Communications Systems | LBC 34xx/12 Horn Loudspeakers
LBC 34xx/12 Horn Loudspeakers
www.boschsecurity.com
u High efficiency drivers
u Up to 45 W (max. power)
u Wide opening angle
u Excellent speech reproduction
u Simple power setting
Bosch high-efficiency horn loudspeakers provide excellent speech reproduction and sound distribution for a wide scope of outdoor applications. They are ideal for sports grounds, parks, exhibitions, factories and swimming pools.
System overview
The LBC 3481/12 is a circular horn loudspeaker, and the LBC 3491/12 is a rectangular model. Both are 10 W, and are made from ABS.
The LBC 3492/12 is a circular, 20 W horn loudspeaker with a large horn measuring 354 mm in diameter. It is made from a combination of aluminum with ABS for optimum strength and low weight. The edge of the horn is covered with a PVC profile for protection against impact damage.
The LBC 3493/12 is a circular, 30 W horn loudspeaker with a large horn measuring 400 mm in diameter. It is made from a combination of aluminum with ABS for optimum strength and low weight. The edge of the horn is covered with PVC for protection against impact damage.
Functions
All four models are for direct connection to a 100 V line output and are finished in light grey (RAL 7035). The horns are water and dust protected.
The horn loudspeakers include a 100 V transformer with taps on the primary winding to allow different power settings. Nominal full-power, half-power or quarter-power radiation (in 3 dB steps) can easily be selected by connecting the amplifier output to the appropriate tap. A 2 m four-core cable is fitted to the horns. Each core is a different color, and is connected to one of the primary taps on the transformer.
The horn loudspeakers are supplied complete with sturdy adjustable mounting brackets, allowing the sound beam to be accurately directed.
Certifications and approvals
All Bosch loudspeakers are designed to withstand operating at their rated power for 100 hours in accordance with IEC 268-5 Power Handling Capacity (PHC) standards. Bosch has also developed the Simulated Acoustical Feedback Exposure (SAFE) test to demonstrate that they can withstand two times their rated power for short durations. This ensures extra reliability under extreme conditions, leading to
2 | LBC 34xx/12 Horn Loudspeakers
higher customer satisfaction, longer operating life, and much less chance of failure or performance deterioration.
Safety |
acc. to EN 60065 |
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Self-extinguishing |
acc. to UL 94 V0 |
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Water and dust protection |
acc. to EN 60529 IP65 |
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Region |
Certification |
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Europe |
CE |
Declaration of Conformity |
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CE |
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Installation/configuration notes
LBC 3481/12
Dimensions in mm (in)
Circuit diagram
Polar diagram (measured with pink noise)
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125 |
250 |
500 |
1 |
2 |
4 |
8 |
|
Hz |
Hz |
Hz |
kHz |
kHz |
kHz |
kHz |
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SPL 1.1 |
- |
- |
94 |
10 |
10 |
98 |
86 |
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3 |
5 |
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SPL |
- |
- |
104 |
11 |
11 |
10 |
96 |
max. |
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3 |
5 |
8 |
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Q-factor |
- |
- |
1.7 |
3.5 |
7.8 |
25. |
52. |
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7 |
5 |
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Efficien |
- |
- |
1.82 |
7.0 |
5.1 |
0.3 |
0.0 |
cy |
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8 |
3 |
1 |
1 |
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H. angle |
- |
- |
180 |
16 |
95 |
50 |
30 |
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0 |
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V. angle |
- |
- |
180 |
16 |
95 |
50 |
30 |
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0 |
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Acoustical performance specified per octave
LBC 3491/12
Frequency response |
Dimensions in mm (in) |
3 | LBC 34xx/12 Horn Loudspeakers
Circuit diagram
Frequency response
|
125 |
250 |
500 |
1 |
2 |
4 |
8 |
|
Hz |
Hz |
Hz |
kHz |
kHz |
kHz |
kHz |
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SPL 1.1 |
- |
- |
99 |
10 |
11 |
10 |
97 |
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8 |
1 |
6 |
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SPL |
- |
- |
109 |
11 |
12 |
11 |
10 |
max. |
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8 |
1 |
6 |
7 |
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Q-factor |
- |
- |
2.7 |
6.5 |
15. |
40. |
75. |
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8 |
7 |
9 |
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Efficien |
- |
- |
3.72 |
12. |
10 |
1.2 |
0.0 |
cy |
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3 |
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3 |
8 |
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H. angle |
- |
- |
180 |
90 |
55 |
40 |
30 |
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V. angle |
- |
- |
180 |
13 |
80 |
45 |
15 |
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0 |
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Acoustical performance specified per octave
Polar diagram vertical (measured with pink noise)
Polar diagram horizontal (measured with pink noise)
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