Bosch Communications Systems | LBC3951/12 Ceiling Mount loudspeaker, 6 W, 4" LBC3951/12 Ceiling loudspeaker, 6 Watt , 4inch Size Buy Online Store Near Me

Functions

The LBC3951/12 has a perforated metal grille with a plastic surround, finished in an attractive off-white RAL color. The unobtrusive styling of this loudspeaker complements today’s interior lighting. The loudspeaker features a very wide opening angle, which means fewer units are required to cover a given area. The wide frequency range means better speech and music reproduction. The unit is supplied with a 100 V matching transformer with taps on the primary winding for full-power, half-power, quarter-power and eighth-power radiation. The loudspeaker (with special treated paper cone) is IPx4 water protected from the front and can be applied in humid environments, for example in bathrooms, saunas, atriums and swimming pool areas.

Certifications and approvals

All plastic parts are manufactured from self- extinguishing high-impact ABS material (according to UL 94V0).

Quality assurance

All Bosch loudspeakers are designed to withstand operating at their rated power for 100 hours in accordance with IEC 60268-5 Power Handling Capacity (PHC) standards. Bosch has also developed the Simulated Acoustical Feedback Exposure (SAFE) test to demonstrate that they can withstand two times their rated power for short durations. This ensures improved reliability under extreme conditions, leading to higher customer satisfaction, longer operating life, and lessens the chance of failure or performance deterioration.

• Safety : acc. to EN 60065
• Water protection : acc. to EN 60529, IPx4

Region Regulatory compliance/quality marks

• Europe : CE DECL EC LBC3951_12

Installation/configuration notes

Installation is easy with integral clips that securely hold the ceiling loudspeaker in its cut-out. Ceilings from 9 to 25 mm thick can be accommodated. A template is also provided for accurately marking the cutout in ceiling panels. Wiring is via a connection block with push-type terminals, making installation possible without using any special tools. The transformer is delivered wired for 6 W rated output power, but can easily be changed for other connections using the color-coded wires and terminal block.

Polar diagram (low frequency part) Octave band sensitivity*

Octave SPL 1W/1m

• 125 Hz : 84.9
• 250 Hz : 88.5
• 500 Hz : 84.8
• 1000 Hz : 87.0
• 2000 Hz : 91.0
• 4000 Hz : 92.2
• 8000 Hz : 88.4

Total octave SPL 1W/1m | Total octave SPL Pmax/1m

• A-weighted : 87.2 , 94.3
• Lin-weighted : 88.2 , 95.4

Octave band opening angles

Horizontal / Vertical

• 125 Hz : 180 / 180
• 250 Hz : 180 / 180
• 500 Hz : 180 / 180
• 1000 Hz : 180 / 180
• 2000 Hz : 180 / 180
• 4000 Hz : 65 / 65
• 8000 Hz : 69 / 69

Acoustical performance specified per octave.* (all measurements are done with a pink noise signal; the values are in dB SPL).

Parts included

Quantity Component

• LBC3951/12 Ceiling loudspeaker - 1nos
• 145-mm circular template - 1nos

Technical specifications Electrical*

• Rated power : 6 / 3 / 1.5 / 0.75 W
• Sound pressure level at 6 W / 1 W (1 kHz, 1 m) :  95 dB / 87 dB (SPL)
• Sound pressure level at 6 W / 1 W (4 kHz, 1 m) : 98 dB / 90 dB (SPL)
• Effective frequency range (-10 dB) : 90 Hz to 18 kHz
• Opening angle at 1 kHz/4 kHz (-6 dB) : 180° / 65°
• Rated voltage : 100 V
• Rated impedance : 1667 ohm
• Connector : 2-pole push-in terminal block

Technical performance data acc. to IEC 60268-5

Mechanical

• Diameter : 160 mm (6.30 inch)
• Maximum depth : 95 mm (3.74 inch)
• Ceiling thickness : 9 to 25 mm (0.35 to 0.98 inch)
• Mounting cut-out : 145 mm (5.71 inch)
• Speaker diameter : 101.6 mm (4 in)
• Weight : 640 g (1.41 lb)
• Color : White (RAL 9010)
• Magnet weight : 101 g (3.57 oz)

Environmental

• Operating temperature : -25 ºC to +55 ºC (-13 ºF to +131 ºF)
• Storage and transport temperature : -40 ºC to +70 ºC (-40 ºF to +158 ºF)
• Relative humidity : <95%

Ordering information

LBC3951/12 Ceiling loudspeaker, 6 W, 4"

• Ceiling loudspeaker 6 W, circular metal grille with an ABS surround, integral clips for easy mounting, push terminal block, white RAL 9010. Order number LBC3951/12

Accessories

• LBC1256/00 Ceramic connection adapter Emergency connection adapter, 3-pole screw ceramic connector with a pre-mounted thermal fuse, to be installed in series with the 100 V primary connection of a loudspeaker unit, set of 100 pieces. Order number LBC1256/00