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Surround
Use this mode for films recorded
using Dolby Digital or Dolby Pro
Logic Surround.

Phantom
This mode creates surround
sound from stereo recordings.
The center channel is not used
and the surround channels have
a 20-ms delay.

3-Stereo Mode
Use this mode to play back Pro
Logic-encoded films when you
do not want the surround
channels to play.

Stereo
This mode plays a recording in
traditional two-channel stereo.

The Test Tone is used to
calibrate the volume settings of
each of the speakers in the
ESC340. It is dependent on the
room where the system is set up
and the relative distances and
positions of each speaker to the
listening position. In all modes,
a static-like noise will be heard
cycling, in order: left front,
center, right front, right
surround, left surround,
subwoofer. In modes other than
Dolby Digital, the sound from
the two surrounds will be
coming at the same time, since
the surrounds in all available
modes, except in Dolby Digital,
are in mono. When the Test
Tone is heard coming from a
specific channel, pressing the
Adjustment +/– (11) buttons
will increase or decrease the
level of sound coming from that
channel. The display status-bar
indicator (27) provides visual

indication of the adjustment as
the adjustment is being made.
The default adjustment level of 
0 dB is indicated by five status-
bar indicators illuminated. 

If adjustments are done in a
mode where a certain channel is
not available, the adjustment
step for that channel is skipped.
For example, in Phantom mode,
the center-channel level cannot
be adjusted since Phantom does
not have a center channel. In
stereo, neither the center nor
the surround levels can be 
adjusted since Stereo does not
feature surround speakers or a
center speaker.

Using the remote control,
adjust each channel’s levels
until the volume of all the
speakers is the same during the
test. To make sure all channels
are properly adjusted, do the

test twice, once in Dolby Digital
or DTS (Dolby Digital or DTS is
automatically selected when the
ESC340 is connected to a DVD
player playing Dolby Digital-
encoded or DTS-encoded
material) and once again in
Dolby Pro Logic.

Note: The Test Tone is used to
calibrate the system to
reproduce all program materials
at the correct relative levels, as
was determined by the re-
cording engineers. When
listening to actual surround-
encoded program material, the
volume level of the surround
channels is generally lower than
that of the front channels. In
fact, virtually all of the dialogue
and a substantial number of the
effects in a movie are re-
produced through the center
channel.

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• Make sure the subwoofer is

plugged into an active AC
wall outlet.

• Make sure the Master Power

Switch, located on the rear of
the subwoofer, is in the
On/Standby position.

• Make sure there is a source –

for example, a DVD Player, CD
Player, VCR or television –
hooked up to one of the four
input jacks.

• Make sure that the program

material is playing.

• Recheck the hookup

connections, referring to the
Speaker Connections section.

• Check all connections

between processor/amplifier
and each of the speakers.

• Raise the surround volume

from the remote control (see
Operation section).

• Make sure the TV show or

movie you are watching is
recorded in surround, try the
Phantom or Simulated
Surround mode.

• Increase the surround-

speakers’ level, using the
level-adjustment instructions
found earlier in this manual. 

• Make sure that the processor

is in the Surround or 
3-Stereo mode. If it is in
Phantom or Stereo mode, the
center speaker will not play.

• Increase the level of the

center channel, using the
level-adjustment instructions
earlier in this manual.

• Check the connections

between the subwoofer and
the center speaker.

• Experiment with placement

of the subwoofer. Remember,
place the subwoofer in a 
corner to get maximum bass
output from the system.

• Increase the subwoofer level,

using the level-adjustment
instructions found earlier in
this manual.

• Increase the level of bass,

using the remote control.

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Power Output
Satellites:
35 Watts x 5 @ 0.1% THD
Subwoofer:
100 Watts x 1 @ 1% THD

Signal-to-Noise Ratio
80 dBA

Input Impedance
(analog inputs) 
20k Ohms

Input Sensitivity
(analog inputs) 
400mV

Auto Turn-On Sensitivity
(analog inputs) 
2mV

Frequency Response (–6 dB)
35Hz – 20kHz

Dimensions (H x W x D) 
Satellites (each):
111 x 81 x 92mm
Subwoofer:
384 x 330 x 368mm

Occasional refinements may 
be made to existing products
without notice, but will always
meet or exceed original
specifications unless otherwise
stated.

JBL Consumer Products 
250 Crossways Park Drive, Woodbur y, NY 11797
8500 Balboa Boulevard, Nor thridge, CA 91329 
1-800-336-4JBL (4525) (USA only)
International: 2, route de Tours, 72500 Château-du-Loir, France
www.jbl.com

© 2000 JBL, Incorporated. JBL and Simply Cinema are 
registered trademarks of JBL, Incorporated. 
*Trademarks of Dolby Laboratories.

Part No. ESC340 OM

CAUTION:

 

TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE 

COVER (OR BACK). NO USER-SERVICEABLE PARTS INSIDE. REFER 

SERVICING TO QUALIFIED SERVICE PERSONNEL.

WARNING:

 

TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, 

DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE.

To disconnect the plug from the AC outlet, pull on the plug itself,
not on the cord. Pulling the cord may break the wire.

  Disconnect the plug from the AC outlet whenever the unit is to be

left unused for an extended period of time.

  Do not place furniture or other heavy objects on the cord, and

avoid dropping heavy objects on it. Also, do not make a knot 
in the cord; this can damage it and cause a fire hazard.

The lightning flash with arrowhead 
symbol, within an equalateral triangle, 
is intended to alert the user to the 

presence of uninsulated “dangerous voltage” 
within the product’s enclosure that may be of 
sufficient magnitude to constitute a risk of 
electric shock to persons.

The exclamation point within an 
equilateral triangle is intended to 
alert the user to the presence of 

important operating and maintenance 
(servicing) instructions in the literature 
accompanying the appliance.

C A U T I O N