+ 0 + Y 0 M
O W N E R ’ S G U I D E
PRODUCT LINE:
®
MODEL
NUMBER:
SCS 178 and SCS 188 (230V)
DESIGN GOAL: Bring the thrill of live performance and movie sound to the
home environment by calling on JBL’s professional engineering leadership.
SATELLITE TYPE:Titanium-laminate-dome tweeter, reflex-loaded enclosure
SUBWOOFER TYPE: Bass-reflex enclosure
PORT DESIGN: FreeFlow™ flared
PROFESSIONAL REFERENCE: Cinema Loudspeaker Series
S P E A K E R P L A C E M E N T
Front Speakers
Center Channel Speaker Subwoofer
0 – 0.6m (0 – 2 ft.)
Surround Speakers
150-180 cm
The front speakers should be
placed the same distance from
each other as they are from the
listening position. They should
be placed at about the same
height from the floor as the
listeners’ ears will be, or they
may be angled toward the
listeners.
The two surround speakers
should be placed slightly
behind the listening position
and, ideally, should face each
other and be at a level higher
than the listeners’ ears. If that
is not possible, they may be
placed on a wall behind the
listening position, facing for-
ward. The surround back
speaker (in SCS 188 only)
should be placed behind the
listening position, facing the
center speaker. The surround
speakers should not call
The low-frequency material
reproduced by the subwoofer is
mostly omnidirectional, and this
speaker may be placed in a
convenient location in the
room. However, the best
reproduction of bass will be
heard when the subwoofer is
placed in a corner along the
same wall as the front
speakers. Experiment with
subwoofer placement by
temporarily placing the
subwoofer in the listening
position and moving around the
room until the bass
The center channel speaker
should be placed slightly
behind the front left and right
speakers, and no more than
two feet above or below the
tweeters of the left and right
speakers. It is often convenient
attention to themselves.
Experiment with their
reproduction is best. Place the
subwoofer in that location.
to set the center speaker on top placement until you hear a
of the television set, as shown
in the drawing.
diffuse, ambient sound
accompanying the main
program material heard in the
front speakers.
3
M O U N T I N G O P T I O N S
Satellites and Surrounds
On shelves.
On the wall. Wall brackets
are included.
On optional stands.
Wall-Mounting
The customer is responsible for
proper selection and use of
mounting hardware, available
through hardware stores, to
properly and safely wall-mount
the speakers.
S P E A K E R C O N N E C T I O N S
Separate and strip the ends of
the speaker wire as shown.
Speakers and electronics
phase” results in thin sound,
weak bass and a poor stereo
image.
Connection Tips
terminals have corresponding
(+) and (–) terminals. Most
manufacturers of speakers and
electronics, including JBL, use
red to denote the (+) terminal
and black for the (–) terminal.
With the advent of multichannel
surround-sound systems,
connecting all of the speakers
in your system with the correct
polarity remains equally
important in order to preserve
The (+) lead of the speaker wire the proper ambience and
is noted with a stripe. It is
important to connect all
directionality of the program
material.
speakers identically: (+) on the
speaker to (+) on the amplifier
and (–) on the speaker to (–) on
the amplifier. Wiring “out of
4
Dolby* Pro Logic* (Non-Digital) – Speaker Level (SCS 178 only)
Use this installation method for
Dolby Pro Logic applications
(not Dolby Digital, DTS® or
Left Front
Right Front
Center
+
–
+
–
+
–
other digital processing),
where the receiver/processor
does not have a subwoofer
output, or a volume-controlled
preamp (line-) level output:
Connect your receiver or
amplifier’s front left and right
speaker terminals to the left
and right terminals on the
subwoofer that are marked
“High Level In.” Connect the
left and right terminals on the
subwoofer that are marked
“High Level Out” to the cor-
responding terminals on the
back of your front left and right
speakers.
Subwoofer
HIGH LEVEL
+
–
–
+
L
R
OUT
IN
Receiver
Left Front
Center
Right Front
Connect your receiver or
amplifier’s center, left and right
surround-speaker terminals to
the corresponding terminals on
the back of your center, left and
right surround speakers.
+
–
+
–
+
–
Left Surround
Surround Back
Right Surround
+
–
+
–
+
–
Left Surround
Surround Back
Right Surround
+
–
+
–
+
–
Only in 6.1 systems
5
Dolby Pro Logic (Non-Digital) – Line Level (SCS 178 and SCS 188)
Use this installation method for
Dolby Pro Logic appli-cations
(not Dolby Digital, DTS® or
output, or a volume-controlled
preamp (line-) level output:
Use RCA-type patch cords
level inputs on the subwoofer.
IMPORTANT: Do not use the
LFE input on the subwoofer
with Dolby Pro Logic
other digital processing), where to connect the line-level
the receiver/processor is
equipped with a subwoofer
subwoofer outputs on your
receiver or amplifier to the line-
processors. Note: If your
receiver or amplifier only has
one subwoofer output jack,
then you will need to use a Y-
connector (not included). Plug
the male end of the Y-
Center
Left Front
Right Front
+
–
+
–
+
–
connector into your receiver or
amplifier’s subwoofer output
jack, and connect each of the
two female ends to separate
RCA-type patch cords. Finally,
plug the RCA-type patch cords
into the line-level inputs on the
subwoofer.
