tuRnIng thE SubwOOFER On anD OFF
Set the subwoofer’s Power switch to the “On” position.
• If the subwoofer’s Power-On Mode switch is set to “Auto,” the
subwoofer will automatically turn itself on when it receives an audio
signal, and it will go into Standby mode after it has received no audio
signal for 20 minutes. The subwoofer’s LED will glow green when the
subwoofer is on and will glow red when the subwoofer is in Standby.
• If the Power-On Mode switch is set to “On,” the subwoofer will remain
on at all times. The subwoofer’s LED will glow green.
If you will not be using the subwoofer for an extended period – for
instance, if you’re going on vacation – set the Power switch to the “Off”
position.
SubwOOFER aDJuStMEntS: CROSSOvER
COntROL
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 the Crossover
control.
The Crossover control adjusts the subwoofer’s
built-in crossover between 50Hz and 200Hz. The
higher you set the Crossover control, the higher in
frequency the subwoofer will operate and the more
its bass will “overlap” that of the satellite speakers.
This adjustment helps achieve a smooth transition of bass frequencies
between the subwoofer and the satellites for a variety of different rooms
and subwoofer locations.
To set the Crossover control, listen for the smoothness of the bass. If the
bass seems too strong at certain frequencies, try a lower Crossover con-
trol setting. If the bass seems too weak at certain
frequencies, try a higher Crossover control setting.
SubwOOFER aDJuStMEntS: vOLuME
Use the Subwoofer Level control to set the
subwoofer’s volume. Turn the knob clockwise to
increase the subwoofer’s volume; turn the knob
counterclockwise to decrease the volume. Once you
have balanced the subwoofer’s volume with that of
the other speakers in your system, you shouldn’t
have to change it.
Notes on Setting Subwoofer Volume:
• Sometimes the ideal subwoofer volume setting for music is too loud
for films, while the ideal setting for films is too quiet for music. When
setting the subwoofer volume, listen to both music and films with
strong bass content and find a “middle ground” volume level that
works for both.
• If your subwoofer always seems too loud or too quiet, you may want
to place it in a different location. Placing the subwoofer in a corner will
tend to increase its bass output, while placing it away from any walls
or corners will tend to lessen its bass output.
SubwOOFER aDJuStMEntS: PhaSE
The Phase 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 waves from the sub-
woofer, reducing bass performance and
sonic impact. This phenomenon depends
in part on the placement of all the speak-
ers relative to each other in the room.
Although in most cases you should leave
the Phase switch in the “Normal” position,
there is no absolutely correct setting for
the Phase switch. When the subwoofer
is properly in phase with the satellite speakers, the sound will be clearer
and have maximum impact, and percussive sounds like drums, piano and
plucked strings will sound more lifelike. The best way to set the Phase
switch is to listen to music that you know well and to set the switch in the
position that gives drums and other percussive sounds maximum impact.
sPecIFIcatIons
Low-frequency
transducer:
8" (200mm) cone (down-firing)
Enclosure type:
Ported (down-firing)
Amplifier power:
150 watts
Frequency response:
32Hz – 150Hz (–6dB)
Audio controls:
Volume level, crossover frequency, phase
Connections:
RCA line-level and LFE inputs
Power requirement:
120V, 60Hz (US); 220V – 230V,
50Hz/60Hz (EU)
Power consumption:
<1W (8mA@120V) standby;
300w (2.5A@120V) peak
Dimensions (W x H x D): 19" x 14" x 14" (483mm x 355mm x
355mm)
Weight:
22 lb (10kg)
CROSSOVER
50 (Hz) 200
oPeratIng the suBwooFer
© 2010 HARMAN International Industries, Incorporated. All rights reserved.
JBL is a trademark of HARMAN International Industries, Incorporated, registered in the United States and/or other countries.
Features, specifications and appearance are subject to change without notice.
Part No. 950-0339-001, Rev.: A
HARMAN Consumer, Inc.
8500 Balboa Boulevard, Northridge, CA 91329 USA
www.jbl.com
0246CSK - JBL SUB140P OM_v4.indd 4
04/10/10 13:54:33
