JBL radial horns are carefully vanced theoretical significant sound
concepts
advantages
reproduction
designed
according
and offer the audio engineer
In many sound applications
reinforcement
The most Important
these are natural tonal quallty, a controlled dlstrlbution uniform
through
frequency
the full frequency response
within the rated coverage
to ad-
of
pattern of sound
range of the horn, ant
charactenstlcs
angle
and
at any point
Radial Horn Family In JBL radral horns, the wavefront a srngle, unobstructed trnultles to introduce tonal coloration
Model 2340
expands
through
path There are no drvrders or discon Irregulantres
In response
and consequent
All models are cast from aluminum,
thick wall sections to prevent flexing large aluminum damping
smoothly
with
Extenor surfaces of the
horns are coated with a heavy layer of special
material to further guard against unwanted
coloration
or ringing Because the side walls of JBL radial horns are perfectly
Model 2340 IS a special modification
straight, the horizontal
figuration
distribution
fined edges at all frequencies
pattern has sharply de-
within the normal
range of the device. In the vertical somewhat frequency
plane, the beam has a
“softer” edge, becoming
frequencies.
less directional
As a result of JBL’s exclusive response
rated dispersion
operating
is remarkably
at lower
throat design,
uniform
throughout
the
pattern, even at very high frequencies.
of the radial horn con-
In which the horn throat includes
bend, thus allowrng the horn-driver shallow spaces
A unique cross-section
the 90° bend maintains
full horizontal
In comparison
with multicell
horizontal
response
designs, JBL radial horns offer and a more sharply defined
pattern with complete
freedom
from high fre-
coverage
highest audible frequencies
Model 2340 has a rated pattern for use In systems
1200 Hz crossover
frequency
to be mounted
flanges as part of the heavy aluminum
casting
to a baffle board, and
The 2340 will mount to any JBL driver having a
(2 kHz octave band)
Sensitivity
IS
108 dB Nominal
but wrth much tighter pattern control Except for the right-angle plane and an attendant
Model 2340, all JBL radial horns
stacking
increase
in the vertical For example,
four 2350 horns in a vertical array reduces the
effective vertical coverage sensitivity
in sensitivity.
from 40” to 15” and boosts
several dB as compared
with a single horn-driver.
Heiaht
Width
Death
Shipping Weiaht
206 mm 18% in)
213 mm (8% InI
213 mm (8% in1
(5 lb1
2345
171 mm (6% in)
568 mm 122% in)
391 mm (15% in)
9 kg (20 lb)
2350
203 mm (8 in)
803 mm (31% in)
508 mm (20 in)
15 kg (33 lb)
2355
203 mm (8 in)
613 mm (24% in1
508 mm (20 in)
12 kg (26 lb)
Model 2340
may
below 1000 Hz )
includes flush-mount
the effortless,
can be stacked to obtain greater directionality
having a
(An 800 Hz crossover
The horn IS intended
quency “fingerrng” In general, these radial horns produce combrnatrons,
through
even at
of 60” x 80” and IS Intended
25 mm (1 In) throat
natural quality of JBL horn-lens
to be used In
development
be used wrth some loss of pattern control
audibly smoother
a right-angle
assembly
2 3 kg
NOTE The serwt~wty quoted for each horn is the SPL measured on-axis a! 1 m (3 3 feet) with a 1 W input signal (4 V into 16 ohms) warbled from the lowest recommended crossover frequency to 2500 Hz, with any JBL dwer
Above curves taken with 2410 compresslon driver
Q =5
Model 2350
Model 2345
‘I’_
,’
,,’
.,
” ‘.
:
,_“,
,,’
,,
‘,,
:
,’
Model 2345 IS a compact
radial horn having a rated pattern
Model 2350
IS
a large, professlonal
quality radial horn having
of 40” x90” It WIII mount drrectly to any JBL compressron
a 220 Hz taper cutoff and carefully
controlled
driver having a 25 mm (1 In) throat and IS Intended for use In
tern rated at 40° x 90” The horn
Intended
systems crossing
tems crossing
especially applications
over at 800 Hz or higher
recommended or portable
horns are not practical
for short-throw loudspeaker Sensitivity
Model 2345
IS
reinforcement
systems, where larger
IS 111 dB Nomlnal
Q= 6 3
IS
drivers
only systems having surtable low frequency IS
pat-
over at 500 Hz or higher, or may be used by
itself with one or two phenolrc-diaphragm srtivity
coverage
for use In sys-
111 dB Nominal
In speech-
rolloff
Sen-
Q= 6 3 (2 kHz octave band)
(2 kHz octave band) The 2350 requires to couple
the use of a Model 2328 throat adaptor
to a single 50 mm (2 in) throat driver, or a Model
2329 throat adaptor
for use with twodrivers.
one or two JBL drivers
having 25 mm (1 in) throats.
IS
a highly versatile
wide variety of applications
horn which can be used In a
rangrng from high-power
door paging systems to low-dIstortron installations
of the highest quality
Above curves taken with 2441 comlsression
out-
muslcal reinforcement
Vertical Dispersion
driver
Model
can be used to couple the 2350 to
The 2350
Above curves taken with 2410 compresslon
Additional
2327 throat extensions
driver
Model 2355
The general
performance
specifications
and application
notes for Model 2355 are exactly the same as those for Model 2350, except that rated coverage Sensitivity
is 114 dB. Nominal
Above curves taken with 2441 compressIon
ia:
Professional
James B Lansing 8500 Balboa
Sound,
Boulevard.
is 40° x 60~
Q= 12.6 (2 kHz octave band)
,
driver
Division
Inc
NorthrIdge,
Callfornla
‘JBL/hartnan
91329 U S A
lnternatlonal
