JBL J CENTER Owner'S Manual Download Page 4

2.  Now make the hookup wires for
both speakers this length, even if one
loudspeaker is much closer to your
amplifier than the other.  This will
help maintain proper signal balance.

(For the J Center, determine the
length needed from AV receiver’s
center channel output to speaker).

3. Strip off 

3

8

" of insulation from both

ends of each conductor.

4.  Twist each set of thin wires into a
tightly-bunched spiral.

5.  At this point you need to identify a
visual difference between the two
conductors of each molded pair of
speaker wire. Differentiating marks
can be a different color wire (copper
or “silver”); a strand of yarn in one
conductor; thin, raised ribs on one
part of the outer insulation; or a 
printed “+” marking on one of the
insulators. It does not make any 
difference which of the two strands of
wire go to (+) and (–) on the speakers
and amplifier, as long as all speakers
used in your system are connected
identically. Push down on the button
below the terminal and insert the wire
through the hole.

For each channel, the red terminal on
all loudspeakers should be connected
to the red or (+) speaker connection
terminal on the receiver or amplifier,

and the black to black or (–) speaker
connection terminal (see Fig. 4).
Connecting the loudspeakers in this
manner ensures that they will be in
phase; that is, work together rather
than in opposition.  This is very
important when connecting sev-
eral speakers together in a Dolby
Pro-Logic AV application. Connecting
the loudspeakers out of phase will
not damage them, but will result in
less bass and poor imaging.

When connecting the J Center or
other J Series speakers to a Dolby
Pro-Logic AV receiver, refer to the
instructions accompanying your AV
component for use of the “test tone”
to properly balance the sound output
from each speaker. The use of the
“test tone” and the controls on your
AV receiver will enable you to cor-
rectly balance the level (volume) of
sound coming from each speaker in
your Dolby Pro-Logic application.

Hooking Up Multiple Sets 
of Speakers

If your receiver has two complete
sets of speaker terminals (“A” and
“B”), it’s possible to hook up an addi-
tional pair of speakers for 

simultane-

ous

sound in another room. However,

some speakers may not be usable as
a second pair if you want to play two
sets at once. Before hooking up
another set of speakers besides your
J Series loudspeakers, check the 
following:

1.

Your amplifier’s 

minimum load

impedance.

2.

The 

nominal impedance 

of the

second set of speakers. Both of
these specifications are expressed in
ohms and both can be found in the
owner’s manuals which came with
your speakers and amp/receiver. The
receiver’s minimum load impedance
is determined by whether or not

4

Left 
Speaker

Amplifier/Receiver

Right
Speaker

Red Blk.

(+)

+

+

(–)

Red

R

L

Blk.

(+) (–)

Fig. 4

J Series OM  7/27/98 3:50 PM  Page 4

Summary of Contents for J CENTER

Page 1: ...J SERIES LOUDSPEAKERS OWNER S MANUAL J J50 J520M J620M J820M J830M J900MV J1000MV J Center S E R I E S...

Page 2: ...Signature Sound Video Shielding The J Center J900MV and J1000MV models incorporate magnetic shielding to allow use on or next to Video Monitors TVs The magnetic shielding prevents stray magnetic field...

Page 3: ...ce Occurs The speaker is shielded to work with video applications however some color interference may be observed on the TV screen depending on the type of your TV set If color interfer ence is observ...

Page 4: ...phase that is work together rather than in opposition This is very important when connecting sev eral speakers together in a Dolby Pro Logic AV application Connecting the loudspeakers out of phase wi...

Page 5: ...erve power will ensure that the amplifier will not attempt to deliver more power than its design allows However the amplifier s power rating per channel must not exceed the maximum rec ommended amplif...

Page 6: ...le is held in place by pins near the edges To remove the grille grasp it by both top and bottom edges and pull gently To replace grille re position it carefully and press gently at the corners Do not...

Page 7: ...tt 1 Meter 87 dB 86 dB 87 dB 88 dB Nominal Impedance 8 ohms 8 ohms 8 ohms 8 ohms Recommended 10 to 80 10 to 50 10 to 75 10 to 100 Amplifier Power Watts Watts Watts Watts External Dimensions Height 53...

Page 8: ...610 mm 818mm 915 mm Width 254 mm 254 mm 254 mm 298 mm Depth 254 mm 305 mm 305 mm 305 mm Weight each 18 lbs 25 lbs 28 lbs 32 lbs 8 2 kg 11 3 kg 12 7 kg 14 5 kg Shipping Weight 40 lbs 29 lbs 32 lbs 36...

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