LS1-UC20E-1
Pendant sphere loudspeaker, 20W
20 / 10 / 5 / 2.5 W | ABS, metal grille | 86 dB SPL (1W, 1m) | 80 Hz to 20 kHz | EN54-24
LS1-UC20E-1
Pendant sphere loudspeaker, 20W
20 / 10 / 5 / 2.5 W | ABS, metal grille | 86 dB SPL (1W, 1m) | 80 Hz to 20 kHz | EN54-24
Bosch LS1-UC20E-1 Product Highlights
Explore the key capabilities of the Bosch LS1-UC20E-1 pendant loudspeaker.
Superb Speech and Music
Advanced filtering: 80 Hz to 20 kHz, up to 99 dB.
EN54-24 Evacuation
Certified for voice evacuation; the line stays up if the speaker burns.
IP65
Water and dust protected to IP65.
Hangs from Its Cable
5 m cable, easy to shorten, with suspension clamp.
Safety Cord Ready
Provision for an optional steel safety cord.
Wide Coverage
Opening angle 220° / 65° for high ceilings.
Key specs
- Taps 20 / 10 / 5 / 2.5 W (100 V), max 30 W
- 99 / 86 dB SPL at 20 W / 1 W (1 kHz, 1 m)
- 80 Hz to 20 kHz (-10 dB)
- Opening angle 220° / 65° (1 / 4 kHz)
- Ø 185 x 254 mm, 3 kg
- ABS UL 94 V0, metal grille
- Fixed 5 m 5-core cable, cable clamp
- Ceramic terminal, thermal fuse
- IP65
- White RAL 9010
- EN54-24, BS 5839-8
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Electrical |
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Rated power |
20 / 10 / 5 / 2.5 W |
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Sound pressure level at 20 W / 1 W (1kHz, 1 m) |
100 dB / 87 dB (SPL) |
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Sound pressure level at 20 W / 1 W (1kHz, 4 m) |
91 dB / 78 dB (SPL) |
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Opening angle at 1 kHz / 4 kHz (-6 dB) |
220° / 65° |
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Effective frequency range (-10 dB) |
75 Hz to 20 kHz |
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Rated voltage |
100V |
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Rated impedance |
20 W: 500 Ohm 10 W: 1000 Ohm 5 W:
2000 Ohm |
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Connector |
3‑pole screw terminal |
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Mechanical |
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Dimensions (D x L) |
185 x 300 mm (7.3 x 11.8 in.) |
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Weight |
3 kg (6.6 lb) |
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Color |
White (RAL 9010) |
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Material |
ABS |
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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 and transport temperature |
-40 ºC to +70 ºC (-40 ºF to +158 ºF) |
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Relative humidity |
<95% |
Know before you buy
Quick answers about the LS1-UC20E-1 , and how it compares.
Which sound projector or pendant loudspeaker do I need?
| Model | Type | Power taps | SPL 1 W | Frequency range | IP | EN54-24 |
|---|---|---|---|---|---|---|
| LBC3094/15 | Sound projector | 10 / 5 / 2.5 W | 94 dB | 140 Hz to 10 kHz | IP63 | No |
| LP1-UC10E-1 | Sound projector | 10 / 5 / 2.5 W | 86 dB | 75 Hz to 20 kHz | IP65 | Yes |
| LP1-UC20E-1 | Sound projector | 20 / 10 / 5 / 2.5 W | 87 dB | 75 Hz to 20 kHz | IP65 | Yes |
| LBC3095/15 | Pendant sphere | 10 / 5 / 2.5 W | 89 dB | 130 Hz to 20 kHz | IPx3 | No |
| LS1-UC20E-1 | Pendant sphere | 20 / 10 / 5 / 2.5 W | 86 dB | 80 Hz to 20 kHz | IP65 | Yes |
Sound projectors aim the sound where people are, such as walkways and platforms; pendant spheres hang from high ceilings in hypermarkets and halls.
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.
Who supplies Bosch loudspeakers in Pakistan, and what warranty do I get?
Electronic Security Company (ESCO) is the only authorized distributor of Bosch, Dynacord and Electro-Voice in Pakistan, so every Bosch loudspeaker is genuine and comes with a 3-year warranty. Warranty is carry-in: bring the unit to an ESCO office and after inspection it is repaired or replaced as needed.
We supply, design and install public address and voice alarm systems, with offices and stock in Karachi, Lahore, Islamabad and Rawalpindi and dealers across Pakistan.