JBL LXE550 BLK, LXE550, LXE770, LXE330, LXE990 User Manual

LXE SERIES

OWNER’S

MANUAL

LXE330
LXE550
LXE770
LXE990

LXE

SERIES

INTRODUCTION

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

The LXE Series rivals the
performance of loudspeakers
available at considerably higher
price points; and achieves
remarkable imaging, sound stage,
and musicality.

Acoustic Reflection
Cancellation (ARC): Provides

smooth, well-defined high
frequency response. Because the
LXE tweeter faceplate has no
concentric or parallel lines, it
produces high frequency signals
without diffraction.

Pure Titanium, Smooth Dome
Tweeter with Diamond
Surround: Provides low

resonance frequency, low
distortion, flat and smooth high
frequency response, and no
break-up in the audio range.
The result is a well-defined high
frequency output.

High Polymer Laminate
Midrange Drivers and Woofers:

Combine to provide tight bass and
well-defined, smooth midrange,
without harshness, stridency, or
listener fatigue.

High Quality Crossover
Network: The computer-optimized

dividing network employs up to
third-order (18 dB per octave)
crossover sections. JBL’s use of
high quality capacitors and low­loss/low-distortion inductors
assures freedom from phase or
amplitude distortions.

Neoprene-covered Baffle-board:

Specially designed, acoustically
damping, and absorbent
Neoprene foam surface surrounds
the speaker’s drivers and absorbs
diffraction waves.

Acoustically Optimized Cabinet
and Grille Design: Provide

smooth uncolored sound and
eliminate diffraction and unwanted
resonances.

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PLACEMENT

40°-60°

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 (2.5 to 4 m) from each
speaker, the two systems should
be about 8 feet (2.5 m) apart.
Placing the loudspeakers in
corners or against a wall will result
in the strongest (not necessarily
the most accurate) bass. Since all
LXE models have ports on their
front baffles, the speakers may be
pushed up against a wall or
bookshelf surface.

Fig. 1

Compact systems will also benefit
from placement on stands or
shelves. For the best stereo
imaging, we recommend that the
systems be placed so that the high
frequency transducers are as
close as possible to the ear level
of a seated listener. Every room is
different and there are different
tastes. So don’t hesitate to
experiment on your own.

POWER HANDLING

Thanks to their high efficiency,
the LXE Series loudspeakers will
produce reasonable volume levels
in a room of moderate size with
very little amplifier power.
However, using a small amplifier
to obtain the desired volume
listening levels may lead to
overdriving the amplifier. This will
generate high distortion levels and
may cause damage to your
loudspeaker. For the best
performance, an amplifier should
be selected with an output rating
that is greater than the maximum
power that will be used. This
margin of reserve power will
ensure that the amplifier will not
attempt to deliver more power
than its design allows. However,
the power amplifier’s power rating
per channel must not exceed
the maximum recommended
amplifier power for that specific
loudspeaker model. Please see
the specifications section for
details. Following these guidelines
will provide virtually distortion-free
sound reproduction and long
loudspeaker life.

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