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Bosch LC4-UC24E

EN54-24 ceiling speaker with wide coverage. 6", 24 watts, 100 volt line & 8 ohm. EN54-24 compliant when optional back box / fire dome is used.

List price Ex. VAT: £150.00


The Bosch LC4-UC24E ceiling loudspeaker can be used for a wide variety of indoor public address applications to provide excellent speech and music quality.

Compliant with EN54-24 and BS5839 part 8 when used with the optional LC4CBB or LC4MFD back box / fire dome. (see related products)

There are 3 variants in the range rated at 6w, 12w, and 24w all with the same 200mm diameter grille. The LC4UC24E is rated at 24 watts, 100 volt line and 8Ω.

The new CosCone driver technology used in this range, delivers outstanding sound quality from a small sized unit, ensuring a wide and equal spread of all octave frequencies and eliminates high‑frequency beaming.

Fewer loudspeakers are needed to cover a given area, and the noticeable “fading” that can occur as a listener walks from one loudspeaker to another area is eliminated.

The LC4 range also includes a back‑box and metal fire‑dome - the use of either ensures the Bosch LC4-UC24E will comply with EN54-24 and BS5839 part 8.


Additional Information




Ceiling loudspeaker

Maximum power


Rated power

24 W (24/12/6/3 W)

SPL at 6 W power / 1 W (1 kHz, 1 m)

101 dB / 87 dB (SPL)

Opening angle at 1 kHz / 4kHz (-6 dB)

180° / 180° 

Effective frequency range(-10 dB)

65 Hz to 20 kHz 

Rated voltage

13.9 / 70 / 100 V

Rated impedance

8 / 208 / 417 Ohm

Electrical connection

4‑way screw terminal block

Acceptable wire gauge

0.5 – 3 mm²


200 mm (7.87 in)

Mounting cut‑out

162 mm (6.38 in)

Min./Max. ceiling thickness

5 to 50 mm (0.19 to 1.97 in)

Maximum depth

70 mm (2.75 in)

Material (Loudspeaker unit)

 ABS (V 0)

Material (front grille)

 Steel mesh with ABS (V 0) rim


 990 g / (2.18 lb)

Colour (front grille)

 White (RAL 9003)

View FileBosch LC4 Installation guide    Size: (1.65 MB)
View FileBosch LC4 commercial brochure    Size: (528.44 KB)
View FileBosch LC4 Datasheet    Size: (477.45 KB)
Product video for Bosch LC4-UC24E