivity Control) from Bosch direction, opening angle and focus distance. As an added Security Systems form a range of five active line array benefit, the presence of a DSP means there is no need for loudspeakers with unrivalled acoustical properties. Each extra equalizers. loudspeaker produces clear, natural sound for excellent Variable Elevation Angle intelligibility of both speech and music. In addition, the Intellivox loudspeakers incorporate a feature known as audio characteristics of each line array can be adjusted by Digital Directivity Control, which enables the direction of means of software to meet the acoustical requirements of the main lobe to be tilted while the loudspeaker remains the venue. This, along with the long acoustical reach vertical. This is achieved by programming a different delay ('throw'), means only a few loudspeakers are required for time for each individual driver in the array. As an example, complete coverage. One loudspeaker can cover a distance by specifying a longer delay for the drivers at the bottom of up to 70 meters. The extensive integrated remote of the array, the lobe is effectively tilted downwards. monitoring possibilities of Intellivox loudspeakers also These delay times, and therefore the elevation angle, are make them extremely reliable and a key element in voice programmed into the on-board DSP using a PC. This evacuation systems. feature gives much more mounting flexibility than conventional mechanical aiming. It also makes better use of the backward main lobe, because having the Functions loudspeaker flat against a wall helps direct the sound Active Loudspeakers from this lobe towards the listening area. All Intellivox loudspeakers have state-of-the-art class-D Variable Vertical Opening Angle amplifiers as standard. This guarantees efficient and Being able to adjust the delay times and equalization reliable operation without the need for external settings for each driver in the array also makes it possible amplification. They also have an on-board DSP (Digital to specify the opening angle for all relevant frequencies. Signal Processor), which controls the frequency and delay When the specified angle is narrow, sound can be time of each individual driver in the array, thus allowing pinpointed very accurately to a distant listening area. software adjustment of loudspeaker characteristics like When the angle is wide, one loudspeaker can cover a very broad area. www.boschsecurity.com
  • 2. 2 | LBC 3251/00 Intellivox 1b Active Line Array Loudspeaker Focus Distance 10 different system parameters are checked - including Intellivox loudspeakers are unique in allowing the temperature, pilot tone and amplifier condition - to loudspeaker focus distance to be set. The focus distance guarantee system integrity. is the point at which the output of each driver in the array AVC (Automatic Volume Control) converges. Specifying the focus distance sets how far the In certain environments, such as sport stadiums and main lobe reaches before the drivers’ contributions are passenger terminals, the background noise level out of phase and their sound energy becomes part of the fluctuates constantly. Intellivox loudspeakers are diffuse sound field. equipped with an external terminal for connecting a Even Sound Pressure and Constant Directivity sensor (LBC 3262/00) for measuring the ambient SPL. By accurately adjusting the direction of the sound and This information is used by the auto gain of the vertical opening angle, a main lobe can be created that loudspeaker amplifiers to constantly adjust the has all relevant frequencies present at nearly the same loudspeaker output so it is always the same