Jbl J900MV, J900MVBK User Manual

J SERIES

LOUDSPEAKERS

OWNER’S

MANUAL

J50
J520M
J620M
J820M
J830M
J900MV

J

SERIES

J1000MV
J Center

INTRODUCTION

40°-60°

Congratulations on choosing JBL
J Series Loudspeakers. Their highly
accurate, uncolored and balanced
sound character will greatly increase
your enjoyment of recorded music
and movies. JBL speakers are built
with careful attention to detail, using
only the highest quality materials.
They will provide many years of
excellent performance.

The J Series is the result of combin­ing traditional JBL Signature Sound
performance values with elegant
contemporary appearance.

Maximum Cone Surface Area:

The J Series transducers have been
designed to maximize the cone
surface area, a technology that
allows for shorter excursion of the
driver without sacrificing critical air
movement.

Maximum Efficiency: Larger air
movement coupled with shorter coil
movement allows the J transducers to
be very efficient. See specifications.

Maximum Transducer Control:

Reduces distortion by tightening
the control of driver excursion and
increasing driver linearity.

creating any interference or distortion
of the video picture.

PLACEMENT

Bookshelf Models: For the best

stereo reproduction, the two loud­speaker systems should be an equal
distance from your listening position
and separated so that the angle
between them, at the listening posi­tion, is between 40 and 60 degrees
(see Fig. 1). For example, if your lis­tening position is 8 to 12 feet (2.5m
to 4m) from each speaker, the two
systems should be about 8 feet
(2.5m) apart. Placing the loudspeak­ers in corners or against a wall will
result in the strongest (not necessa­rily the most accurate) bass. Except
for the J50, all J Series speakers
have their ports in the front so you
can place the rear of the speaker up
against a wall. In the case of the J50,
do not place the speaker closer than
3 inches (75mm) to the wall behind it
if possible.

For the best stereo imaging, we rec­ommend that the systems be placed
so that the high frequency transduc­ers are positioned approximately at
ear level of a seated listener. Every
room is different and there are differ­ent tastes, so don’t hesitate to experi­ment on your own.

Smooth, Accurate, Extended
Response: The J Series transducers,

computer-optimized dividing net­works, and bass reflex cabinets com­bine to give clear, crisp, accurate,
JBL 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 fields from

2

Fig. 1

J SERIES LOUDSPEAKERS

(2 ft. or less)

(2 ft. or less)

Tower Models: The Tower models
cabinet height and driver placement
allow for speaker placement directly
on the floor. The video shielding of
the Tower models allows for the
option of placement very close to a
Video Monitor/TV. When the Tower
models are used as Left and Right
Channel speakers in a Dolby Pro­Logic AV system, the shielding allows
the speakers to be placed up against
the sides of the Monitor/TV for a
compact AV system profile (see Fig.

2). If you desire better stereo imag­ing, the speakers should be moved
further apart from each other, approx­imately 2 to 3 feet (.75 to 1m) from
the sides of the Monitor/TV.

Fig. 2

Center Channel Model: As the
center channel contains the dialog
and other central action sounds, the
speaker should be located very close
to the Monitor/TV and centered with
the Monitor/TV’s center line. Place
the J Center directly on top of or
directly below the Monitor/TV with the
front edge of the speaker grille flush
with the edge of the Monitor/TV. You
should have your Left and Right
speakers within a 2 ft or less height
range of your Center Channel for
proper sonic performance (see Fig. 3).

type of your TV set. If color interfer­ence is observed, turn your TV off for
15 minutes and move the speaker
back about 1" from the front edge of
the TV. Turn on TV and recheck. If
this is not far enough, move back fur­ther and experiment until the interfer­ence disappears. You may have to
turn the TV off for a few minutes and
turn it on again to clear the screen.

Fig. 3

CONNECTIONS

To connect the loudspeaker systems
to the receiver or amplifier, use two­conductor insulated wire. Your JBL
dealer can recommend suitable
cables, or you can buy wire at most
hardware or electronic stores. We
recommend #16 AWG wire as a mini­mum size. If your speaker is more
than 30 feet (10m) from your receiver
or amplifier, use larger diameter
lower gauge wire. Connections are
made at the terminals located on the
back of the J Series speakers.

Preparing the Hookup Wire

Carefully plan your wire lengths
before cutting any speaker wire.
Be sure to allow plenty of extra
wire to help hide paths in corners,
along baseboards, etc.

In Case Color Interference Occurs:

The speaker is shielded to work with
video applications, however some
color interference may be observed
on the TV screen depending on the

1. For Left and Right Speakers, first
determine the wire length needed
between the most distant speaker
and the receiver or amplifier.

3