Jbl 2380 a brochure

Page 1

PROFESSIONAL SERIES

2389A

FEATURES:

Uniform horizontal on and off axis frequency
response

Precise horizontal and vertical pattern control
Full horn loading to 500 Hz

Flat front and compact size

Lightweight construction

4) mm (2 in) throat entry

~FRONT
BI~RADIAL HORN

The JBL Z380A BiiRadialTM horn is designed for
flush cabinet mounting or compact cluster applica7
tions. The 2380A has a nominal coverage pattern of
90° horizontal X 40° vertical. The horn provides uni,
form on and off axis frequency response from 500 Hz
to beyond 16 kHz in the horizontal plane and 2 kHz
to 16 kHz in the vertical plane with constant direcr
tivity above 2 kHz. The horns small vertical mouth
dimension (just slightly larger than the compres7
sion driver used to drive the horn) allows very
compact single and multiple horn/driver systems
to be put together Should vertical pattern control
he required below 2 kHz, two or more horns may
be stacked vertically to restore full BiiRadialTM
performance.

Page 2

The exceptionally consistent horizontal disper7
sion eliminates the midrange narrowing and high

frequency beaming problems typically associated
with conventional horn designs. Additionally, the
highly predictable performance of the 2380A
greatly simplifies cluster design. The need for
horn overlapping is minimized and lobing and
comb filter effects are virtually eliminated.

Computernaided design techniques were used

to derive the

horn contours

in the horizontal and

vertical planes. Utilizing sidewall contours based
on a polynomial power series formula, the horn
design yields smooth response, low distortion, and

SPECIFICATIONS:

even coverage. This design avoids the perforn
mance disadvantages of horns that feature sharp
flare transitions and flat sidewalls. The BiiRadialTM
compound flare configuration provides constant
coverage over defined, solid angles. To ensure light
Weight, superior strength, and freedom from resonn
ances, the horn bell is constructed of molded
structural foam.

The 2380A will accept the 49 mm (2 in) diameter
throat 2441, 2445, or 2485 compression driver \With
the addition of the 2327 adapter, the horn will

also accept the 25 mm (1 in) throat 2425 driver

us Patent No 4,302,932 Foreign pain-us pending

Throw: Short

Horizontal Coverage

Angle Degrees (Va .113);
Average Range:

Vertical Coverage

100 (+23, .23)
500 Hz 7 16 kHz

Angle Degrees (76 .13):
Average Range:

Dlrccuvity Factor (Q):
Directivity Index (1).):
Average Range:

115.131.» LowrFrcquency Limll:

Minimum Recommended
Crossover Frequency:

Axml Pressure Sensitivity.

445 117.5]
* Fm "may

40(+11,711)

2 kHz 716 14-12
10.7 (+1.3, .2 51
10,3 .113 (+1.0, .11.)
1 kHz 716 kHz
400 Hz

500 Hz
liZdBSILlW@1m

~- 279 111.0)
' r-zas [9.25]
L

1 4

T.

12.7 [0.50]

236 [9.2a]

m2

l «21 .751 ,
DIA

7.1 (0.23) DIA 4 FL.
on 101.5 moo) DIA

cum.
0 o n of 7 9
o 0 (CD . 0
° 12: [5.0917119
-o- for -or

--< 122 [4.311 L111: WWI-H
YVP TYP

Conscmcuon Molded structural foam (nominal 10 mm (0.38 in)

wall diickncssl

Overall Dimensions,
Mouth Height,

Mouth Width:

Length:

Mominng Dimensions
Rear Height:

279 mm [11 .n[
445 mm [17.5 .n[
230 mm [9.28 .n]

235 mm [9.25 .n[

Rm Width: 400 mm [15.75 .n[
Baffle (Jurout Required (Front mounung only)
Height: 238 mm [95".n1
mad. 403 mm [15mm]

Net ngnc
Shipping \Xcight:

2 2 kg [6 11.]
41. kg [10 11.]

Measured .... axis .n 11.: in. new mu. 1 wm mpm (4o .01.. ms 1:. ohms) and
on... m 1 meter distance using .1 inverse sq... law 1......1 sound

pressures (SPL re 20 nm) represent an average from 1 kHz m 4 kHz using 21..
2441 or 2445 .1...

Beamwidth vs Frequency

8 s 223332

a

n o) (4. a .5 m m m
mencym
Directivity vs Frequency

5...... x.