MR 26S — JBL Audio User Guide / Operation Manual

MR 26S
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User Guide / Operation Manual

View JBL MR 26S User Guide / Operation Manual online

Congratulations on choosing JBL MR26S
Loudspeakers. Their highly accurate,
uncolored and balanced sound character
will greatly increase your enjoyment of
recorded music and movies. JBL speak-
ers are built with careful attention to
detail, using only the highest quality mate-
rials. They will provide many years of
excellent performance.
The MR26S is the result of combining 
traditional JBL Signature Sound perform-
ance values with elegant contemporary
Maximum Radiating Surface Area:
MR26S transducers utilize new transduc-
er technology by extending the surface
area of the cone allowing for a shorter
excursion of the driver without sacrificing
critical air movement.
Maximum Efficiency:
Larger air
movement coupled with shorter coil
movement allows the MR26S transducers
to be very efficient.
Maximum Transducer Control:
Reduces distortion by tightening the con-
trol of driver excursion and increasing 
driver linearity.
Smooth, Accurate, Extended
The MR26S transducers,
computer-optimized dividing networks,
and bass reflex cabinets combine to give
clear, crisp, accurate, JBL Signature
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 accu-
MR26S-OM  7/27/98 3:00 PM  Page 1
rate) bass. The MR26S speakers have
their ports in the front so you can place
the rear of the speaker up against a wall.
For the best stereo imaging, we recom-
mend that the systems be placed so that
the high frequency transducers are posi-
tioned 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.
To connect the loudspeaker systems to
the receiver or amplifier, use two-conduc-
tor 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
MR26S 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.
1. First determine the wire length needed
between the most distant speaker and the
receiver or amplifier. 
2. Now make the hookup wires for both
speakers this length, even if one loud-
speaker 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 a visu-
al 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 print-
ed “+” 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 con-
nected identically. Push down on the but-
ton 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. 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.
Fig. 1
Red Blk.
(+) (–)
Fig. 2
MR26S-OM  7/27/98 3:00 PM  Page 2
Hookup Information
Your MR26S speakers were designed to
work with your JBL Mini System. The Mini
System has speaker output connections
for hooking up just one pair of loudspeak-
ers. Do not attempt to hook up any extra
speakers through the same connections
as your MR26S speakers. Using more
than just the two MR26S speakers could
lead to a low impedance load causing
damage to the amplifier.
Thanks to their high efficiency, the JBL
MR26S Loudspeakers will produce rea-
sonable volume levels in a room of mod-
erate 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 amplifier’s power rating per
channel must not exceed the maximum
recommended amplifier power for that
specific loudspeaker model. Please see
the specification section for details.
Following these guidelines will provide vir-
tually distortion-free sound reproduction
and long loudspeaker life.
The vast majority of new speaker “mal-
functions” end up being traced to connec-
tions or switch settings. To avoid packing
up correctly functioning speakers and
sending them off, only to find that they’re
not really at fault, check the following tips
first, before requesting service.
No sound at all or very faint sound
from both speakers
. Amp/receiver tape monitor button pushed
in while using CD, FM or phono inputs.
Wrong speaker switch, “A” or “B”
speaker output.
. Sound source (CD, cassette deck,
turntable) not turned on, not activated, 
not hooked up or not selected on
amp/receiver front panel.
No sound from one speaker
Balance control turned all the way left
or right.
Speaker wire has become disconnected.
. One of the connections between sound
source and amp/receiver is faulty or has
become disconnected.
Both speakers play at low volumes 
but shut off as volume is increased OR
sound turns on and off intermittently. 
A few strands of speaker wire may be
shorting out. Recheck the connections.
Bass is very weak AND/OR sound
seems to come from each speaker sep-
arately, without creating a stable stereo
image between the speakers.
The polarity (+ & –) of one speaker has
been reversed relative to the other.
Double check connections.
Speakers are too far away from back
and side walls or too far apart. Experiment
again with the speaker placement. If you
are still encountering problems, consult
your JBL dealer.
The grille is held in place by pins near the
edges. To remove the grille, grasp it by
both top and bottom edges and pull gen-
tly. To replace grille, re-position it carefully
and press gently at the corners. Do not
push on the center area of the grille. 
The loudspeaker cabinet may be cleaned
with a slightly damp cloth. To remove dust
from the grille cloth, use a vacuum with a
brush attachment. Spots may be removed
with a commercial spot remover. Do not
use any cleaners or solvents on the
speaker drivers themselves.
Should your loudspeaker ever need serv-
ice, return it to the JBL dealer from whom
MR26S-OM  7/27/98 3:00 PM  Page 3
it was purchased. If for some reason this
is impractical, in the United States, call
800-336-4JBL for your nearest warranty
station. Military personnel who pur-
chased from authorized military outlets
should return them to a similar outlet
or contact:
Mohawk Marketing Corp
149 Business Park Drive
P.O. Box 62229
Virginia Beach, VA 23462
Phone: 804-499-8901
Fax: 804-497-6690
If purchased outside the United States,
contact your local distributor to make
arrangements for repair service.
Do not
return products to the JBL factory
without prior authorization.
*The maximum recommended amplifier power rating will insure proper system headroom to allow
for occasional program peaks. We do not recommend sustained operation at these maximum
power levels.
High Frequency 
10mm Ti
Dome Transducer
Midrange Transducer
(Nitrile Polymer Fibre Cone)
Low Frequency Transducer
6-1 ⁄ 2" 
(Nitrile Polymer Fibre Cone)
Crossover Frequency
4.5 kHz
55 Hz to
Response (– 6 dB)
20 kHz
Sensitivity (1 Watt/1 Meter)
88 dB
Nominal Impedance
8 ohms
10 to 100
Amplifier Power*
External Dimensions 
Height 15"
External Dimensions 
381 mm
216 mm
254 mm
Weight (each)
12 lbs
5.5 kg
Shipping Weight
28 lbs
12.7 kg
JBL Consumer Products, Inc.
80 Crossways Park West
Woodbury, NY 11797
800 336 4JBL (4525)
A Harman International Company
Part No. 320777-001
JBL continually strives to improve its products. New materials, production methods and design
refinements are introduced into existing models without notice as a routine expression of our design
philosophy. For this reason, JBL loudspeakers may differ in some respect from their published 
specifications and descriptions, but will always equal or exceed the original specifications unless 
otherwise stated.
MR26S-OM  7/27/98 3:00 PM  Page 4
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Download JBL MR 26S User Guide / Operation Manual

Here you can view online or download JBL MR 26S User Guide / Operation Manual in pdf. This User Guide / Operation Manual can help you recover, restore, fix, disassemble and repair JBL MR 26S Audio. Information contained in JBL MR 26S service manual (repair manual) typically includes:

  • Disassembly, troubleshooting, programming, maintenance, remote, adjustment, installation and setup instructions.
  • Schematics, wiring and block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Parts list (bill of materials).