JBL SUB 140 Service Manual ▷ View online
Service Manual
SUB 140P / 230
Active 8” Subwoofer.
Weave design, Studio Series.
Weave design, Studio Series.
CONTENTS
PCB
DRAWINGS
12
OWNER’S MANUAL
2
WIRING
DIAGRAM
23
SPECIFICATIONS
5
BLOCK
DIAGRAM
24
PACKAGE
DRAWING 6
SCHEMATIC DIAGRAMS
25-28
EXPLODED VIEW AND PARTS
7
PARTS
LIST
8
Released
EU2011
Harman
Consumer Group, Inc.
Rev 0, 03/2011
8500 Balboa Boulevard
California
91329
1X
Included Items
1X
Your new JBL
®
SUB140P/230-C 150-watt powered subwoofer
incorporates an 8" (200mm) down-firing cone transducer and
a built-in high-performance 150-watt amplifier that deliver the
powerful, dynamic and accurate low-frequency performance that
makes
your film soundtracks and music come alive. And with line-level
and LFE inputs, adjustable crossover and phase controls and au-
tomatic turn on/off, the SUB140P/230-C is also simple to connect
and set up.
We’re confident that this JBL subwoofer will provide every note of
enjoyment that you expect – and that when you think about pur-
chasing additional audio equipment for your home, car or office,
you will once again choose JBL products.
This quick-start guide contains all the information you need to set
up, connect and adjust your new subwoofer. For more in-depth
information, go to our Web site: www.jbl.com.
thank You For choosIng thIs JBl
®
Product
suB140P/230-c
150-Watt, 8" (200mm) Powered Subwoofer
quIck-start guIde
0246CSK - JBL SUB140P OM_v4.indd 1
04/10/10 13:54:32
JBL
SUB 140P/230 Service Manual
Page 2 of 28
2
suBwooFer rear-Panel controls and connectIons
On/Standby LED: When the Power-On Mode switch is in the “Auto”
position, this LED indicates whether the subwoofer is in the On or Standby
state:
• When the LED glows green, the subwoofer is turned on.
• When the LED glows red, the subwoofer is in the Standby mode.
• When the LED glows red, the subwoofer is in the Standby mode.
When the Power switch is set to “Off,” the LED will not light up, no matter
what setting the Power-On Mode switch is in.
Crossover Control: This control determines the highest frequency at
which the subwoofer reproduces sounds. The higher you set the Cross-
over control, the higher in frequency the subwoofer will operate and the
more its bass will “overlap” that of the satellite speakers. This adjust-
ment helps achieve a smooth transition of bass frequencies between the
subwoofer and the satellites for a variety of different rooms and subwoofer
locations.
NOTE: The Crossover control functions only when you are using the Line-
Level In L/R connectors. The Line-Level In LFE connector bypasses the
subwoofer’s built-in crossover and Crossover control.
Phase Switch: This switch determines whether the subwoofer driver’s
piston-like action moves in and out in phase with the satellite speakers. If
the subwoofer were to play out of phase with the satellite speakers, the
sound waves from the satellites could partially cancel out the sound waves
from the subwoofer, reducing bass performance and sonic impact. This
phenomenon depends in part on the placement of all the speakers relative
to each other in the room.
Power-On Mode Switch: When this switch is set in the “Auto” posi-
tion and the Power switch is set to “On,” the subwoofer will automatically
turn itself on when it receives an audio signal and will enter the Standby
mode when it has gone without receiving an audio signal for 20 minutes.
When this switch is set in the “On” position, the subwoofer will remain on
whether or not it is receiving an audio signal.
Subwoofer Level Control: Use this control to adjust the subwoofer’s
volume. Turn the knob clockwise to increase the volume; turn the knob
counterclockwise to decrease the volume.
