JBL MR308II, MR310II, MR38, MR28, M5 User Manual
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MR SERIES
LOUDSPEAKERS
OWNER’S
MANUAL
M5
MR25
MR26
MR28
MR38
MR308II
MR
MR310II
SERIES
MR Center
INTRODUCTION
40°-60°
Congratulations on choosing JBL MR
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 MR Series is the result of combining traditional JBL Signature
Sound performance values with elegant contemporary appearance.
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 accurate) bass. Except
for the M5, all MR 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 M5,
do not place the speaker closer than
3 inches (75mm) to the wall behind it
if possible.
Maximum Radiating Surface Area:
MR Series transducers utilize new
transducer 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 MR 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 MR series trans-
ducers, computer-optimized dividing
networks, and bass reflex cabinets
combine to give clear, crisp, accurate, JBL Signature Sound.
PLACEMENT
Bookshelf Models: For the best
stereo reproduction, the two loudspeaker systems should be an equal
distance from your listening position
and separated so that the angle
For the best stereo imaging, we recommend that the systems be placed
so that the high frequency transducers are positioned 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.
Fig. 1
Tower Models: The Tower models
cabinet height and driver placement
allow for speaker placement directly
on the floor. 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
2
MR SERIES LOUDSPEAKERS
(2 ft. or less)
(2 ft. or less)
them, at the listening position, is
between 40 and 60 degrees. 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.
Center Channel Model: As the
center channel contains the dialog
and other central action sounds, the
speaker should be located very close
to the Monitor/TV and centered with
the Monitor/TV’s center line. Place
the MR Center directly on top of or
directly below the Monitor/TV with the
front edge of the speaker grille flush
with the edge of the Monitor/TV. You
should have your Left and Right
speakers within a 2 ft or less height
range of your Center Channel for
proper sonic performance (see Fig 2).
In Case Color Interference Occurs:
The speaker is shielded to work with
video applications, however some
color interference may be observed
on the TV screen depending on the
type of your TV set. If color interference is observed, turn your TV off for
15 minutes and move the speaker
back about 1" from the front edge of
the TV. Turn on TV and recheck. If
this is not far enough, move back further and experiment until the interference disappears. You may have to
turn the TV off for a few minutes and
turn it on again to clear the screen.
Fig. 2
CONNECTIONS
To connect the loudspeaker systems
to the receiver or amplifier, use twoconductor 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 MR Series 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. For Left and Right Speakers, 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
loudspeaker is much closer to your
amplifier than the other. This will
help maintain proper signal balance.
(For the MR Center, determine the
length needed from AV receiver’s
center channel output to speaker).
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
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
3
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