User manual ALTEC LANSING 15560A TRANSFORMERS

[. . . ] Altec's high efficiency Duplex® design delivers maximum output with minimum amplifier power. At a broadband efficiency rating of 97 dB SPL (1W/1m), the SLC308-8T has rated peak output of 109 dB SPL using the 8 watt transformer tap at a distance of one meter. Less efficient ceiling speaker systems require 30W to 60W transformer taps to generate similar output. The high efficiency design of the SLC308-8T allows the systems integrator to downsize the amplifier channel assigned to each zone of ceiling speakers by a factor of two-thirds or more. [. . . ] Using the SLC308-8T is the most profitable choice a sound contractor can make. The CD308-8T is installed in a round, metal, dampened 0. 25 cubic foot enclosure with metal strain relief strap. Three metal dogleg arms are screwed-down to secure the enclosure to the included metal tile bridge. An off-white one-piece metal décor grille snaps into the assembly. (3. 86 kg), one speaker system with grille SHIPPING WEIGHT Depth: Length/Width: 31. 7 lbs. (14. 38 kg), (includes 2 speaker systems with grilles and tile bridges) CD308-8A ­ THEILE-SMALL PARAMETERS Free Air Resonance, S: Equivalent Volume Compliance, VAS: Total Q, QTS: Electrical Q, QES: Mechanical Q, QMS: D. C. Resistance, RE: Peak Linear Displacement, Xmax: Reference Efficiency, o: Phone: 405. 848. 3108 Fax: 405. 848. 3217 92. 2 Hz 0. 84 ft. 3 (23. 7 l) 0. 87 1. 05 5. 26 8. 0 ohms 0. 05 in. Wilshire Blvd. , Suite 362 Oklahoma City, Oklahoma 73116 www. altecpro. com INSTALLATION AND WIRING Although the SLC308-8T can be mounted into a sheetrock or plaster ceiling, the following installation procedure is intended for suspended tile ceilings. Note: We recommend that you order the mounting ring (SLC-RING), not included, when installing the SLC308-8T into a sheetrock or plaster ceiling. The loudspeaker system shall include a 5-position switch for adjustable load/output requirements. The switch shall terminate the two 18 gauge input wires directly to the nominal 8 ohm impedance of loudspeaker component, or indirectly to the loudspeaker component through a step-down, multi-tap 8W transformer. The loudspeaker component, switch and transformer shall be assembled into a moisture resistant black-painted steel enclosure with internal damping material. (324 mm) diameter, one-piece, snap-on, off-white-painted steel grille; and a 23. 75 in. The loudspeaker system shall be the Altec Lansing Professional model SLC308-8T. Frequency Response 110 100 dB SPL (ref: 20 Pa) 90 80 70 SPECIFICATION NOTES 1 60 20 50 100 200 500 1k 2k 5k 10 k 20 k Frequency (Hz) 2 3 4 5 6 7 The frequency response of the loudspeaker system is measured at a distance of no less than 3 meters to obtain full range data. The level is then corrected to be equivalent to a 2. 83 V 1 m measurement. A near field measurement of the 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. The limits of the frequency response are referenced to -5 dB of the loudspeaker's rated sensitivity in the SLC's 0. 25 ft. 3 sealed enclosure. [. . . ] The limits of the frequency response are referenced to -5 dB of the loudspeaker's rated sensitivity in the SLC's 0. 25 ft. 3 sealed enclosure. 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. The power handling capacity of the loudspeaker system is tested using a full range form of AES Standard 2-1984. [. . . ]