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Bosch pro horn speaker system consists of three types of actuators that can be installed in one of the compatible round and square horn speakers (provided separately, without exciter). The actuator is installed in the horn speaker using a standard 1/8-inch screw. All models have been treated against corrosion. System overview LBN 9000/00 is 15w exciter, LBN 9001/00 is 30w exciter. They are connected to the 100v line by pushing the forked terminal. LBN 9003/00 is a more powerful 50 W actuator. It is connected to the 100 V line through the screw terminal. Basic function all actuators are attached with a matching transformer that can perform power jumper. Refer to the circuit diagram on the next page. In addition, this feature allows the appropriate impedance matching for different amplifier types. These actuators are suitable for multiple horn loudspeakers and can be customized for different amplifying applications. Three round horn speaker (3405, 3403, 3404 and LBC LBC LBC is respectively 255, 380 and 510 mm in diameter) and a square horn speaker (LBC 3406, size is 380 x 235 mm) can use the driver. These horn speakers are made of high strength, lightweight flame retardant plastic coated in a light gray color. In addition, a strong steel mounting bracket is attached. See the separate data tables. 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 of the speaker under extreme conditions, improves customer satisfaction, extends service life, and significantly reduces the probability of failure or performance degradation. Install/configure LBN 9000/00 108 (4.25) 68 (2.68) dia.92 (3.62) 51 (2.00) 1/8 "-18 unef-2a size (mm [inch]