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Use this installation method for
Dolby Pro Logic applications
(not Dolby Digital, DTS

®

or

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.
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.

+      –

+      –

+      –

+      –

+      –

+        –

+      –

+      –

+      –

+      –

+      –

+      –

Use this installation method for
Dolby Pro Logic appli-cations
(not Dolby Digital, DTS

®

or

other digital processing), where
the receiver/processor is
equipped with a subwoofer

output, or a volume-controlled
preamp (line-) level output:
Use RCA-type patch cords 
to connect the line-level
subwoofer outputs on your
receiver or amplifier to the line-

level inputs on the subwoofer.
IMPORTANT: Do not use the
LFE input on the subwoofer
with Dolby Pro Logic
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-
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.

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 

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.

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
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 ¡ to the "OFF"
position.

200 Watts

IMPORTANT: CONNECT STRIPED WIRE  TO RED (    ) SPEAKER TERMINAL.

+

°

°

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.

™

¢

¡

£

The Phase Control ™ determines
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
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
experiment with the phase
switch in both positions, and
leave it in the position that
optimizes bass performance for
your taste.

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
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 there is no sound coming
from one speaker:
• 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 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.

• 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 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 more than one pair of main

speakers is being used, check
the minimum impedance
requirements of your
receiver/amplifier.

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.

• 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.

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.

• In Dolby Digital or DTS

®

modes, make sure your
receiver/processor is
configured so that the
surround speakers are
enabled.

• 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.