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8340
High Power Cinema Surround
Speaker for Digital Applications
Professional Series
Key Features:
Approved by Lucasfilm, Ltd. for
THX
®
installations
D Crossover switchable between
ISO2969 cinema surround rolloff
and flat response
Uniform horizontal and vertical
coverage
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
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 stan-
dard JBL 8330 Surround Loudspeaker
System and is designed to accurately
reproduce the extended dynamic
range and frequency response charac-
teristics required by digital sound
formats.
The 8340 incorporates a high-
power, 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 distor-
tion 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 cross-
over range to provide the same sound
character to all seats.
Specifications:
SYSTEM:
Frequency Range (— 10 dB): 45 Hz - 18 kHz
Power Rating¹: 150 watts continuous pink noise
Sensitivity²:
96 dB, 1 watt (2.83 V) at 1 meter (3.3 ft)
Nominal Impedance:
8 ohms
Crossover Frequency:
2kHz
Downward Firing Angle:
Nominal 15° when mounted flush on back panel
High Frequency Contour Switch:
2 positions: Flat and IS02969 Curve X surround contour
Polarity:
Nominal Diameter: 280 mm (10 in)
Voice Coil Diameter:
50 mm (2 in)
HF DRIVER/HORN:
Nominal Diameter: 19 mm (¾ in)
Voice Coil Diameter: 25 mm (1 in)
Characteristics:
Ferro-fluid cooled
Coverage Pattern: 100° H x 60° V
GENERAL:
Finish: Black vinyl
Grille Color:
Dark gray
Input Terminations:
Dual five-way binding posts
Dimensions:
539 mm x 481 mm x 304 mm
H x W x D
21¼ in x 19 in x 12 in
System Net Weight:
50 Ibs.
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
EIA, red = “ + ”
LOW FREQUENCY LOUDSPEAKER:
exceed the original design specifications unless otherwise stated