JBL Speaker PB8 User Manual

C) Setting the Volume and Crossover Frequency:  
Volume  
VOLUME  
B) Speaker Level Connection  
(also knows as "High-Level").  
Step 1  
The Crossover Frequency control  
When setting the volume control at the  
subwoofer, begin with your main speakers  
playing at a normal listening level and the  
volume control at the subwoofer completely  
in the off position (counterclockwise  
position). Then, begin to turn up the  
volume at the subwoofer slowly (clockwise)  
until the desired bass response is achieved.  
Bass output will then be regulated by your  
CROSSOVER  
determines the frequency below which the  
subwoofer will play. This frequency is  
manually controlled and is continuously  
variable between 60-180Hz. You can  
experiment with which position works best  
with your main speakers by turning  
this control until the sound of the low  
Connect the audio/video receiver’s Left/Right main channel outputs to  
the JBL PB8 L/R Speaker Level Inputs. Make sure to connect "+" (Red)  
to "+" ( Red), and "-" ( Black) to "-" (Black). (Optionally, you may  
connect your Left/Right speakers as shown below.  
Subwoofer Placement  
Low frequency sound is generally non-directional. This allows for great  
flexibility in the placing of a subwoofer, as it is difficult for the human  
ear to discern where the low frequency sound originates. Ideally,  
however, the subwoofer will be placed on the same plane as the main  
left/right speakers.  
MIN  
MAX  
60Hz  
180Hz  
frequency coming from the subwoofer is  
nicely blended with the sound of your main speakers.  
A/V receiver’s volume control.  
Do not block the tuned  
port: Allow a few inches  
of space behind the  
subwoofer.  
Crossover setting tip:  
Volume setting tip:  
POWERED SUBWOOFER  
LINE IN  
LFE  
POWER  
Have one person sit at the regular listening position, and a second  
person turn up the volume at the subwoofer until the desired bass  
output is achieved at the listening position. Remember most natural  
sounding bass results when bass reproduction is balanced with the  
main speakers.  
When using small speakers (speakers with a 6" or less main woofer)  
set this control toward the "180" position. When using larger  
speakers (speakers with an 8" or more main woofer) set the control  
closer to the "60" position.  
AUTO  
VOLUME  
CROSSOVER  
L
OFF  
ON  
PHASE  
R
PB8  
0º  
180º  
MIN  
MAX  
60Hz  
180Hz  
HIGH LEVEL OUT  
HIGH LEVEL IN  
INSTRUCTIONAL MANUAL  
Placement Tip:  
R
TO SPEAKERS  
L
R
FROM AMPLIFIER  
L
Bass output varies with position. For more bass output, place the  
subwoofer near a wall boundary. Placing the subwoofer closer to  
a corner of the room will increase the bass output considerably.  
Specifications  
PB8  
Step 2  
Amplifier Power:  
100 Watts peak power  
High-Level connection Tip:  
Driver:  
Inputs:  
Outputs:  
8" Reinforced Paper Cone  
High-Level & Low-Level @ 120Hz  
High-Level w/ High Pass @ 120Hz  
Low-Level Full Range  
60Hz-180Hz - Continuously variable  
34Hz-180Hz  
153/4” x 103/4” x 153/8”  
When using small satellite speakers, connecting the JBL subwoofer  
with the Speaker Level inputs and then connecting L/R satellites to  
the "Speaker out" will automatically limit the low frequency sent to  
the small speakers with the high-pass filter built into the JBL  
subwoofer. This is helpful to small speakers, in that they will then  
not be required to reproduce frequencies that may be beyond their  
operating range.  
Connecting The Subwoofer  
A) Line Level Connection  
(also knows as "Low-Level").  
Connect the audio/video receiver or processor’s subwoofer output,  
to the JBL Subwoofer’s L/R Line Level input. (Optionally, you may  
connect your Left/Right speakers as shown below.  
Crossover Frequency:  
Frequency Response:  
Dimensions (HWD):  
Weight:  
26 lbs  
You may now plug your subwoofer’s power cord to the A/C wall outlet.  
You are now ready to use your new JBL subwoofer.  
Congratulations…  
LINE IN  
LFE  
POWER  
AUTO  
VOLUME  
CROSSOVER  
L
…for purchasing a JBL Powered Subwoofer.  
OFF  
ON  
PHASE  
Step 3  
R
When used with your current Audio/Home-Theatre system, the JBL subwoofer will deliver all the realism  
and excitement present in today’s music and film digital soundtracks.  
0º  
180º  
MIN  
MAX  
60Hz  
180Hz  
HIGH LEVEL OUT  
HIGH LEVEL IN  
Powering Up  
A) On/Off Switch  
Your may choose to have your Subwoofer turn  
on automatically once it senses an incoming  
signal. In that case please select the "Auto"  
AUTO  
This subwoofer has been designed to give you many years of trouble-free listening enjoyment. Though easy  
to install, we recommend that you read carefully through this instruction manual, and to save your bill  
of sale in the unlikely event that your subwoofer requires servicing.  
R
TO SPEAKERS  
L
R
FROM AMPLIFIER  
L
OFF  
ON  
position on the back of the amplifier. The  
amplifier will turn itself off to stand-by mode if it does not sense a  
signal after approximately 10 seconds. When listening at very low  
levels, the amplifier’s signal may be too low to turn the amplifier on  
automatically. In such cases please select the "On" position on the  
amplifier. When in the "Off" position the Subwoofer will remain in  
stand-by mode and not be triggered by an incoming signal.  
Safety Instructions  
• In the event of a malfunction, do not attempt  
to service the product yourself. Please contact  
your JBL dealer.  
• We recommend that the subwoofer be  
unplugged from the wall during lightning  
storms, and when not used for an extended  
period of time.  
B) Phase  
The Phase switch allows your subwoofer to  
match the output of the bass driver in relation  
to the other speakers in the listening room.  
180º  
The correct position for this switch is  
PHASE  
21000 TransCanada  
Baie D’Urfé, QC, Canada • H9X 4B7  
tel: (514) 457-2555 • fax: (514) 457-0055  
• Before making connections to your receiver or  
processor, please make sure the subwoofer is  
unplugged from the wall and that your the  
audio/video receiver or surround processor is  
in off position.  
Line-Level connection Tip:  
Some receivers and processors have a single subwoofer output. In  
such cases it is recommended to use a "Y" adapter.  
• Do not use wherever there is a risk that the  
subwoofer may come into contact with water  
or excessive moisture such as near pools,  
bathtubs and wet basements.  
0º  
whichever way produces more perceived bass. You may experiment by  
switching between 0º and 180º, and determining which position  
sounds best. In most cases, however, leaving the switch in the 0º  
position will produce the best results.  
© 2003 Jam Industries Ltd.  
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