User manual ELECTRO-VOICE DMC 1122B

[. . . ] The 150 degree horizontal by 110 degree vertical dispersion pattern is beneficial in many applications requiring a wide coverage pattern. Furthermore, excellent loading is maintained to a low-frequency cutoff of 260 Hz. Architects' and Engineers' Specifications The horn shall be the compound diffraction type with outer housing of fiberglass, a zinc diecast front horn and phenolicconstructed inner horns. The low-frequency horn will be 52. 0 cm (20. 5 in. ) high by 26. 5 cm (10. 5 in. ) wide and 51. 0 cm (20. 0 in. ) deep, not including a driver. [. . . ] Net weight (less driver) shall not exceed 4. 9 kg (10. 8 lb). A separate high-frequency horn shall be provided, capable of individual rotation. The acoustical crossover shall be 1, 000 Hz. The loudspeaker shall be capable of satisfactory mechanical performance in the temperature range from -40°C (-40°F) to +71 °C (+161 °F) not subject to sunlight embrittlement and resistant to damage from weather, moisture, and fungus. A steel swivel bracket capable of either vertical or horizontal installations and a variety of adjustments is provided. The Electro-Voice FC100 is specified. Specifications: Horizontal Beamwidth: 150° @ 2 kHz (see Figure 2) Vertical Beamwidth: 110° @ 2 kHz (see Figure 2) Directivity Factor R (Q): 5. 2 @ 2 kHz Usable Low-Frequency Limit: 260 Hz Construction: Large fiberglass compression molding with gray finish, front horn of gray diecast zinc and phenolic compresion-molded inner horns with steel "U" bracket. Mechanical Construction of Driver: Threaded metal throats to accept a screw-in compound driver with a throat opening of 0. 7 inch to 1. 0 inch diameter and a standard 1 3/8-inch thread. The center frequency is noted on each plot. The wider plot on each chart is the horizontal polar (­) and the narrower plot is the vertical polar (­ ­ ­). Beamwidth A plot of the FC100's 6-dB-down total included beamwidth angle is shown in Figure 2 for each one-third-octave center frequency. Directivity The axial directivity factor R (formerly Q) of the FC100 horn was computed at each one-third-octave center frequency from the horizontal/vertical polars and is displayed in Figure 3. Installation As shipped, the "U" bracket is in position for vertical mounting. For horizontal dispersion, or for mounts where bracket mounting holes must be vertical, move bracket to the rear mounting position. The horn can be mounted in a variety of horizontal and vertical configurations by using adjustments of the swivel connections (bracket to horn). Figure 2. FC100 Directivity Factor and Directivity Index vs. Frequency USA Canada Switzerland Germany France Australia Hong Kong Japan Singapore Mexico UK Africa, Mid-East Latin America 12000 Portland Ave South, Burnsville, MN 55337, Phone: 952-884-4051, FAX: 952-884-0043 705 Progress Avenue, Unit 46, Scarborough, Ontario, Canada, M1H2X1, Phone: 416-431-4975, 800-881-1685, FAX: 416-431-4588 Keltenstrasse 11, CH-2563 IPSACH, Switzerland, Phone: 41/32-331-6833. FAX: 41/32-331-1221 Hirschberger Ring 45, D94315, Straubing, Germany, Phone: 49 9421-706 392, FAX: 49 9421-706 287 Parc de Courcerin, Alle Lech Walesa, Lognes, 77185 Marne La Vallee, France, Phone: 33/1-6480-0090, FAX: 33/1-6480-4538 Unit 23, Block C, Slough Business Park, Slough Avenue, Silverwater, N. S. W. 2128, Australia, Phone: 61/2-9648-3455, FAX: 61/2-9648-5585 Unit E & F, 21/F, Luk Hop Industrial Bldg. , 8 Luk Hop St. , San PO Kong, Kowloon, Hong Kong, Phone: 852-2351-3628, FAX: 852-2351-3329 2-5-60 Izumi, Suginami-ku, Tokyo, Japan 168, Phone: 81-3-3325-7900, FAX:81-3-3325-7789 3015A Ubi Rd 1, 05-10, Kampong Ubi Industrial Estate, Singapore 408705, Phone: 65-746-8760, FAX: 65-746-1206 Av. [. . . ] FAX: 41/32-331-1221 Hirschberger Ring 45, D94315, Straubing, Germany, Phone: 49 9421-706 392, FAX: 49 9421-706 287 Parc de Courcerin, Alle Lech Walesa, Lognes, 77185 Marne La Vallee, France, Phone: 33/1-6480-0090, FAX: 33/1-6480-4538 Unit 23, Block C, Slough Business Park, Slough Avenue, Silverwater, N. S. W. 2128, Australia, Phone: 61/2-9648-3455, FAX: 61/2-9648-5585 Unit E & F, 21/F, Luk Hop Industrial Bldg. , 8 Luk Hop St. , San PO Kong, Kowloon, Hong Kong, Phone: 852-2351-3628, FAX: 852-2351-3329 2-5-60 Izumi, Suginami-ku, Tokyo, Japan 168, Phone: 81-3-3325-7900, FAX:81-3-3325-7789 3015A Ubi Rd 1, 05-10, Kampong Ubi Industrial Estate, Singapore 408705, Phone: 65-746-8760, FAX: 65-746-1206 Av. 53390, Phone: (52) 5358-5434, FAX: (52) 5358-5588 4, The Willows Centre, Willow Lane, Mitcham, Surrey CR4 4NX, UK, Phone: 44 181 640 9600, FAX: 44 181 646 7084 12000 Portland Ave South, Burnsville, MN 55337, Phone: 952-887-7424, FAX: 952-887-9212 12000 Portland Ave South, Burnsville, MN 55337, Phone: 952-887-7491, FAX: 952-887-9212 www. electrovoice. com · Telex Communications, Inc. [. . . ]