level above sound pressure level. With Intellivox loudspeakers, the the ambient noise. variation throughout the entire listening area is no more Wall Mounting than 3 dB. This means that the sound for listeners is not There are several options for mounting the Intellivox too loud at the front and not too quiet at the back. The against a wall. It can be supported by means of the wall constant directivity of Intellivox loudspeakers also helps brackets supplied as standard, or by the LBC 3270/00 ensure the presence of all relevant frequencies for more swivel bracket (adjustable through 90 degrees) or the clear and natural sound. LBC 3271/00 swivel bracket (adjustable through Suppressed Acoustic Side Lobes 45 degrees). Both swivel brackets have to be ordered Intellivox loudspeakers produce extremely small side separately. lobes, which gives a much clearer, less 'colored' sound, Safety and Evacuation Compliant even when close to the loudspeakers. The unrivalled speech intelligibility, reliability and WinControl extensive monitoring features of Intellivox loudspeakers WinControl is a 32-bit Windows®-compatible program that makes them a key element in voice evacuation systems. enables programming, testing and configuring of Intellivox With Intellivox, systems can be built that comply with units through the serial port of the PC. The software both the technical requirements and acoustical demands allows: of IEC 60849 and BS 5839. • Adaptation of signal processing-related parameters such as beam settings, gain, EQ, pre-delay and auto gain. Certifications and Approvals • Updating or restoring of the DSP software. • Adaptation of surveillance-related parameters such as amplifier/DSP status, temperature overload and pilot Region Certification tone detection settings. Europe CE Declaration of Conformity • Requesting of the loudspeaker status for error checking purposes. • Factory unit initialization. Integrated Remote Monitoring An Intellivox loudspeaker can be configured to notify a building management, control or evacuation system through in- and output relays if an error occurs. The loudspeaker cabling can be automatically checked using a 20 kHz pilot tone. The status of each loudspeaker can also be continuously monitored via an RS-485 network. Over
  • 3. LBC 3251/00 Intellivox 1b Active Line Array Loudspeaker | 3 Installation/Configuration Notes L K LBC 3251/00 1 Offset for acoustical mounting height on axis lowest speaker 2k 13.5 105 132 22 2 Cable entry 4k 13.3 102 108 17 Acoustical Data 8k 14.3 98 67 15 Frequency1 DI2(dB) Pac3(dBPWL) Horizontal Vertical (Hz) coverage coverage -6 dB (deg)2 -6 dB (deg)2 125 1.6 110 360 360 250 3.0 109 360 164 500 5.7 107 256 76 1k 9.4 105 218 39 www.boschsecurity.com
  • 4. 4 | LBC 3251/00 Intellivox 1b Active Line Array Loudspeaker 25 120 20 110 15 dB dB 100 10 90 5 0 80 100 1000 10000 100 1000 10000 Hz Hz 300 120 270 110 100 240 90 210 80 180 70 deg 150 deg 60 120 50 40 90 30 60 20 30 10 0 0 100 1000 10000 100 1000 10000 Hz Hz 1 Directivity index 3 Horizontal opening angle (-6 dB) from simulations, refer to general notes [2]. Acoustical power (Pac) expressed in dB relative to 10 -12 W, 2 Acoustical power 4 Vertical opening angle (-6 dB) PWL simulated with 100 dB, Notes: SPL source level @ 1m ‘on axis’ for each octave band, see Settings: Elevation angle = 0 deg, Opening angle = 25 deg, Focus distance = 10 m. All values from octave band averaged general notes [2]. data. Only valid in the far-field (d > approx. 5 m), results
