Bosch Premium Sound Loudspeaker


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The LC2-PC30G6-4 is a 4-inch two-way Premium-sound Ceiling Loudspeaker which provides; wide dispersion, high efficiency, high maximum output, ease-of-installation, and wide-range reproduction of music and voice. It consists of a baffle assembly, grille, back-can enclosure, 4-inch coax two-way loudspeaker and internal output-power matching transformer. The loudspeaker features a waveguide coupled titanium coated dome tweeter. The rear enclosure provides an optimum internal volume for extended low frequency performance. The loudspeaker utilizes a second order crossover network at 3.3 kHz, with a comprehensive protection circuit to protect the network, woofer, and tweeter drivers from excessive power levels. The loudspeaker can be installed optionally with the LC2-PC60G6-10 ceiling subwoofer to enhance the low frequency reproduction down to 45 Hz


Voice alarm loudspeaker Voice alarm loudspeakers are specifically designed for use in buildings where performance of systems for verbal evacuation announcements is governed by regulations. The LC2-PC30G6-4 is designed for use in voice alarm systems and is compliant with British Standard BS 5839-8 and EN 60849.


 The loudspeaker has built-in protection to ensure that, in the event of a fire, damage to the loudspeaker does not result in failure of the circuit to which it is connected. In this way, system integrity is maintained; ensuring loudspeakers in other areas can still be used to inform people of the situation. It is standard fitted with a back-can enclosure to increase protection of the cable termination. The loudspeaker has an emergency compliant ceramic screw-terminal block and thermal fuse.

Maximum power :50 W Rated power 30 / 15 / 7.5 / 3.75 W (1.88 W only, 70 V). 

Sound pressure level at 30 W / 1 W (1 kHz, 1 m) 101 / 86 dB (SPL)

Effective frequency range (-10 dB) 65 Hz to 20 kHz

Coverage (conical) 130 

Rated voltage 70 V or 100 V 

Rated impedance 167 or 333 or 8 ohm 

LF transducer 100 mm (4 in.) Polypropylene cone

HF transducer 19 mm (0.75 in.) Ti Mylar laminate 

Connector 3-pole screw terminal block


Diameter 210 mm (8.3 in)

Maximum depth 176 mm (6.9 in) 

Ceiling thickness 4 to 25 mm (0.16 to 1.00 in.)

Mounting cut-out 183 + 5 mm (7.188 + 0.20 in.)

Baffle ABS (UL94V0) 

Back-can Zinc-plated steel

Grille Powder coated steel

Weight 2.7 kg (6.0 lb) 

Color White (RAL 9010)


Operating temperature -25 C to +55 C (-13 F to +131 F)

Storage temperature -40 C to +70 C (-40 F to +158 F) 

Relative humidity <95%

See Also