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8340

High Power Cinema Surround
Speaker for Digital Applications

Professional Series

Key Features:

Approved by Lucasfilm, Ltd. for

T H X

® 

installations

D Crossover switchable between

ISO2969 cinema surround rolloff

and flat response

Uniform horizontal and vertical

coverage

Frequency range: 45 H

- 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 = “ + ”

L O W   F R E Q U E N C Y   L O U D S P E A K E R :

exceed the original design specifications unless otherwise stated

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