INTRODUCTION
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 combin-
ing 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.
Smooth, Accurate, Extended
Response:
The J Series transducers,
computer-optimized dividing net-
works, and bass reflex cabinets com-
bine 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
creating any interference or distortion
of the video picture.
PLACEMENT
Bookshelf Models:
For the best
stereo reproduction, the two loud-
speaker systems should be an equal
distance from your listening position
and separated so that the angle
between them, at the listening posi-
tion, is between 40 and 60 degrees
(see Fig. 1). For example, if your lis-
tening 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 loudspeak-
ers in corners or against a wall will
result in the strongest (not necessa-
rily 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 rec-
ommend that the systems be placed
so that the high frequency transduc-
ers are positioned approximately at
ear level of a seated listener. Every
room is different and there are differ-
ent tastes, so don’t hesitate to experi-
ment on your own.
40
°
-60
°
Fig. 1
2
J Series OM 7/27/98 3:50 PM Page 2
