LBC 3700/00 - Speaker BOSCH - Free user manual and instructions
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| Product Type | High-power loudspeaker |
| Brand | Bosch |
| Model | LBC 3700/00 |
| Color | Light gray (RAL 7035) |
| Dimensions (H x W x D) | 260 x 442 x 287.5 mm (10.2 x 17.4 x 11.3 in) |
| Weight | 5 kg (11 lbs) |
| Maximum Power | 45 W |
| Rated Power | 30 W |
| Rated Voltage | 100 V |
| Frequency Range (-10 dB) | 125 Hz – 20 kHz |
| Sound Pressure Level (30 W, 1 m) | 112 dB SPL |
| Sound Pressure Level (1 W, 1 m) | 97 dB SPL |
| Horizontal Coverage Angle | 110° (nominal) |
| Vertical Coverage Angle | 125° (nominal) |
| Ambient Temperature Range | -25 °C to +55 °C |
| Protection | Water protected (suitable for outdoor use with minimum 10° downward tilt) |
| Enclosure Material | Plastic (white) |
| Mounting | Surface mount with bracket (included) |
| Power Taps Available | 1.5 W, 3 W, 3.75 W, 7.5 W |
Frequently Asked Questions - LBC 3700/00 BOSCH
What is the maximum power handling of the Bosch LBC 3700/00?
The maximum power handling is 45 W, with a rated power of 30 W at 100 V line.
How do I select the correct power tap for my speaker?
The speaker offers multiple power taps: 1.5 W (blue), 3 W (red), 3.75 W (yellow), and 7.5 W (orange). Connect the wire to the corresponding terminal on the transformer (common is black). Choose the tap that matches your system's power requirements.
What is the frequency response of this loudspeaker?
The effective frequency range (-10 dB) is 125 Hz to 20 kHz, making it suitable for speech and music reproduction.
Can the Bosch LBC 3700/00 be used outdoors?
Yes, it is water protected and designed for outdoor use. However, when mounting outdoors, ensure the speaker is tilted at an angle of at least 10° downwards to prevent water ingress.
What are the dimensions and weight of the speaker?
Dimensions: 260 x 442 x 287.5 mm (10.2 x 17.4 x 11.3 in). Weight: 5 kg (11 lbs).
How do I wire the speaker to a 100 V line?
Connect the 100 V line to the PHASE1 terminal and the common return to COMMON (black). Select the desired power tap by connecting the appropriate colored wire (see circuit diagram). Ensure the total wattage does not exceed the amplifier's capacity.
What is the sensitivity of the LBC 3700/00?
The sensitivity is 97 dB SPL (1 W, 1 m) and 112 dB SPL (30 W, 1 m).
What color is the speaker enclosure?
The standard color is light gray (RAL 7035), though the enclosure appears white in some documentation.
Does the speaker come with a mounting bracket?
Yes, the speaker includes a mounting bracket for surface installation. The manual shows a mechanical lifting/clamping mechanism for secure attachment.
How do I clean the Bosch LBC 3700/00?
Use a soft, dry cloth to clean the enclosure. Do not use water or solvents, as they may damage the water-protected coating. Ensure the speaker is disconnected from power during cleaning.
User questions about LBC 3700/00 BOSCH
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USER MANUAL LBC 3700/00 BOSCH
Polar diagram (vertical)
radar
| Angle (°) | 250 Hz | 500 Hz | 4000 Hz | 8000 Hz | |-----------|--------|--------|---------|---------| | 0 | 0 | 0 | 0 | 0 | | 30 | 1 | 1 | 1 | 1 | | 60 | 2 | 2 | 2 | 2 | | 90 | 3 | 3 | 3 | 3 | | 120 | 4 | 4 | 4 | 4 | | 150 | 5 | 5 | 5 | 5 | | 180 | 6 | 6 | 6 | 6 |Polar diagram (horizontal)
radar
| Frequency | Angle (°) | Value | | --------- | --------- | ----- | | 250 Hz | 0.0 | 8000 Hz | | 250 Hz | 3.0 | 600 Hz | | 250 Hz | 6.0 | 4000 Hz | | 250 Hz | 9.0 | 2000 Hz | | 250 Hz | 12.0 | 1000 Hz | | 250 Hz | 15.0 | 800 Hz | | 250 Hz | 18.0 | 600 Hz | | 500 Hz | 0.0 | 8000 Hz | | 500 Hz | 3.0 | 600 Hz | | 500 Hz | 6.0 | 4000 Hz | | 500 Hz | 9.0 | 2000 Hz | | 500 Hz | 12.0 | 1000 Hz | | 500 Hz | 15.0 | 800 Hz | | 500 Hz | 18.0 | 600 Hz | | 1000 Hz | 0.0 | 8000 Hz | | 1000 Hz | 3.0 | 600 Hz | | 1000 Hz | 6.0 | 4000 Hz | | 1000 Hz | 9.0 | 2000 Hz | | 1000 Hz | 12.0 | 1000 Hz | | 1000 Hz | 15.0 | 800 Hz | | 1000 Hz | 18.0 | 600 Hz | | 250 HZ | 0.0 | 8500 Hz | | 250 HZ | 3.0 | 750 Hz | | 250 HZ | 6.0 | 650 Hz | | 250 HZ | 9.0 | 550 Hz | | 250 HZ | 12.0 | 450 Hz | | 250 HZ | 15.0 | 350 Hz | | 250 HZ | 18.0 | 250 Hz | | ... | ... | ... |Frequency response
line
| Frequency (Hz) | SPL (dB) | | -------------- | -------- | | 1k | 90 | | 2k | 85 | | 4k | 80 | | 8k | 75 | | 16k | 70 |Circuit diagram
TECHNICAL PERFORMANCE DATA ACC. TO IEC 268-5
Loudspeakers
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White plastic spray canister with a conical cover and ventilation slots (no text or symbols visible)
Security Systems
EN | Instructions for use
LBC3700/00
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Diagram of a mechanical lifting or clamping mechanism inside a circular frame, showing rotational motion (no text or symbols)
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Technical diagram of a mechanical assembly with labeled components and directional arrow (no text or symbols)