Connect each speaker to the
corresponding speaker
terminals on your receiver or
amplifier.
Subwoofer
Line-
Level In
L
R
Receiver
Left
Front
Subwoofer
Out
Right
Front
+
+
–
–
R
L
+
–
Center
Surround Back
Left
Surround
Right
Surround
+
–
+
–
+
–
Right Surround
Left Surround
Surround Back
+
–
+
–
+
–
Only in 6.1 systems
Dolby Digital or DTS® (or Other Digital Surround Mode) Connection
(SCS 178 and SCS 188)
RECEIVER
SUBWOOFER
LINE LEVEL IN
output or subwoofer output
on your receiver or amplifier.
Connect each speaker to the
corresponding speaker
terminals on your receiver or
amplifier.
Make sure that you have
configured your surround-
sound processor for
“Subwoofer On.” The surround
receiver should be configured
for 6.1-channel operation
(if available) and the front left,
front right, center and rear
speakers should all be set to
“Small.”
If your receiver allows you to
set the crossover frequency
between the subwoofer and the
main speakers, select either
120Hz or 150Hz, or select the
setting that is the closest
frequency below these.
L
LFE INPUT
LFE OUT
R
Use this installation method for
Dolby Digital, DTS® or other
digital surround processors:
Use the line-level input jack
marked “LFE” for the Low-
Frequency Effects channel.
Connect this jack to the LFE
6
O P E R AT I O N
P H A S E
determines
Press the Master Power Switch
(marked Power ¡) to the ON
position to use the subwoofer.
When your receiver or amplifier
is off, or is not sending program
material to the subwoofer, the
subwoofer will be in standby
mode. When the subwoofer
senses an audio signal, it will
automatically turn itself on. If
the subwoofer does not sense a
signal after approximately
twenty minutes, it will
The Phase Control
™
whether the subwoofer’s piston-
like action moves in and out in
phase with the main speakers or
opposite the main speakers. This
is adjusted by pressing the button
to the 0°, or 180° position. The 0°
position of the phase button plays
the bass signal in phase with the
main speakers. The 180° position
plays the bass signal 180º, or out
of phase with the main speakers.
Proper phase adjustment
automatically go into standby
mode. If you will be away from
home for an extended period of
time, or if the subwoofer will
not be used, switch the Master
Power switch
position.
¡
to the "OFF"
depends on several variables
such as subwoofer placement
and listener position. Adjust the
phase switch to optimize bass
output at the listening position.
Every system, room and listener
is different. There are no right or
wrong settings. This switch
offers the added flexibility to
adjust your subwoofer for
optimum performance for your
specific listening conditions
without having to move your
speakers. If at some time in the
future you happen to rearrange
your listening room, and move
your speakers, you should
¢
¡
£
™
HIGH LEVEL
LINE LEVEL IN
LFE
+
–
–
+
L
R
OUT
IN
L
PHASE
0°
180°
R
+
IMPORTANT: CONNECT STRIPED WIRE TO RED ( ) SPEAKER TERMINAL.
experiment with the phase
switch in both positions, and
leave it in the position that
AC 230V~50Hz
200 Watts
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
optimizes bass performance for
your taste.
Volume
Crossover
Volume can be adjusted using
the Subwoofer Volume Control
£, as shown.
The crossover filter between
the subwoofer and satellites
can be adjusted using the
Crossover Control ¢. The
optimum setting for the
SCS 178 and SCS 188 system is
with the Crossover Control
set to the "Min" position.
¢
Subwoofer
Level
Subwoofer
Level
MIN
MAX
MIN
MAX
7
T R O U B L E S H O O T I N G
If there is no sound from any of
the speakers:
• Check that receiver/amplifier
is on and a source is playing.
• Check that the powered
subwoofer is plugged in, its
• If your receiver/processor is
set in Dolby Pro Logic mode,
make sure the center speaker
is not in phantom mode.
• If your receiver/processor
is set in Dolby Digital or DTS®
mode, make sure the
receiver/processor is con-
figured so that the center
speaker is enabled.
If there is no sound from the
surround speakers:
• Check all wires and
connections between
receiver/ amplifier and
speakers. Make sure all wires
are connected. Make sure
none of the speaker wires are
frayed, cut or punctured.
• Review proper operation of
your receiver/amplifier and its
surround-sound features.
• Make sure the movie or TV
show you are watching is
recorded in a surround-sound
mode. If it is not, check to see
if your receiver/ amplifier has
other surround modes you
may use.
Power switch
¡
is switched
on to the “ON•” position.
• Check all wires and
connections between
receiver/ amplifier and
speakers. Make sure all wires
are connected. Make sure
none of the speaker wires are
frayed, cut or punctured.
• Review proper operation of
your receiver/amplifier.
