LB1-UM20E-L
Premium-sound aluminium cabinet loudspeaker, white, 20W
20 / 10 / 5 / 2.5 W | Aluminium enclosure and grille | 88 dB SPL (1W, 1m) | 90 Hz to 20 kHz | EN54-24
LB1-UM20E-L
Premium-sound aluminium cabinet loudspeaker, white, 20W
20 / 10 / 5 / 2.5 W | Aluminium enclosure and grille | 88 dB SPL (1W, 1m) | 90 Hz to 20 kHz | EN54-24
Bosch LB1-UM20E-L Product Highlights
Explore the key capabilities of the Bosch LB1-UM20E-L cabinet loudspeaker.
High-Fidelity Two-Way
5-inch woofer and 1-inch tweeter: 88 dB at 1 W, up to 101 dB, 90 Hz to 20 kHz.
EN54-24 Voice Alarm
EN54-24 and BS 5839-8; ceramic terminal, thermal fuse and heat-resistant wiring.
IP65, Indoor and Outdoor
Aluminium enclosure, IP65 and rated for wind force Bft 11.
Rotary Tap Switch
20 / 10 / 5 / 2.5 W on 70 V or 100 V, or direct 8 ohm, set in the base.
Bracket Supplied
Adjustable wall bracket included; fits the LBC1259 floor stand for events.
Self-Restoring Protection
Overload protection resets itself; room inside for a supervision board.
Premium Sound Speaker
The Premium‑sound range of cabinets is intended for clear reproduction of speech, foreground and background music to be used in general indoor and outdoor applications.
Protection
The loudspeakers have built‑in protection to ensure that in the event of a fire damage does not cause failure of the connected circuit. In this way, system integrity is maintained.
Voice Alarm
The LB1‑UM20E‑L are designed for voice alarm systems for use in buildings, where the performance of Public Address systems is subject to official regulations.
Key specs
- Taps 20 / 10 / 5 / 2.5 W (70 / 100 V), 8 ohm input
- Max 30 W
- 101 / 88 dB SPL at rated / 1 W (1 kHz, 1 m)
- 90 Hz to 20 kHz (-10 dB)
- Opening angle 174° / 136° H, 127° / 141° V (1 / 4 kHz)
- 5-inch woofer, 1-inch dome tweeter
- 274 x 160 x 180 mm, 3.88 kg
- Aluminium enclosure and grille, ABS end caps
- Ceramic loop-through terminal, thermal fuse
- IP65, wind force Bft 11
- White RAL 9010
- EN54-24, BS 5839-8
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Electrical |
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Description |
Premium‑sound Cabinet Loudspeaker |
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Maximum power |
30 W |
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Rated power (PHC) |
20 W |
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Power tapping |
20 / 10 / 5 / 2.5 W |
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Sound pressure level at rated power / 1 W (1 kHz, 1 m) |
101 dB / 88 dB (SPL) |
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Effective frequency range (-10 dB) |
90 Hz to 20 kHz |
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Opening angle at 1 kHz / 4 kHz (-6 dB) |
Horizontal: 174° / 136° Vertical: 127° / 141° |
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Rated input voltage |
12.65 / 70 / 100 V |
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Rated impedance |
8 / 250 / 500 ohm |
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Connector |
3‑pole screw block |
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Mechanical |
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Dimensions |
274x160x180mm 10.78x6.29x7.08in |
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Loudspeaker diameter |
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Woofer |
134.5 mm (5 in) |
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Dome tweeter |
25.4 mm (1 in) |
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Material |
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Cabinet |
Aluminum |
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Front grille |
Aluminum |
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Top and bottom |
ABS |
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Color |
White |
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Weight |
3.88 kg (8.55 lb) |
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Environmental |
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Operating temperature |
-25 ºC to +55 ºC (-13 ºF to +131 ºF) |
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Storage temperature |
-40 ºC to +70 ºC (-40 ºF to +158 ºF) |
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Relative humidity |
<95% |
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Know before you buy
Quick answers about the LB1-UM20E-L, and how it compares.
