LXE 550 - JBL Audio User Guide / Operation Manual

lxe 550 user guide / operation manual
Model
LXE 550
Pages
8
Size
39.06 KB
Type
PDF
Document
User Guide / Operation Manual
Brand
Device
Audio
File
lxe-550.pdf
Date

Read JBL LXE 550 User Guide / Operation Manual online

LXE SERIES 
OWNER’S 
MANUAL
LXE
L X E 3 3 0
L X E 5 5 0
L X E 7 7 0
L X E 9 9 0
S E R I E S
LXE owners manual  7/27/98 4:34 PM  Page 8
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 low-
loss/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.  
2
LXE owners manual  7/27/98 4:34 PM  Page 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.
3
PLACEMENT
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.
40°-60°
Fig. 1
LXE owners manual  7/27/98 4:34 PM  Page 2
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, or the
banana plug, 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 the black or (–) (see Fig. 2).
Connecting the loudspeakers in
this manner ensures that they will
be in phase; that is, work together
rather than in opposition.
Connecting the loudspeakers out
of phase will not damage them,
but will result in less bass and
poor imaging.
4
CONNECTIONS
To connect the loudspeaker
systems to the receiver or
amplifier, use two-conductor
insulated wire. Your JBL dealer 
can recommend suitable cables,
or you can buy wire at most
hardware or electronic stores.
High quality connectors and cable
offer consistent performance that
does not deteriorate over time. We
recommend #16 AWG wire as a
minimum size. If your speaker 
is more than 30  feet (10 m) from
your receiver or amplifier, use
larger diameter lower gauge wire.
Connections are made at the
terminals located on the back of
the loudspeaker system. The
terminals accept bare wire or dual
banana plugs, either of which will
provide easy, secure connections.  
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.
1. First determine the distance
between the most distant speaker
and the receiver or amplifier. 
2. Now make the hookup wires for
both speakers this length, even if
one LXE Series loudspeaker is
much closer to your amplifier than
the other. This will help maintain 
proper signal balance.
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 
Left 
Speaker
Amplifier/Receiver
Right
Speaker
Red Blk.
(+)
+
+
(–)
Red
R
L
Blk.
(+) (–)
Fig. 2
LXE owners manual  7/27/98 4:34 PM  Page 3
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Here you can read online and download JBL LXE 550 User Guide / Operation Manual in PDF. LXE 550 user guide / operation manual will guide through the process and help you recover, restore, fix, disassemble and repair JBL LXE 550 Audio. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.