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Lb1-bw12-x is a beautiful and inexpensive 12 W two-way speaker box suitable for indoor use. The reflector design of the loudspeaker makes the opening Angle very large, so it is very suitable for use in the corridor. The keyhole on the back panel is convenient for quick and easy wall installation. The speakers come in black or white. The MDF (medium density fiberboard) housing has a solid base function and is covered with durable and easy-to-clean vinyl film, providing both white and black styles. The front panel is made of ABS material and is covered with fine color matching speakers. The speaker box has two speaker drivers for a double tone basin, mounted on a tilted reflector plate, and can produce a large open Angle. This model is suitable for long corridor, such as shopping arcade. All Bosch speakers are certified to meet IEC 268-5 power handling capacity (PHC) standards and can operate continuously for 100 hours at rated power. Bosch has also conducted simulated acoustic feedback exposure tests to ensure they can withstand twice the rated power in a short period of time. This ensures high reliability in extreme conditions, improves customer satisfaction, extends service life, and significantly reduces the chance of failure or performance degradation. Three key holes in the panel after installation/configuration in accordance with EN 60065 standard allow users to install walls easily and quickly. The rear panel is equipped with convenient and easy to use four-way push - in junction box, suitable for field wiring. The junction box is connected by a 100v transformer pick-up power tap in the sound column. This allows the user to select the rated full power, half power, or quarter power radiation (increase by 3 dB). Size (unit: Mm) 3 W ? ~ circuitry frequency response directed graph (pink noise is used to measure the technical specifications of electrical specifications 18 W * maximum power rating 12/6 of 12 W / 1 W / 3 W sound pressure level (1 kHz, 1 meter) 97/86 dB (SPL) effective frequency range (140 Hz and 20 kHz - 10 dB) 1 kHz / 4 kHz (6 dB) when the open Angle of 270 ° 165 ° / rated input voltage 100 V rated impedance of 833 ohms interface 4 needle push type terminal box * technical performance data in accordance with IEC 60268-5 standard mechanical size high (deep) x width x 240 x 238 x 133 mm (9.4) X 9.3 x 5.24 inches) weight 1.5 kg (3.3 lb) color black (D) or (L) speakers/white cloth (D) accord with standard of RAL 9004 amp/fabric (L) in line with the RAL 9010 / RAL 7044 standard specification work environment temperature 25 DHS to 55 DHS C + C (13 DHS F to + 131 DHS F) storage temperature and 40 DHS C to + 70 DHS C (40 DHS F - to + 158 DHS F) relative humidity < 95% Order information LB1? bw12-d two-way speaker dual-directional speaker box, 12 W, front cover MDF outer shell with exquisite woven cloth, black coating, with 3 key hole for wall installation. Order no. Lb1-bw12-d lb1-bw12-d dual directional speaker box, 12w, MDF outer shell covered with fine woven cloth at the front, white coating, with 3 key hole for wall installation. Order number LB1 - BW12 - L