vanced theoretical concepts and offer the audio engineer

JBL radial horns are carefully designed according to ad- vanced theoretical concepts and offer the audio engineer significant advantages In many sound...

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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