LSiM
series manual
ENGLISH
LSi Legacy
4
5
Table of Contents
Performance Objectives of the LSiM Series
Take Inventory
6
Applications/Configurations
LSiM702f/x Surround Loudspeaker Placement
Hookups, Preparation & Options
Standard Hookup
8
9
10
11
11
12
13
14
16
Wire Recommendations
Rubber Feet & Adjustable Floor Spikes
Caring For Your LSiM Loudspeakers
Specifications
Warranty
Polk Audio History—A Passion For Sound
Polk Audio was founded in Baltimore in 1972 by Johns
Hopkins University graduates Matthew Polk and George
Klopfer. Today, Polk Audio is a leading international manu-
facturer of high quality home and automotive loudspeakers.
Polk® products emphasize superior sound and build qual-
ity, and feature many patented and award-winning innova-
tions. Polk Audio has built a reputation as “The Speaker
Specialists®.” Polk products are sold throughout the
USA, Canada and in over 50 countries around the world.
Polk Audio’s mission has always been to build high
quality, great sounding speakers at affordable prices.
For the people of Polk Audio, building speakers
is not just a job; it’s a passion.
SRT Series, circa 1995
The LSi Legacy
First introduced in 2001, LSi represented Polk’s expression
of a true high-performance loudspeaker that was also
reasonably priced. LSi was created for the serious listener,
those who really enjoy music and who enjoy intently listen-
ing to their audio system. LSi delivered a flatter frequency
response with lower distortion and revealed more detail
than comparably priced speakers. The series was also
touted in the press for its tonal accuracy. LSi imaged
very well, thanks in part to the quality of the tweeter
and the wide dispersion of the small midbass drivers.
The series’ performance has made LSi Polk’s flagship
product for almost a decade. But after a decade, it was
time to revisit LSi. The result is not so much an evolution
of the current series as it is a re-engineering of the
qualities that have made LSi a great series.
LSi25, circa 2001
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Performance Objectives of the LSiM Series
The performance objectives for the new LSiM Series
predate the original LSi design and are, in fact, design
principles Polk Audio first set down during development
of its original Monitor loudspeakers.
Sound that virtually transports the listener to the scene
of the recorded performance.
These ideals have been guiding principles for Polk Audio’s
best high-performance loudspeakers:
1. Pleasing tonality, even during extended listening
at performance levels.
2. Crisp, lifelike impulses, transients and coherent
detail without any unnatural ringing or decay.
3. Natural reproduction of complex low frequency
instruments and special effects.
4. Uniform sonic representation within the listening
area and immersive spatial impression.
5. Reproduce concert/theater levels while
maintaining linearity and accuracy.
6. Compatibility with a wide array of electronics
both past, present and future.
7. Work as promised for many years of enjoyment.
2011 LSiM Series
5
LSiM702f/x®
LSiM704c
LSiM706c
6
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Take Inventory
Inside each loudspeaker carton:
1. Either one LSiM Floorstanding Speaker
or one Bookshelf Speaker or two F/X
Surround Speakers or one Center
Channel Speaker.
2. Zero Diffraction Magnetic Grille
(one per speaker, packed separately
except F/X Surround).
3. Literature Packet (Quick Start Guide,
Letter and Owner’s Manual on CD).
4. Floor Spike 5 mm Hex Key
(floorstanding speakers only).
5. Adhesive-Backed Rubber Pads
(4 for Bookshelf Speakers or
4 for Center Channel Speaker
or 8 for F/S Surround Speakers).
6. Wall Mount Template
(F/X surround speakers only).
LSiM703
LSiM707
LSiM705
7
Applications/Configurations
Floorstanding & Bookshelf Loudspeakers
To enjoy the most realistic stereo image and lifelike sound,
place the speakers so that an equilateral triangle is created
between the speakers and your favorite listening position.
Angle the speakers toward the middle as necessary in order
to support a more solid center image. And experiment with
the distance between your speakers and both the back and
side walls. You’ll experience some bass boost with the
speakers located close to walls.
The LSiM Series bookshelf loudspeakers were designed
to provide excellent performance on a bookshelf or placed
on a floor stand. For best results place LSiM bookshelf
loudspeakers so the tweeter height is within 6" (15cm)
of seated ear height. When using speaker stands,
select sturdy stands 30" - 36" (76.2 - 91.4cm) high.
Stereo
If you are using your LSiM Series bookshelf loudspeakers
as rear channels in a home theater system, they should be
placed on the rear or side walls, slightly above (and, on the
side walls behind) the listening position. Angle them toward
the listening area if possible.
TV
Center Channel Loudspeaker
With today’s modern flat panel TVs, the most popular
placement, and our recommendation for your center
channel speaker, is beneath your TV screen. You may
also place your center channel above your TV should
you choose. LSiM center channel loudspeakers are
very heavy, and we do not recommend wall mounting
them, unless placed on a sturdy shelf.
