Jbl 2402 h brochure

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c2202H Ultra-High Frequency Transducer The circular exponential horn assembly is die cast of solid aluminum. Internally, the annular diaphragm is pneumatically formed of fatigue-resistant aluminum alloy. Wire used in the 44 mm (1Iin) voice coil is aluminum, milled to a thin ribbon. This process places a maximum amount of conductor in the magnetic gap for optimum efÞciency and transient response. The use of high-temperature voice-coil former materials and adhesives has improved the power handling and rug- gedness of the drivers. Architectural SpeciÞcations: The transducer shall have a measured sensitivity (SPL at 1 m with a 1 W input swept from 5 kHz Ð 20 kHz) of at least 110 dB on axis. On- axis frequency response measured under free-Þeld conditions at a distance of 1.8 m (6 ft) or more shall extend from 3 kHz to 15 kHz, within plus or minus 3 dB. Dispersion shall be 40°conical at 10 kHz, when measured at 6 dB down points relative to on-axis frequency response charactistics using N-octave band pink noise as the signal source. Nominal impedance shall be 8 Vand the power capacity shall be at least 20 W when driven by pink noise, band-limited from 6 kHz to 20 kHz. The transducer shall have a maximum diameter of 121 mm (4Iin), a depth of 98 mm (3Min) and weigh not less than 2.3 kg (5 lb). The exponential horn shall be die cast of aluminum and the magne- tic circuit shall weigh not less than 1.9 kg (4Jlb). Voice coil diameter shall be 44 mm (1Iin) operating in a magnetic Þeld whose ßux density measures at least 1.75 T (17,500 gauss). Voice coil wire shall be milled aluminum ribbon. The transducer shall be JBL Model 2402H. JBL continually engages in research related to produce improvement. New materials, pro- duction methods, and design reÞnements are introduced into existing products without notice as a routine expression of that philosophy. For this reason, any current JBL product may differ in some respect from its published description, but will always equal or exceed the original design speciÞcations unless otherwise stated. JBL Professional 8500 Balboa Boulevard, P.O. Box 2200 Northridge, California 91329 U.S.A. A Harman International CompanySS 2402H CRP 5M 10/96 +5 0 –5 –10 –15 –20 Response in dB 1,000 Frequency in Hz 100,000 10,000 Beamwidth (–6 dB) Degrees 360 300 200 180 100 90 80 70 60 50 40 30 20 10 2 3 5 Frequency, kHz 10 20 –0 dB –10 dB –20 dB –30 dB 5 kHz 10 kHz 2.5 kHz 50° 60° 70° 80° 90° 50° 60° 70° 80° 90° 40° 30° 20° 10° 0° 10° 20° 30° 40° Beamwidth vs. Frequency Polar response of the 2402H in the horizontal plane, measured with N-octave band pink noise in a free-Þeld environment. The curves were traced by an automatic recorder. Power fed to the 2402H was adjusted to provide the same 0 dB reference for each curve. Frequency response of the 2402H, measure on axis.