  • 5. LBC 3251/00 Intellivox 1b Active Line Array Loudspeaker | 5 125 Hz 250 Hz 120 120 115 115 110 110 105 105 100 100 dBspl 95 dBspl 95 90 90 85 85 80 80 75 75 70 70 1 10 100 1 10 100 d (m) d (m) 500 Hz 1 kHz 120 120 115 115 110 110 105 105 100 100 dBspl 95 dBspl 95 90 90 85 85 80 80 75 75 70 70 1 10 100 1 10 100 d (m) d (m) 2 kHz 4 kHz 120 120 115 115 110 110 105 105 100 100 dBspl 95 dBspl 95 90 90 85 85 80 80 75 75 70 70 1 10 100 1 10 100 d (m) d (m) Simulated SPL versus Distance (on axis) Notes: Settings: Elevation angle = 0 deg, Opening angle = 25 deg, Focus distance = 10 m. Simulations 100 dB SPL source level @ 1m ‘on axis’ for each octave band. Measurements scaled to simulation results at d = 10 m, zc = zli = 1.7 m, see general notes [1] for measurement details. www.boschsecurity.com
  • 6. 6 | LBC 3251/00 Intellivox 1b Active Line Array Loudspeaker 125 Hz 250 Hz 120 120 115 115 110 110 105 105 100 100 dBspl 95 dBspl 95 90 90 85 85 80 80 75 75 70 70 1 10 100 1 10 100 d (m) d (m) 500 Hz 1 kHz 120 120 115 115 110 110 105 105 100 100 dBspl 95 dBspl 95 90 90 85 85 80 80 75 75 70 70 1 10 100 1 10 100 d (m) d (m) 2 kHz 4 kHz 120 120 115 115 110 110 105 105 100 100 dBspl 95 dBspl 95 90 90 85 85 80 80 75 75 70 70 1 10 100 1 10 100 d (m) d (m) Simulated SPL versus Distance (Deta-z = 0,5 m)) Notes: Settings: Elevation angle = -3 deg, Opening angle = 25 deg, Focus distance = 10 m. Simulations 100 dB SPL source level @ 1m ‘on axis’ for each octave band, see general notes [2]. Measurements scaled to simulation results at d = 10 m, zc = 2.2 m, zli = 1.7 m see general notes [1] for measurement details
  • 7. LBC 3251/00 Intellivox 1b Active Line Array Loudspeaker | 7 125 Hz 250 Hz 0 0 10 -10 10 -10 20 -20 20 -20 30 -30 30 -30 40 -40 40 -40 50 -50 50 -50 60 -60 60 -60 70 -70 70 -70 80 -80 80 -80 90 -90 90 -90 100 -100 100 -100 110 -110 110 -110 120 -120 120 -120 130 -130 130 -130 140 -140 140 -140 150 -150 150 -150 160 -160 160 -160 170 -170 170 -170 180 180 500 Hz 1 kHz 0 0 10 -10 10 -10 20 -20 20 -20 30 -30 30 -30 40 -40 40 -40 50 -50 50 -50 60 -60 60 -60 70 -70 70 -70 80 -80 80 -80 90 -90 90 -90 100 -100 100 -100 110 -110 110 -110 120 -120 120 -120 130 -130 130 -130 140 -140 140 -140 150 -150 150 -150 160 -160 160 -160 170 -170 170 -170 180 180 2 kHz 4 kHz 0 0 10 -10 10 -10 20 -20 20 -20 30 -30 30 -30 40 -40 40 -40 50 -50 50 -50 60 -60 60 -60 70 -70 70 -70 80 -80 80 -80 90 -90 90 -90 100 -100 100 -100 110 -110 110 -110 120 -120 120 -120 130 -130 130 -130 140 -140 140 -140 150 -150 150 -150 160 -160 160 -160 170 -170 170 -170 180 180 8 kHz 0 10 -10 20 -20 30 -30 40 -40 50 -50 60 -60 70 -70 80 -80 90 -90 100 -100 110 -110 120 -120 130 -130 140 -140 150 -150 160 -160 170 -170 180 Horizontal Polar Data Notes: 1/1 octave averaged far-field data (r = 1000 m), Angular resolution 10 deg, Scale 6 dB/div, Positive angles = left side (unit top view), Settings: Elevation angle = 0 deg, Opening angle = 25 deg, Focus distance = 10 m, Simulations only www.boschsecurity.com
  • 8. 8 | LBC 3251/00 Intellivox 1b Active Line Array Loudspeaker 125 Hz 250 Hz 0 0 10 -10 10 -10 20 -20 20 -20 30 -30 30 -30 40 -40 40 -40 50 -50 50 -50 60 -60 60 -60 70 -70 70 -70 80 -80 80 -80 90 -90 90 -90 100 -100 100 -100 110 -110 110 -110 120 -120 120 -120 130 -130 130 -130 140 -140 140 -140 150 -150 150 -150 160 -160 160 -160 170 -170 170 -170 180 180 500 Hz 1 kHz 0 0 10 -10 10 -10 20 -20 20 -20 30 -30 30 -30 40 -40 40 -40 50 -50 50 -50 60 -60 60 -60 70 -70 70 -70 80 -80 80 -80 90 -90 90 -90 100 -100 100 -100 110 -110 110 -110 120 -120 120 -120 130 -130 130 -130 140 -140 140 -140 150 -150 150 -150 160 -160 160 -160 170 -170 170 -170 180 180 2 kHz 4 kHz 0 0 10 -10 10 -10 20 -20 20 -20 30 -30 30 -30 40 -40 40 -40 50 -50 50 -50 60 -60 60 -60 70 -70 70 -70 80 -80 80 -80 90 -90 90 -90 100 -100 100 -100 110 -110 110 -110 120 -120 120 -120 130 -130 130 -130 140 -140 140 -140 150 -150 150 -150 160 -160 160 -160 170 -170 170 -170 180 180 8 kHz 0 10 -10 20 -20 30 -30 40 -40 50 -50 60 -60 70 -70 80 -80 90 -90 100 -100 110 -110 120 -120 130 -130 140 -140 150 -150 160 -160 170 -170 180 Vertical Polar Data Notes: 1/1 octave averaged far-field data (r = 10 m), Angular resolution 2.5 deg, Scale 6 dB/div, Positive angles = top side, Settings: Elevation angle = 0 deg, Opening angle = 25 deg, Focus distance = 10 m, Simulations only