Line-Level In LFE Connector: This input bypasses the subwoofer’s
internal crossover circuitry, so use it only with a receiver or processor sub-
woofer output that has been low-pass filtered. If your receiver or processor
does not have a dedicated subwoofer output that is low-pass filtered, use
the subwoofer’s Line-Level In L/R Connectors (see below) instead.
Use the supplied mono RCA cable (purple connectors) to connect the
Line-Level In LFE connector to the dedicated subwoofer output of a
receiver or preamp/processor.
Line-Level In L/R Connectors: These inputs pass through the subwoof-
er’s built-in crossover. Use them if your receiver or preamp/processor does
not have a dedicated subwoofer output that is low-pass filtered.
Power Switch: Set this switch in the “On” position to turn the subwoofer
on. The subwoofer will then be in On or Standby mode, depending on the
setting of the Power-On Mode switch.
Power Cord: After you have made and verified all subwoofer and speaker
connections described in this manual, plug the power cord into an ac-
tive,
unswitched electrical outlet for proper operation of the subwoofer.
DO NOT plug this cord into the accessory outlets found on some audio
components.
This Class B digital apparatus complies with Canadian ICES-003.
Cet appareil numérique de la classe B est conforme à la norme
NMB-003 du Canada.
Cet appareil numérique de la classe B est conforme à la norme
NMB-003 du Canada.
/23
Subwoofer
Level Control
Crossover
Control
On/Standby
LED
Phase Switch
Power-On
Mode Switch
Line-Level In
LFE Connector
Line-Level In
L/R Connectors
Power Switch
Power Cord
0246CSK - JBL SUB140P OM_v4.indd 2
04/10/10 13:54:32
JBL
SUB 140P/230 Service Manual
Page 3 of 28
3
www.jbl.com
ENGLISH
PlacIng the suBwooFer
connectIng the suBwooFer
The performance of a subwoofer is directly related to its placement in the listening room
and its physical position relative to the other speakers in the system.
While it is true that in general our ears do not hear directional sounds at the low
frequencies where subwoofers operate, when installing a subwoofer within the limited
confines of a room, the reflections, standing waves and absorptions generated within
the room will strongly influence the performance of any subwoofer system. As a result,
the specific location of the subwoofer in the room does become important to the
amount and quality of bass that is produced.
For example, placing the subwoofer next to a wall generally will increase the amount of
bass in the room; placing it in a corner (
1) generally will maximize amount of bass in the
room. However, corner placement can also increase the destructive effect of standing
waves on bass performance. This effect can vary depending on the listening position
– some listening positions may yield very good results while others may have far too
much (or too little) bass at certain frequencies.
In many rooms, placing the subwoofer along the same plane as the left and right speak-
ers (
2) can produce the best integration between the sound of the subwoofer and that
of the left and right speakers. In some rooms, the best performance could even result
from placing the subwoofer behind the listening position (
3).
We strongly recommend that you experiment with placement before choosing a final
location for your subwoofer. One way you can determine the best location for the sub-
woofer is by temporarily placing it in the listening position and playing music with strong
bass content. Move around to various locations in the room while the system is playing
(putting your ears where the subwoofer would be placed), and listen until you find the
location where the bass performance is best. Place the subwoofer in that location.
Front Left
Speaker
TV
Center
Speaker
Front Right
Speaker
Surround Left
Speaker
Surround Right
Speaker
1.
2.
3.
tO a RECEIvER OR PREaMP/PROCESSOR wIth a LOw-PaSS FILtERED DEDICatED SubwOOFER OutPut
tO a RECEIvER OR PREaMP/PROCESSOR wIth PREaMP OutPutS
Receiver or
Amplifier
Receiver or
Amplifier
SUB140P/230-C
Subwoofer
SUB140P/230-C
Subwoofer
Mono RCA Cable
(included)
Mono RCA Cable
(included)
Mono RCA Cable
(not included)
0246CSK - JBL SUB140P OM_v4.indd 3
04/10/10 13:54:32
JBL
SUB 140P/230 Service Manual
Page 4 of 28
