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Premium Cabinet Loudspeakers
LB3-PC250 and LB3-PC350
en Installation Note
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LB3-PC250 / LB3-PC350 en 3
Bosch Security Systems B.V. IN-LB3 | V1.0 | 2011.02
Important safeguards
Always mount the loudspeakers securely with the recommended bracket(s).
If a generic bracket is used, use the inserts with the load distributed in the same way as with
the recommended bracket.
Only use the pole mount vertically with a maximum deflection of the vertical of 20 degrees.
Do not place a heat source or an open flame on or near the loudspeaker.
The mounting materials marked with an asterisk (*) in the drawings are not supplied, but are
generally available in your local hardware store. Make sure that the minimum tensile strength
of these mounting materials (e.g. suspension chain, suspension cable, safety cord and
shackle[s]) is 1,500 N/mm2. Always use a safety tether/ safety cord.
Box contents Mounting options 1 and 2 (mounting material is NOT
included)
Removing the splash proof cover WLX I and WLX II connection
1
2
X11: LBB4441
X10: LBB4441
X1: LBB4442
X100: LBB4443
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4 en LB3-PC250 / LB3-PC350
IN-LB3 | V1.0 | 2011.02 Bosch Security Systems B.V.
SPEAKON connection Direct connection EN 54-24
LOW Z connection
Wall mounting (option 1) Wall mounting (option 2)
3 : 1
3 : 1
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LB3-PC250 / LB3-PC350 en 5
Bosch Security Systems B.V. IN-LB3 | V1.0 | 2011.02
Ceiling mounting (option 1) EN 54-24 Ceiling mounting (option 2) EN 54-24
Attaching the safety tether to the safety tether mounting
point at the rear
Installing the tripod
Stacking the loudspeakers (max. 2 loudspeakers - use a
strap)
Dimensions
5 : 1 5 : 1
D
H
W
LB3-PC250
595 mm (23,4") 410 mm (16,1") 367 mm (16,9")
LB3-PC350
720 mm (28,4") 470 mm (18,5") 420 mm (16,6")
WHD
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IN-LB3 | V1.0 | 2011.02 Bosch Security Systems B.V.
Technical data
LB3-PC250 - Octave and 1/3 octave related measure results
Tab le 1 Octave band opening angles
Tab le 2 Octave band sensitivity of 250 W / 100 V-tap
Tab le 3 Tot al oct a ve S P L
Octave band opening
Frequency (Hz) 125 250 500 1000 2000 4000 8000
Horizontal opening angle 360 183 152 100 77 87 86
Vertical opening angle 360 180 162 70 66 44 32
Octave band sensitivity
Frequency (Hz) 125 250 500 1000 2000 4000 8000
Octave SPL 1 W / 1 m 92.8 93.3 93.6 94.7 97.0 96.8 98.0
Total octave SPL A-weighted (in dBSPL) C-weighted (in dBSPL)
Total octave SPL 1 W / 1 m 93.7 95.1
Total octave SPL Pmax / 1 m 117.7 119.1
LB3-PC250 - Frequency and impedance graphs
Frequency response on 0-degrees axis measured with 1 W at 1 m.
Connected to 250 W/100 V-tap and measured with 1/3 octave smoothing.
Frequency
dB SPL
60
70
80
90
10 0
11 0
1 0 10 0 1 0 0 0 10 0 0 0 10 0 0 0 0
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LB3-PC250 / LB3-PC350 en 7
Bosch Security Systems B.V. IN-LB3 | V1.0 | 2011.02
LB3-PC250 - Polar diagrams
Horizontal polar diagram (high frequency). Normalized
at 0-degrees axis.
Horizontal polar diagram (low frequency). Normalized at
0-degrees axis.
Vertical polar diagram (high frequency). Normalized at 0degrees axis.
Vertical polar diagram (low frequency). Normalized at 0degrees axis.
1000 2000 4000 8000
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IN-LB3 | V1.0 | 2011.02 Bosch Security Systems B.V.
LB3-PC350 - Octave and 1/3 octave related measure results
Tab le 4 Octave band opening angles
Tab le 5 Octave band sensitivity of 250 W / 100 V-tap
Tab le 6 Tot al oct a ve S P L
Octave band opening
Frequency (Hz) 125 250 500 1000 2000 4000 8000
Horizontal opening angle 360 183 152 100 77 87 86
Vertical opening angle 360 180 162 70 66 44 32
Octave band sensitivity
Frequency (Hz) 125 250 500 1000 2000 4000 8000
Octave SPL 1 W / 1 m 93.3 93.8 93.0 93.6 95.2 96.6 98.4
Total octave SPL A-weighted (in dBSPL) C-weighted (in dBSPL)
Total octave SPL 1 W / 1 m 93.3 95.3
Total octave SPL Pmax / 1 m 118.7 120.7
LB3-PC350 - Frequency and impedance graphs
Frequency response on 0-degrees axis measured with 1 W at 1 m.
Connected to 350 W/100 V-tap and measured with 1/3 octave smoothing.
Frequency
60
70
80
90
10 0
11 0
10 100 1000 10000 100000
dB SPL
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LB3-PC250 / LB3-PC350 en 9
Bosch Security Systems B.V. IN-LB3 | V1.0 | 2011.02
LB3-PC350 - Polar diagrams
Horizontal polar diagram (high frequency). Normalized
at 0-degrees axis.
Horizontal polar diagram (low frequency). Normalized at
0-degrees axis.
Vertical polar diagram (high frequency). Normalized at 0degrees axis.
Vertical polar diagram (low frequency). Normalized at 0degrees axis.
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Bosch Security Systems B.V.
Kapittelweg 10
4800 RA Breda
The Netherlands
www.boschsecurity.com
© Bosch Security Systems B.V., 2011
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