  • 9. LBC 3251/00 Intellivox 1b Active Line Array Loudspeaker | 9 Vertical and Horizontal Beam Cross-Sections Notes: Settings: Elevation angle = -3 deg, Opening angle = 25 deg, Focus distance = 10 m, Reference mounting height zc = 2.2 m. Simulations 100 dB SPL source level @ 1m ‘on axis’ for each octave band. Dimensions of all vertical cross sections (top) 100 m x 10 m. Dimensions of all horizontal cross sections (bottom) 100 m x 20 m. www.boschsecurity.com
  • 10. 10 | LBC 3251/00 Intellivox 1b Active Line Array Loudspeaker Technical Specifications Input7 Acoustical (1) Remote surveillance • general status (DSP running, signal present etc.) Frequency range2 • amplifier monitoring and load moni- toring schemes 4” loudspeaker 230 to 10 kHz (±3 dB) • external pilot tone detection 10 mm tweeter 6k to 20 kHz (±3 dB) (20..30 kHz, level > -22 dBV) LF complete array 130 Hz (-3 dB) • ambient noise microphone monitor- ing Max SPL3 • frost protection Continuous 92 dB SPL A-weighed with pink noise at • fan control for optional external fan 10 m • thermal overload protection Failure - internal hardware bypass circuit Peak 96 dB SPL at 10 m - failure relay (external connector, maskable Coverage conditions) Horizontal (fixed)4 150 deg Power amplifiers Vertical (adjustable)5 Opening angle: 15° to 40° Type PWM (class D) elevation (aiming) angle: -16° to 16° Power 8 x 40 Wrms (4 ohm) focus distance: 2 to 40 m Protection Thermal shutdown if T junction > 150 °C Dynamic range6 88 dB Current limiting output stage Electrical Connectors Input7 General type 5 mm pitch cage clamp (as WAGO series 231) Nominal level 0 dBu (line input) and +50 dBu (100 V input) Audio inputs 6-pin male p1 = Line +, p2 = Line -, p3 = GND DLC threshold (1 kHz) +3 dBu, 6 dB headroom before clip (gain / p4 = 100V +, p5 = 100V -, p6 = GND volume 0 dB) RS-485 Interface 5-pin male Type Transformer balanced p1 = A, p2 = B, p3 = Z, p4 = Y, Impedance (balanced) 6.8 kohm (line input) and p5 = DGND 2 Mohm (100 V input) Ambient noise and 5-pin female DSP module8 temperature sensor p1 = MIC, p2 = AGND, p3 = NTC, p4 = AGND, p5 = GND Type 32-bit floating point Failure detect and fan con- 5-pin female Memory 32 k words SRAM, 2 x 8 kB EEPROM trol failure relay: p1 = COM, p2 = NO, ADCs Two channel, 18 bit sigma-delta converters p3 = NC optional fan: p4 = -, p5 = +24 V DACs Eight channel, 18 bit sigma-delta converters Mains 3-pin IEC Sample frequency 48.8 kHz PSU Signal processing9 • pre-delay (< 335 ms @ 32 bit float) • equalizer and compensation filtering Mains voltage (+5/-10%)11 230 or 115 V • compressor and noise gate Mains fuse(s) 2 x 1.6 A (slow type) • volume and analog pre-gain • ambient noise level dependent gain Power consumption12 28 VA (idle) / 150 VA (full load) adaptation (‘fail-safe’) Power Factor 0.70 • eight output filters • high resolution output channel delays Max mains 12 A short-time peak (@ 230 V) (ΔT = 10.2 µs) inrush current Control unit Mechanical Network interface type Serial full-duplex RS-485, 19.2 kbaud, opti- Dimensions (H x W x D)14 670 x 134 x 186 mm cally isolated Weight 16 kg Maximum number of units10 126 Default color Silver Transducers 6 x 4” loudspeaker 2 x 10 mm ferrofluid cooled tweeter, co- axially mounted
