DOWNLOAD JBL SCS 138 Sub (serv.man11) Service Manual ↓ Size: 160.07 KB | Pages: 12 in PDF or view online for FREE

Model
SCS 138 Sub (serv.man11)
Pages
12
Size
160.07 KB
Type
PDF
Document
User Manual / Operation Manual
Brand
Device
Audio
File
scs-138-sub-sm11.pdf
Date

JBL SCS 138 Sub (serv.man11) User Manual / Operation Manual ▷ View online

4
1.52 – 1.83m
(5 – 6 ft.)
0 – 0.61m (0 – 2 ft.)
Subwoofer
Surround Speakers
Front Speakers
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 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 to set the center
speaker on top of the televisi-
on set, as shown in the
drawing. Use the supplied
support leg to aim it toward the
listener by screwing the leg in
to angle the speaker up, or
unscrewing the leg slightly to
angle the speaker down.
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 speakers
should not call attention to
themselves. Experiment with
their placement until you hear
a diffuse, ambient sound
accompanying the main-
program material heard in the
front speakers.
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
reproduction is best. Place the
subwoofer in that location.
Center-Channel
Speaker
S P E A K E R   P L A C E M E N T
5
M O U N T I N G   O P T I O N S
Satellites and Surrounds
On shelves.
Wall-Mounting
Attach plate to wall. The
brackets should be placed,
if possible, so that the
screws will fasten into a
wooden wall stud. If that is
not possible, use properly
selected wall anchors.
The customer is respon-
sible for proper selection
and use of mounting
hardware, available
through hardware stores,
to properly and safely wall-
mount the speakers.
On the wall. Wall brackets
are included.
Slide speaker onto support.
On optional stands
(FS300S).
Place speaker and support
on wall plate.
6
Separate and strip the ends
of the speaker wire as
shown. Speakers and elec-
tronics terminals have
corresponding (+) and (–)
terminals. Most manu-
facturers of speakers and
electronics, including JBL,
use red to denote the (+)
terminal and black for the (–)
terminal.
The (+) lead of the speaker
wire is noted with a stripe. It
is important to connect both
speakers identically: (+) on
the speaker to (+) on the
amplifier and (–) on the
speaker to (–) on the ampli-
fier. Wiring “out of phase”
results in thin sound, weak
bass and a poor stereo
image.
With the advent of multi-
channel surround-sound
systems, connecting all of the
speakers in your system with
the correct polarity remains
equally important in order to
preserve the proper
ambience and directionality
of the program material.
S P E A K E R   C O N N E C T I O N S
Connection Tips
7
Dolby* Pro Logic* (Non-Digital) – Speaker Level
Use this installation method for
Dolby Pro Logic appli-cations
(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 corre-sponding terminals
on the back of your center, left
and right surround speakers.
Right Front
Right Surround
Left Front
Left Surround
Center
+      –
+      –
+      –
+      –
+      –
+        –
+      –
Left Front
Center
+      –
Left Surround
Right Front
+      –
Right Surround
+      –
Subwoofer
Receiver
HIGH LEVEL
+               –              –               +
L                           R
OUT
IN
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