JBL 2386 Brochure
2386
Flat-Front
Bi-Radial Horn
Key Features:
䉴
40° x 20° nominal dispersion
䉴
Uniform horizontal on- and off-axis
frequency response
䉴
Precise horizontal and vertical
pattern control
䉴
Full horn loading to 400 Hz
䉴
Flat front, compact size
䉴
Lightweight construction
䉴
49 mm (2 in) throat entry
The JBL 2386 Flat-Front Bi-Radial
TM
horn1is designed for flush cabinet
mounting or compact cluster applications. The 2386 has a nominal cover-
age pattern of 40° horizontal by 20°
vertical. It provides uniform on-and
off-axis frequency response from
1 kHz to beyond 16 kHz in the horizontal plane and 2.5 kHz to 16 kHz
in the vertical plane, with constant
directivity above 2 kHz. The horn’s
small vertical mount dimension (just
slightly larger than the compression
driver used to drive the horn) allows
very compact single and multiple
horn/driver systems to be put together. Should vertical pattern control be
required below 2.5 kHz, two or more
horns may be stacked vertically to
restore full Bi-Radial performance.
The exceptionally consistent horizontal dispersion eliminates the
midrange narrowing and high frequency beaming problems typically
associated with conventional horn
designs. Additionally, the highly predictable performance of the 2386
greatly simplifies cluster design. The
need for horn overlapping is minimized and lobing and comb filter
effects are virtually eliminated.
Computer-aided 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
even coverage. This design avoids the performance disadvantages of horns
that feature sharp flare transitions and flat sidewalls. The Bi-RadialTMcompound flare configuration provides constant coverage over defined, solid
angles. To ensure lightweight, superior strength, and freedom from resonances, the horn bell is contructed of injection-molded, reinforced, solid
polyurethane.
The 2386 will accept the 49 mm (2 in) diameter throat 2441, 2445, or
2482 compression driver. With the addition of the 2327 adapter, the horn
will also accept the 25 mm (1 in) throat 2425 driver.
1
U.S. Patent No. 4,308,932. Foreign patents pending
Professional Series
䉴 2386 Flat-Front Bi-Radial Horn
Specifications:
Nominal Coverage: 40° Horizontal x 20° Vertical
Throw: Long
Horizontal Coverage:
Angle Degrees (–6 dB): 45 (+12 –14)
Average Range: 1 kHz-16 kHz
Vertical Coverage:
Angle Degrees (–6 dB): 25 (+11 –10)
Average Range: 2.5 kHz-16 kHz
Directivity Factor (Q): 44.9 (+38.2 –18.1)
Directivity Index (Di): 16.5 dB (+2.7 –2.2)
Average Range: 2 kHz-16 kHz
Throat Diameter: 49 mm (2 in)
Usable Low Frequency Limit: 350 Hz
Minimum Recommended
Crossover Frequency: 400 Hz
Axial Pressure Sensitivity: 116 dB SPL, 1W @ 1 m
Construction: Injection-molded reinforced
high-density solid polyurethane
[nominal 10 mm (0.38 in) wall
thickness]
Color: Black
Overall Dimensions:
Mouth Height: 279 mm (11 in)
Mouth Width: 445 mm (17.5 in)
Length: 359 mm (14-⁹⁄₆₄ in)
Mounting Dimensions:
Rear Height: 235 mm (9¼ in)
Rear Width: 400 mm (15⅞ in)
Baffle Cutout Required: (Front mounting only)
Height: 238 mm (9⅜ in)
Width: 403 mm (15⅞ in)
Net Weight: 5.5 kg (12 lb)
Shipping Weight: 7.3 kg (16 lb)
1
Measured on axis in the far field with 1 watt (4.0 VRMS, 16 ohms) input and referenced
to 1 meter distance using the inverse square law. Listed sound pressure represents an
average from 1 kHz to 4 kHz using the JBL Model 2441, 2445 or 2482 driver.
Beamwidth vs Frequency
Directivity vs Frequency
300
200
180
100
90
80
70
60
50
40
30
20
Beamwidth (-6 dB) Degrees
10
왕
쑗
왕
왕
쑗
쑗
2001005020
Frequency in Hz
100
Q
10
1
20 50 100 500
쑗
쑗
Frequency in Hz
쑗
쑗
왕
왕
쑗
왕
쑗
왕
쑗
쑗
쑗
쑗
쑗
쑗
왕
쑗
쑗
왕
왕
왕
Vert.
왕
왕
쑗
쑗
쑗
쑗
쑗
쑗
쑗
쑗
쑗
쑗
쑗
쑗
쑗
1000 5000 10000 20000
Hor.
쑗
쑗
쑗
쑗
쑗
왕
20
쑗
10
0
쑗
왕
왕
왕
왕
왕
2000010000500020001000500
D
I
dB
Loading...