  • 11. LBC 3251/00 Intellivox 1b Active Line Array Loudspeaker | 11 Environmental Ordering Information Operating temperature13 -15 ºC to +40 ºC (5 ºF to +104 ºF) LBC 3251/00 Intellivox 1b Active Line LBC3251/00 Array Loudspeaker Storage temperature -40 ºC to +70 ºC (-40 ºF to +158 ºF) active line array loudspeaker with unrivalled Relative humidity <95% acoustical properties Notes: Accessories 1. Measured outside under semi-anechoic ‘full-space’ LBC 3260/00 WinControl Software LBC3260/00 conditions with typical filter and delay settings unless A 32 bit Windows-compatible program for stated otherwise. configuring, testing and monitoring Intellivox. 2. Single transducer only, from 1/3 octave averaged data at 1 m. Actual measured frequency response of LBC 3261/00 Intellivox Dual Lobe LBC3261/00 complete array is depending on the actual signal Software processing parameters and air absorption (at larger Dual Lobe Software distances). Only low frequency –3 dB point is LBC 3262/00 Ambient Microphone and LBC3262/00 specified for complete array (‘full-space’). Temperature Sensor 3. Continuous level: rms level measured with SLM (slow, Ambient Microphone and Temperature Sen- A-weighed) with pink noise source level just below sor DLC input limiter threshold. Peak level: the maximum short-term A-weighed rms sound pressure level LBC 3270/00 Wall Mounting Bracket 90° LBC3270/00 measured with a SLM and a pulsating pink noise Bracket 90° source. LBC 3271/00 Wall Mounting Bracket 45° LBC3271/00 4. Settings: Elevation angle = 0 deg, Opening angle = 15 Bracket 45° deg, Focus distance = 10 m. 5. Opening angle -6 dB, average value 1k - 4kHz octave band. 6. Opening angle -6 dB, typical values, only valid in the far-field (d > approx. 5 m). 7. For this measurement the signals at all power amplifier outputs are summed together. Measured as the A-weighed difference (in dB) between the maximum rms level (with pink noise input signal) and the noise output (with no input signal present). 8. Specs valid for default type 3 input board, 0 dBu = 0.775 V rms . Dual-line input available as an option. 9. “Dual lobe’ and ‘Extended pre-delay’ (up to 2684 ms) available as a DSP software / hardware option. 10. Maximum number that can be connected to one RS-485 subnet, multiple subnets can be controlled by one host PC. 11. Mains voltage can be selected on the IEC inlet, accessible from the outside of the unit. 12. Defined as the rms mains current multiplied by the rms mains voltage under normal operating conditions. ’Full load’ figures are maximum values measured with a pulsating pink noise input signal. 13. With frost protection and installed ambient temperature sensor. Outdoor versions available upon request. Without frost protection, lower limit: 0 °C. 14. Depth of enclosure only (including heatsink), without mounting brackets. www.boschsecurity.com
  • 12. 12 | LBC 3251/00 Intellivox 1b Active Line Array Loudspeaker Americas: Europe, Middle East, Africa: Asia-Pacific: Represented by Bosch Communications Systems Bosch Security Systems B.V. Robert Bosch (SEA) Pte Ltd 12000 Portland Avenue South P.O. Box 80002 11 Bishan Street 21 Burnsville, Minnesota 55337, USA 5600 JB Eindhoven, The Netherlands Singapore 573943 Phone: +1-800-392-3497 Phone: + 31 40 2577 284 Phone: +65 6571 2600 Fax: +1-800-955-6831 Fax: +31 40 2577 330 Fax: +65 6571 2698 audiosupport@us.bosch.com emea.securitysystems@bosch.com apr.securitysystems@bosch.com www.boschsecurity.com www.boschsecurity.com www.boschsecurity.com © Bosch Security Systems Inc. 011 | Data subject to change without notice T2345690379 | Cur: en-US, V19, 27 Jan 2011