JBL PB8 specifications Specifications, Congratulations…, …for purchasing a JBL Powered Subwoofer

Step 1

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.

B)Speaker Level Connection (also knows as "High-Level").

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.

C) Setting the Volume and Crossover Frequency:

CROSSOVER		The Crossover Frequency control
		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
60Hz	180Hz	frequency coming from the subwoofer is

nicely blended with the sound of your main speakers.

Volume
	VOLUME		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)
MIN		MAX	until the desired bass response is achieved.
			Bass output will then be regulated by your

A/V receiver’s volume control.

POWERED SUBWOOFER

PB8

INSTRUCTIONAL MANUAL

Do not block the tuned
port: Allow a few inches					POWER	LINE IN	LFE
of space behind	the
		AUTO		VOLUME		CROSSOVER	L
subwoofer.	OFF		ON
		PHASE					R
	0º		180º	MIN MAX		60Hz 180Hz
			HIGH LEVEL OUT			HIGH LEVEL IN

Placement Tip:
Bass output varies with position. For more bass output, place the	R TO	SPEAKERS	L	R FROM AMPLIFIER L
subwoofer near a wall boundary. Placing the subwoofer closer to
a corner of the room will increase the bass output considerably.

Crossover setting tip:	Volume setting tip:
When using small speakers (speakers with a 6" or less main woofer)	Have one person sit at the regular listening position, and a second
	person turn up the volume at the subwoofer until the desired bass
set this control toward the "180" position. When using larger
	output is achieved at the listening position. Remember most natural
speakers (speakers with an 8" or more main woofer) set the control
	sounding bass results when bass reproduction is balanced with the
closer to the "60" position.
	main speakers.

Specifications

Congratulations…

…for purchasing a JBL Powered Subwoofer.

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.

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.

Step 2

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.

				POWER		LINE IN	LFE
AUTO		VOLUME		CROSSOVER		L
OFF	ON
PHASE						R
0º	180º	MIN	MAX	60Hz	180Hz
	HIGH LEVEL OUT					HIGH LEVEL IN
R	TO SPEAKERS		L		R	FROM AMPLIFIER	L

High-Level connection Tip:

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.

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.

Step 3

Powering Up

A) On/Off Switch

	AUTO	Your may choose to have your Subwoofer turn
		on automatically once it senses an incoming
		signal. In that case please select the "Auto"
OFF		ON position on the back of the amplifier. The

PB8

Amplifier Power:

Driver:

Inputs:

Outputs:

Crossover Frequency:

Frequency Response:

Dimensions (HWD):

Weight:

100 Watts peak power

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” 26 lbs

Safety Instructions

•We recommend that the subwoofer be unplugged from the wall during lightning storms, and when not used for an extended period of time.

•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.

•In the event of a malfunction, do not attempt to service the product yourself. Please contact your JBL dealer.

•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.

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.

B) Phase

	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.
0º		180º The correct position for this switch is

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.

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Baie D’Urfé, QC, Canada • H9X 4B7

tel: (514) 457-2555 • fax: (514) 457-0055

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