User manual ALTEC LANSING 1783 SIGNAL PROCESSING

[. . . ] The paintable trapezoid cabinet is constructed from strong 13-ply birch plywood, with steel reinforced suspension points. Altec includes the suspension hardware kit with each speaker. Color choices are charcoal grey or white, with contrasting cloth covered metal grille. The DE94128A has an internal 1, 000 Hz passive network that can be easily switched over to bi-amp operation. [. . . ] Connectors are barrier strip or Neutrik® Speakon® connectors. Altec Lansing includes neutral grille cloth with each subwoofer, allowing you to dye the cloth to integrate the subwoofer into the surroundings. For extended low frequency performance, the LF215-4A is a dual 15" / 380mm flyable subwoofer that has the same trapezoid footprint as the DE9412-8A. Altec Lansing's model 4048A 4-in x 8-out DSP processor has available presets for a variety of design requirements. 8. 0 6. 6 at 140 Hz 8. 0 7. 3 at 290 Hz 8. 0 6. 5 at 3, 500 Hz 1, 000 Hz 0. 97% 0. 31% 1. 01% 2. 85% 0. 81% 2. 80% INPUT CONNECTIONS 2x 4 position barrier strip and 2x NL4 CONTROLS Lowpass On/Off and Highpass On/Off switches ENCLOSURE MATERIALS & FINISH 18 mm, 13 ply Birch Plywood Finished with Charcoal Grey or White Catalyzed Polyurethane SUSPENSION SYSTEM 9 Working Load Limit (maximum weight applied to uppermost mounting point): tbd lbs. (tbd kg) (12) 3/8 in. -16 Threaded Mounting Suspension Points (3 each top & bottom and 2 each sides & back) DIMENSIONS 27. 13 in. (W rear) 689 mm (H) x 613 mm (W) x 664 mm (D) x 257 mm (W rear) WEIGHT Net Shipping 97 lbs. Wilshire Blvd. , Suite 362 · Oklahoma City, Oklahoma 73116 · Phone: 1-405-848-3108 · Fax: 1-405-848-3217 · www. altecpro. com ARCHITECTS & ENGINEERS SPECIFICATION The loudspeaker system shall be a two-way multi-purpose type consisting of a 12 inch / 300mm Duplex® point-source loudspeaker component featuring a 12" / 300mm low frequency speaker combined in a single magnet structure with a large format 1. 4" exit throat high frequency compression driver mated to a 90° x 40° MantarayTM high frequency horn. 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 1, 000 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. 3 The sensitivity of the loudspeaker system is the log based average SPL taken over the intended bandwidth of operation for the system with a 2. 83 V swept sine stimulus. The data is measured and level corrected in a manner consistent with note 1. 4 The power handling capacity of the loudspeaker system is tested using a full range form of AES Standard 2-1984. The test stimulus is band limited (40 Hz ­ 16 kHz) pink noise with a 6 dB crest factor. The applied RMS voltage is determined using the minimum impedance of the system. The amplifier used to drive the system has a minimum operating headroom of 6 dB referenced to the RMS voltage. 5 The maximum output level of the loudspeaker system is calculated based on the sensitivity and the power handling capabilities of the system. 6 The coverage angles for the loudspeaker system are taken as the -6 dB points of the directivity response and averaged from 500 Hz ­ 16 kHz. 7 The minimum impedance of the loudspeaker system is taken over its intended band of operation. [. . . ] 6 The coverage angles for the loudspeaker system are taken as the -6 dB points of the directivity response and averaged from 500 Hz ­ 16 kHz. 7 The minimum impedance of the loudspeaker system is taken over its intended band of operation. 8 The distortion measurements of the loudspeaker system are performed at a distance of 1 m with RMS input voltages corresponding to 1% and 10% of rated system power handling calculated using minimum system impedance. The distortion percentages are log based averages from 300 Hz ­ 3 kHz. [. . . ]