If the system plays at low
volumes but shuts off as
volume is increased:
• Check all wires and connecti-
ons between receiver/
amplifier and speakers. Make
sure all wires are connected.
Make sure none of the
speaker wires are frayed, cut
or punctured.
If there is no sound coming
from one speaker:
• In Dolby Digital or DTS®
modes, make sure your
receiver/processor is
configured so that the
surround speakers are
• Check the “Balance” control
on your receiver/amplifier.
• Check all wires and con-
nections between receiver/
amplifier and speakers. Make
sure all wires are connected.
Make sure none of the
speaker wires are frayed, cut
or punctured.
• In Dolby Digital or DTS®
modes, make sure that the
receiver/processor is
configured so that the
speaker in question is
enabled.
• If more than one pair of main
speakers is being used, check
the minimum impedance
requirements of your
enabled.
receiver/amplifier.
• Review the operation of your
DVD player and the jacket of
your DVD to make sure that
the DVD features the desired
Dolby Digital or DTS® mode,
and that you have properly
selected that mode using both
the DVD player’s menu and
the DVD disc’s menu.
If there is low (or no) bass
output:
• Make sure the connections to
the left and right “Speaker
Inputs” have the correct
polarity (+ and –).
• Make sure the subwoofer is
plugged into an active
electrical outlet.
If there is no sound from the
center speaker:
• Check all wires and
connections between
receiver/
amplifier and speaker. Make
sure all wires are connected.
Make sure none of the
speaker wires are frayed, cut
or punctured.
• Make sure the powered
subwoofer is plugged in and
switched on.
• In Dolby Digital or DTS®
modes, make sure your
receiver/processor is
configured so that the
subwoofer and LFE output are
enabled.
8
Declaration of Conformity
We, Harman Consumer International
2, route de Tours
72500 Château-du-Loir
France
declare in own responsibility, that the product
described in this owner’s manual is in
compliance with technical standards:
EN 60065:1998
EN 55013/A14:1999
EN 55020/A14:1999
EN 61000-3-2/A14:2000
EN 61000-3-3/1.1995
EN 50081-1:1992
EN 50082-1:1992
Gary Mardell
JBL,
Harman Consumer International
France,09/03
9
S P E C I F I C AT I O N S
SCS 178/SCS 188 Satellite and Surround Back
Frequency Response (-6dB):
Sensitivity (2.83V/1m):
Nominal Impedance:
90Hz – 22kHz
86dB
4 Ohms
Recommended Amplifier Power
Drive Units:
25 – 100 Watts RMS per Channel
12mm Polyamide/Titanium Laminate Video-shielded HF
100mm Paper Cone Video-shielded Mid/Bass
235mm x 140mm x 179mm (9.3" x 5.5" x 7")
2.8kg (6.2lb)
Dimensions (H x W x D):
Weight:
SCS 178 and SCS 188 Center
Frequency Response (-6dB):
100Hz – 22kHz
Sensitivity (2.83V/1m):
Nominal Impedance:
Recommended Amplifier Power
Drive Units:
88dB
4 Ohms
25 – 100 Watts RMS per Channel
12mm Polyamide/Titanium Laminate Video-shielded HF
Dual 100mm Paper Cone Video-shielded Mid/Bass
145mm x 402mm x 155mm (5.7" x 15.8" x 6.1")
4.5kg (9.9lb)
Dimensions (H x W x D):
Weight:
SCS 178 Active Subwoofer
Low Frequency Cut-off:
35Hz
High Frequency Cut-off:
Built-in Power Amplifier:
Drive Unit:
Dimensions (H x W x D):
Weight:
40 Hz - 160Hz Variable
100 Watts RMS
200mm Paper Cone Long Throw Driver. Bass Reflex Enclosure
450mm x 250mm x 360mm (17.7" x 9.8" x 14.2")
13.6kg (30lb)
SCS 178 System
Frequency Response (-6dB):
35Hz – 20kHz
Refinements may be made on occasion to existing products without notice,
but will always meet or exceed original specifications unless otherwise stated.
Simply Cinema is a registered trademark of JBL, Incorporated.
* Dolby and Pro Logic are trademarks of Dolby Laboratories.
DTS® is a registered trademark of Digital Theater Systems, Inc.
O W N E R ’ S G U I D E
P R O S O U N D
PRODUCT LINE:
C O M E S H O M E ™
®
JBL Consumer Products
250 Crossways Park Drive, Woodbury, NY 11797
Europe: 2. Route de Tours, 72500 Château du Loir, France
MODEL
NUMBER:
SCS 178 and SCS 188
DESIGN GOAL: Bring the thrill of live performance and movie sound to the
home environment by calling on JBL’s professional engineering leadership.
SATELLITE TYPE:Titanium-laminate-dome tweeter, reflex-loaded enclosure
SUBWOOFER TYPE: Bass-reflex enclosure
©2001 JBL, Incorporated.
JBL is a registered trademark of JBL, Incorporated.
Part No.406-000-01570
PORT DESIGN: FreeFlow™ flared
PROFESSIONAL REFERENCE: Cinema Loudspeaker Series
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