JBL 8340 User Manual
Professional Series
Key Features:
Frequency range: 45 HZ - 18 kHz
High Sensitivity: 96 dB (1 W, 1 m)
High Power Handling Capability:
150 watts pink noise
Similar size enclosure to the
successful 8330, allowing simple
installation into existing systems
In-cabinet mounting hardware
accepts JBL 2502 wall brackets
for fast installation
D Crossover switchable between
ISO2969 cinema surround rolloff
and flat response
Uniform horizontal and vertical
coverage
Approved by Lucasfilm, Ltd. for
THX® installations
The 8340 Cinema Surround
Speaker offers high power handling
capability, high sensitivity and
extended bass response in an
extremely compact enclosure. The
two-way 8340 incorporates the
proven reliability and performance
features found in the industry standard JBL 8330 Surround Loudspeaker
System and is designed to accurately
reproduce the extended dynamic
range and frequency response characteristics required by digital sound
formats.
The 8340 incorporates a highpower, long-throw 250 mm (10 in)
low frequency transducer which
extends the frequency response to
below 50 Hz. The low frequency
driver features an SFG™ (Symmetrical
Field Geometry) magnet structure
which lowers second harmonic distortion to inconsequential levels. The
high frequency section incorporates
a 19 mm (¾ in) compression driver/
horn combination capable of very
high output power. The true constant
directivity coverage (100° horizontal
by 60° vertical), combines with a very
smooth off-axis design in the crossover range to provide the same sound
character to all seats.
High Power Cinema Surround
8340
Speaker for Digital Applications
Specifications:
SYSTEM:
Frequency Range (— 10 dB): 45 Hz - 18 kHz
Power Rating¹: 150 watts continuous pink noise
Sensitivity²:
Nominal Impedance:
Crossover Frequency:
Downward Firing Angle:
High Frequency Contour Switch:
LOW FREQUENCY LOUDSPEAKER:
Nominal Diameter: 280 mm (10 in)
Voice Coil Diameter:
HF DRIVER/HORN:
Nominal Diameter: 19 mm (¾ in)
Voice Coil Diameter: 25 mm (1 in)
Input Terminations:
System Net Weight:
¹ Raring based on test signal of IEC filtered random noise with a peak-to-average ratio of 6 dB, two hours dnration.
² Sensitivity is based on a swept 500 Hz to 2.5 kHz signal for an input of 2.83 V @ 8 ohms
JBL continually engages in research related to product improvement. New marerials. production methods, and design
refinements 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 specifications unless otherwise stated
Polarity:
Characteristics:
Coverage Pattern: 100° H x 60° V
GENERAL:
Finish: Black vinyl
Grille Color:
Dimensions:
H x W x D
96 dB, 1 watt (2.83 V) at 1 meter (3.3 ft)
8 ohms
2kHz
Nominal 15° when mounted flush on back panel
2 positions: Flat and IS02969 Curve X surround contour
EIA, red = “ + ”
50 mm (2 in)
Ferro-fluid cooled
Dark gray
Dual five-way binding posts
539 mm x 481 mm x 304 mm
21¼ in x 19 in x 12 in
50 Ibs.
8340 High Power Cinema Surround Speaker for Digital Applications
Very high power handling (150 watts continuous, with
peaks of 600 watts) gives the 8340 the extended dynamic
range required by digital soundtracks. This power headroom also provides additional reliability.
The 8340 incorporates a true IS02969 cinema surround
rolloff curve, which is switchable to flat response for
installations where the speaker is mounted behind any
material or curtaining which can block high frequencies.
The same width and style cabinet as the 8330 allows
installation into existing systems. In-cabinet mounting
hardware accepts Omnimount® or wall brackets for fast
installation. Built to traditional JBL standards of precision,
the 8340 will continue to deliver exceptional performance
year after year, without special care or attention.
JBL Professional
8500 Balboa Boulevard, PO. Box 2200
Northridge, California 91329 U.S.A.
A Harman international Company
SS8340
CRP 5M
6/96
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