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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.
