User manual ALTEC LANSING DE6412-8A SPEAKER SYSTEM

[. . . ] The result of the proximity of the voice coils is a point-source alignment. Altec Lansing's use of this point-source Duplex®, or coaxial, design maximizes speech intelligibility by minimizing the interference from adjacent devices that so often occurs in traditional two-way speaker systems. [. . . ] The crossover network shall be a dual-section, 12 dB/octave slope low pass and 12 dB/octave slope high pass with an electro-acoustic crossover frequency of 950 Hz, switchable for bi-amp operation. The loudspeaker system shall have an operating bandwidth of 110 Hz - 15 kHz with a sensitivity of 102 dB when measured at a distance of one meter. The power handling capability shall be 400 W AES (1, 600 W peak). Nominal impedance shall be 8. 0 ohms with a minimum impedance of 6. 6 ohms at 140 Hz. The loudspeaker shall have nominal coverage angles of 60 degrees in the horizontal plane and 40 degrees in the vertical plane. The paintable cabinet shall be a Sealed Mid-Bass Horn, constructed of 18 mm Birch plywood painted grey or white with a cloth covered metal grille. The cabinet shall include integral suspension points. Forged shoulder machinery eye bolts shall be included to facilitate the suspension of the speaker system. The dimensions shall be 27. 13 inches (689 mm) high by 24. 13 inches (613 mm) wide by 26. 13 inches (664 mm) deep. The loudspeaker system shall weigh 114 pounds (51. 8 kg). DIMENSIONS SHOWN IN ( ) PARENTHESES ARE IN MILLIMETERS. The level is then corrected to be equivalent to a 2. 83 V 1 m measurement. A near field measurement of the loudspeaker system is performed for frequencies below 500 Hz. This data is then combined with the full range measurement to give an accurate composite frequency response curve. [. . . ] Maximum enclosure rigging angle is 45°. Use only the correct mating hardware, forged shoulder machinery eye bolt, Mil Spec MIL 51937-3. [. . . ]