Which colours are available?
The same loudspeaker in two colours: LB1-UM20E-D in charcoal or black and LB1-UM20E-L in white.
Which cabinet loudspeaker do I need?
| Model | Power | Build | SPL 1 W, 1 m | Frequency range | Use |
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| LB1-UW06-FD1 / LB1-UW06-FL1 | 6 W | MDF, cloth front | 91 dB | 185 Hz to 17 kHz | Indoor |
| LB1-CW06-D1 / LB1-CW06-L1 | 6 W | MDF corner cabinet | 91 dB | 180 Hz to 20 kHz | Indoor corners |
| LB10-UC06-FL | 6 W | Flat ABS | 91 dB | 145 Hz to 18 kHz | Indoor |
| LB10-UC06-L / LB10-UC06V-L | 6 W | ABS, angled front; V with volume control | 91 dB | 145 Hz to 18 kHz | Indoor |
| LB7-UC06E | 6 W | ABS, metal grille, EN54-24 | 93 dB | 170 Hz to 20 kHz | Voice alarm |
| LB8-UM06E | 6 W | Square metal, EN54-24 | 93 dB | 210 Hz to 18 kHz | Voice alarm |
| LB1-BW12-D1 / LB1-BW12-L1 | 12 W | MDF, bidirectional | 86 dB | 140 Hz to 20 kHz | Corridors |
| LB2-UC15-D1 / LB2-UC15-L1 | 15 W | ABS, aluminium grille, IP65 | 87 dB | 95 Hz to 20 kHz | Indoor and outdoor |
| LB2-UC30-D1 / LB2-UC30-L1 | 30 W | ABS, aluminium grille, IP65 | 90 dB | 100 Hz to 19 kHz | Indoor and outdoor |
| LB1-UM20E-D / LB1-UM20E-L | 20 W | Aluminium, IP65, EN54-24 | 88 dB | 90 Hz to 20 kHz | Indoor, outdoor, voice alarm |
| LB1-UM50E-L | 50 W | Aluminium, IP65, EN54-24 | 91 dB | 90 Hz to 20 kHz | Indoor, outdoor, voice alarm |
Codes ending D are black or charcoal, L are white. For evacuation systems pick the EN54-24 LB1-UM models.
What does EN54-24 mean?
EN 54-24 is the European standard for loudspeakers in voice alarm (evacuation) systems. Certified models show EN54-24 in the banner at the top of their page; the others show Non-EN54 and suit commercial public address and music. For an evacuation system, use EN54-24 loudspeakers throughout.
What do the power taps mean?
Each loudspeaker can be set to one of its power taps, for example 6 / 3 W. Choose a lower tap for small or quiet areas and a higher tap for large or noisy ones. Add up the taps of every loudspeaker on a line: the amplifier must deliver at least that total.
Many 6 W ceiling loudspeakers are tapped down to 3 W, 1.5 W or 0.75 W in the field; in smaller or low-noise areas 3 W is more than enough.
Can I get the loudspeakers in a custom colour?
Yes. Bosch paints loudspeakers in any RAL colour to blend in with the architecture of hotels, malls, airports and similar projects. The paint is durable, suits indoor and outdoor use, keeps the EN54 certification and has a 3-year warranty. Tell us the models, quantities and RAL code.
Who supplies Bosch loudspeakers in the UAE, and what warranty do I get?
Protechtors General Trading LLC (hik.ae) is an authorized partner of Bosch, Dynacord and Electro-Voice in the UAE, so everything we supply is genuine and comes with a 3-year warranty. Warranty is carry-in: bring the unit to our office in Dubai and after inspection it is repaired or replaced as needed.
We supply Bosch loudspeakers across the UAE and support you after the sale. Prices are quoted per project: tell us what you need and we will send a quote.