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Bosch pro horn speaker system allows many different actuators to be installed in various horn speaker housings. The system includes four types of horn speaker shells, three of which are round speakers with opening diameters of 255, 380 and 510 mm respectively. The other is a rectangular speaker with an opening of 390 x 235 mm. The basic function actuator (separately ordered) is installed inside the horn loudspeaker, and the connecting cable passes through the cable seal plug on the cover plate and is connected out. This makes the speaker bugle/actuator an ideal choice for outdoor sound amplification applications because it prevents fluid from splashing in. The speaker offers three types of actuators: 15w, 30w, and 50w (for 100v circuits only). See the separate data tables. The horn loudspeaker maximizes the modular concept of the standard components. Fixed actuator screw with standard 1/8-inch thread (1/8-inch - 18 unef-2a). The shape design of the shell is exquisite, making the loudspeaker unique and unique. The inner surface of the cover plate can be fitted with an optional circuit/speaker monitor board (and emergency connection adapter). In addition, the speaker is equipped with additional holes for loop wiring (if the loop is used, additional optional cable sealing plug PG 13.5 provided must be used). These speakers are made of high strength flame retardant plastic and are lightweight and strong. This durable material not only protects against ultraviolet rays, but also against corrosive environment and most industrial chemicals. The color of the loudspeaker (including the bracket) is light gray. Strong steel mounting bracket (ST - 37-2 DIN 1652) allows users to easily install horn speakers and adjust direction. Certificates and recognition waterproof and dustproof conform to IEC 60529, IP 65 standard (all types) flame retardant UL 94 Vo standard installation/configuration 155 307 387 199 255 10.04 7.83 15.24 12.09 6.10 LBC 3403/16 size (unit: mm [in]) 199 155 422 380 14.96 16.61 6.10 7.83 LBC 3404/16 dimension (unit: LBC 3405/16 size (unit: mm [inch]) 222 8.74 210 3 holes 11 dia. 3 holes 0.43 dia. 2 x 70 2 x 2.76 11 0.43 20 0.79 30 1.18 8.27 all types of mounting bracket dimensions (unit: 3403/16 mm [in]) order information LBC horn speaker, circular, 10 inches (not including actuator), 10 inches, no driver device, rounded, high-strength material, ABS suits with horn exciter LBN9000/00 (15 W), 9001/00 (30 W) and LBN9003 LBN / 00 (50 W), light gray RAL 7035. Order no. 3404/16 LBC3403/16 LBC the trumpet loudspeaker, circular, 15 inches (not including actuator), 14 inches, no driver device, rounded, high-strength material, ABS suits with horn exciter LBN9000/00 (15 W), 9001/00 (30 W) and LBN9003 LBN / 00 (50 W), light gray RAL 7035. Order no. 3405/16 LBC3404/16 LBC the trumpet loudspeaker, circular, 20 inches (not including actuator), 20 inches, no driver device, rounded, high-strength material, ABS suits with horn exciter LBN9000/00 (15 W), 9001/00 (30 W) and LBN9003 LBN / 00 (50 W), light gray RAL 7035. Order no. 3406/16 LBC3405/16 LBC horn speaker, rectangular, 9 x 15 inches (not including actuator), 15 x 9 inches, no driver device, rectangular, high-strength ABS materials, suitable for horn and exciter LBN9000/00 (15 W), 9001/00 (30 W) and LBN9003 LBN / 00 (50 W), light grey color RAL 7035. 1256/00 order number LBC3406/16 hardware accessories LBC EVAC connection adapter emergency connection adapter, temperature fuse with pre-installed 3 pin screw ceramic porcelain connector, can be 100 V main connection lines with the speaker in series (100) per unit. Lbc1256/00 LBN 9000/00, 15 W horn starter, 15 W, for use with lbc3403/16 (10 inches), lbc3404/16 (14 inches), lbc3405/16 (20 inches) and lbc3406/16 (15 x 9 inches) horns. LBN9000/00 LBN 9001/00, 30w horn starter, 30w, for use with lbc3403/16 (10 inches), lbc3404/16 (14 inches), lbc3405/16 (20 inches) and lbc3406/16 (15 x 9 inches) horns. Lbn9001/00 LBN 9003/00, LBN 9003/00, 50 W, for use with lbc3403/16 (10 inches), lbc3404/16 (14 inches), lbc3405/16 (20 inches) and lbc3406/16 (15 x 9 inches) horns. Order number LBN9003/00