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Model
MR 5
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8
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49.26 KB
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PDF
Document
User Manual / Operation Manual
Brand
Device
Audio
File
mr-5.pdf
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JBL MR 5 User Manual / Operation Manual ▷ View online

If only an 8-ohm rating is given, the
amp/receiver may or may not be
designed to handle 4-ohm combined
ratings.  Consult the owner’s manual
of the amp/receiver for clarification.
POWER HANDLING
Thanks to their high efficiency, the
JBL MR Series Loudspeakers will
produce reasonable volume levels in
a room of moderate size with very lit-
tle 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 loud-
speaker.  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 rec-
ommended amplifier power for that
specific loudspeaker model.  Please
see the specification section for
details.  Following these guidelines
will provide virtually distortion-free
sound reproduction and long loud-
speaker life.
TROUBLESHOOTING
The vast majority of new speaker
“malfunctions” end up being traced to
connections 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
1
. Amp/receiver tape monitor button
pushed in while using CD, FM or
phono inputs.
2.
Wrong speaker switch, “A” or  “B”
speaker output.
3
. Sound source (CD,cassette deck,
turntable) not turned on, not activat-
ed, not hooked up or not selected on
amp/receiver front panel.
No sound from one speaker
1. 
Balance control turned all the way
left or right.
2.
Speaker wire has become discon-
nected.
3
. 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 in-
creased OR sound turns on and 
off intermittently
A few strands of speaker wire may 
be shorting out. Recheck the con-
nections. Recheck the impedance of
the amp.
Bass is very weak AND/OR sound
seems to come from each speaker
separately, without creating a 
stable stereo image between the
speakers.
1.
The polarity (+ & –) of one speaker
has been reversed relative to the
other. Double check connections.
2. 
Speakers are too far away from
back and side walls or too far apart.
Experiment again with the speaker
placement. If you are still encounter-
ing problems, consult your JBL
dealer.
Additional Areas to Check When
Using an AV Receiver:
No sound at all or very faint sound
from the center channel or other
speakers
1.
Speaker wire has become discon-
nected.
MR SERIES LOUDSPEAKERS
5
MR Series OM  7/28/98 10:32 AM  Page 5
2
. One of the connections between
sound source and AV receiver/amp is
faulty or has  become disconnected.
3
. AV receiver/amp center channel
mode not selected.  Please select a
mode that activates the center
channel.
4.
Rear/surround information may not
be recorded in some scenes and
passages.
5.
AV receiver/amp “audio direct”
switch is activated.  This switch
should be off to activate the 5 
speaker surround mode.
6
. Sound source (VDP, VCR, CD,
cassette deck, turntable) not turned
on, not activated, not hooked up or
not selected on AV receiver/amp 
front panel.
GENERAL CARE
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 gently. To replace
grille, re-position it carefully and
press gently at the corners. Do not
push on the center area of the grille. 
NOTE: The M5 grille is non-
removable. Do not attempt to pry
the grille from the cabinet as this
will void your warranty. The rear
panels are removable to allow ser-
vice personnel access to the driver
components if needed.
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 com-
mercial spot remover. Do not use any
cleaners or  solvents on the speaker
drivers themselves.
SERVICE
Should your loudspeaker ever need
service, return it to the JBL dealer
from whom it was purchased. 
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.
6
MR Series OM  7/28/98 10:32 AM  Page 6
MR SERIES LOUDSPEAKERS
7
Specifications
MR Center
M5
MR25
MR26
Application
Center Bookshelf
Bookshelf
Bookshelf
Channel
High Frequency 
10mm Ti
2" Paper
10mm Ti
10mm Ti
Dome Transducer
Composite
(Cone)
Composite
Composite
Midrange Transducer
n/a
n/a
n/a
n/a
(Nitrile Polymer Fibre Cone)
Low Frequency Transducer
2 x 3.5"
5" 
5" 
6
1
2
(Nitrile Polymer Fibre Cone)
(Neo Magnet)
Crossover Frequency
4.5kHz
2.2kHz
4.5kHz
4.5kHz
Frequency
80 Hz to
75 Hz to
70 Hz to
55 Hz to
Response (– 6 dB)
20 kHz
20 kHz
20 kHz
20 kHz
Sensitivity (1 Watt/1 Meter)
87 dB
86 dB
87 dB
88 dB
Nominal Impedance
8 ohms 
8 ohms 
8 ohms
8 ohms
Recommended
10 to 80
10 to 50
10 to 75
10 to 100
Amplifier Power*
Watts
Watts
Watts
Watts 
External Dimensions 
Height 5
3
16
"
11"
12"
15"
Width
14
1
4
"
6
1
2
"
7
1
2
"
8
1
2
"
Depth
6
5
8
"
7
1
4
"
8
1
2
"
10"
External Dimensions 
Height
132 mm
280 mm
305 mm
381 mm
Width
362 mm
165 mm
190 mm
216 mm
Depth
168 mm
184 mm
216 mm
254 mm
Weight (each)
7 lbs
7 lbs
8 lbs
12 lbs
3.2 kg
3.2 kg
3.6 kg
5.5 kg
Shipping Weight
10 lbs
18 lbs
20 lbs
28 lbs
4.5 kg
8.2 kg
9.1 kg
12.7 kg
*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.
MR Series OM  7/28/98 10:32 AM  Page 7
Specifications
MR28
MR38
MR308II
MR310II
Application
Bookshelf
Bookshelf
Tower
Tower
High Frequency  14mm" Ti
14mm Ti
14mm Ti
14mm Ti
14mm Ti
Dome Transducer
Composite
Composite
Composite
Composite
Midrange Transducer
n/a
6
1
2
"
6
1
2
"
6
1
2
"
(Nitrile Polymer Fibre Cone)
Low Frequency Transducer
8"
8" 
8" 
10" 
(Nitrile Polymer Fibre Cone)
Crossover Frequency
3.5kHz
3.5kHz
3.5kHz
3.5kHz
Frequency
50 Hz to
45 Hz to
42 Hz to
40 Hz to
Response (– 6 dB)
20 kHz
20 kHz
20 kHz
20 kHz
Sensitivity (1 Watt/1 Meter)
90 dB
92 dB
92 dB
92 dB
Nominal Impedance
8 ohms 
8 ohms 
8 ohms
8 ohms
Recommended
10 to 125
10 to 150
10 to 150
10 to 175
Amplifier Power*
Watts
Watts
Watts
Watts 
External Dimensions 
Height 19
1
4
"
24"
32
3
16
"
36"
Width
10"
10"
10"
11
3
4
"
Depth
10"
12"
12"
12"
External Dimensions 
Height
489 mm
610 mm
818mm
915 mm
Width
254 mm
254 mm
254 mm
298 mm
Depth
254 mm
305 mm
305 mm
305 mm
Weight (each)
18 lbs
25 lbs
28 lbs
32 lbs
8.2 kg
11.3 kg
12.7 kg
14.5 kg
Shipping Weight
40 lbs
29 lbs
32 lbs
36 lbs
18.2 kg
13.2 kg
14.5 kg
16.4 kg
*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.
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 MR Series Loudspeakers may differ in some respect from their published specifications and descriptions, but
will always equal or exceed the original specifications unless otherwise stated.
A Harman International Company
Part No. 332408-001
Printed in Taiwan
MR SERIES LOUDSPEAKERS
MR Series OM  7/28/98 10:32 AM  Page 8
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