90°
90°
20°
20°
Note: If you have an older model television, you
could experience a color shift or image distortion
in your TV’s screen. If that is the case, move the
speaker away from your TV.
5.1
F/X Surround Loudspeakers
The LSiM Series surround loudspeakers must be wall-
mounted, either on side walls or rear walls; they have
built-in wall mounting keyhole slots. Mount the loud-
speakers 6-8 feet off the floor. If you’re setting up a 7.1
system, mount the Surround Back Left and Surround
Back Right loudspeakers at the same height as the
Surround Left and Surround Right loudspeakers.
TV
90°
90°
Make sure the material on which you plan to mount the
speakers (plaster, drywall, paneling, stone, etc.) can support
the weight of the speakers (LSiM702f/x = approx 28.9 lbs/
13.1 kg ea). Be aware of any electrical wiring or plumbing
that may be behind your walls.
20°
20°
Note: The LSiM702f/x Surround Loudspeaker should be
oriented so that its Dynamic Sonic Engine (3 1/4" mid-range
and 1" Ring Radiator tweeter) points toward your listening
area. Therefore, the F/X surround loudspeaker that would
serve as the right surround on a sidewall will become
the left surround on a rear wall.
7.1
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Right Surround
Dynamic Sonic
Engine
Left Surround
Dynamic Sonic
Engine
LSiM702f/x Surround Loudspeaker Placement
Wall Distance Switch (located on baffle underneath the grille)
If position limitations demand that your LSiM702f/x loudspeak-
ers be mounted closer than 2' (60cm) from side walls or ceiling,
the proximity of the surface can result in a response “bump”
between 50 and 200Hz. This can cause the loudspeakers to
sound “boomy.” The “Wall Distance” switch flattens response
and eliminates “boominess” without sacrificing deep bass
response for more lifelike sound. Set the switch accordingly,
<2' (60 cm) or >2' (60 cm).
TV
Wall Mounting LSiM702f/x
Prior to installation, hold the speaker in the chosen location,
6 to 8 feet off the floor, to make sure it safely clears obstacles
such as ceiling, adjacent walls, corners, beams, lighting fixtures
and door/window frames.
90°
90°
20°
20°
Using the keyhole slots in the bracket template (included),
mark the installation location of the two keyhole slots with
a pencil. Orient the template so that the small ends of the
keyhole slots are facing “up.”
L
R
1. If you are certain that there is a stud behind the
wall surface, drive a screw (not included) capable
of supporting the loudspeaker’s weight through
the wall and into the stud.
5.1
2. If there is no stud behind the wall at the chosen
location, install a wall anchor (not included) capable
of supporting the loudspeaker’s weight into the wall
by following the wall-anchor-manufacturer’s instructions.
3. For masonry walls, use a masonry drill bit and
#10 masonry anchor and screw (not included).
4. Tighten screws into stud or wall anchors, leaving
screw heads protruding 1/4" (6mm).
TV
90°
90°
5. Make all wire attachments now.
6. Line up the keyhole slots on the back of the speakers
so that the screw heads pass through the large center
hole of the slots.
7. Let the speaker slide straight down, allowing the screw
head to slip behind the smaller end of the keyhole slot.
8. Tug gently on the speaker to make certain that the
screws and bracket are properly aligned and that
the wall anchors are secure.
20°
20°
L
R
R
L
7.1
9. If the bracket is not held snug against the wall by the
screw heads, remove the speaker from the wall, drive
the screws in a little further and then remount the speaker.
9
Hookups, Preparation & Options
Wire Preparation
Follow the hookup directions included with your receiver/
amplifier. Strip 1/2" (12.7mm) of insulation from each of the
two conductors of the wire to expose the bare metal and
twist each of the individual conductors into single unfrayed
strands. Note that one of the terminals on the rear of each
speaker is red (+) and the other is black (–). Make certain
that you connect the wire from the positive (+) terminal
of your amplifier or receiver to the red (+) terminal on
your speaker and the wire from the negative (–) terminal
of your amplifier or receiver to the black (–) terminal on
your speaker. Most wire has some indicator (such as
color-coding, ribbing or writing) on one of the two
conductors to help you maintain consistency.
Binding Posts
Input Plate
To connect wire to the binding post, unscrew the binding
post cap and insert the bare wire into the hole near the
base of the binding post. Do not insert the insulated part
of the wire into the hole as this will not give you a good
connection. Tighten the binding post cap until it seats
firmly with the wire, but do not over tighten.
1
2
Connectors
You have several options when choosing connectors
for your speaker wires, and it’s really a matter of
personal preference. Three of the more commonly
used are banana plugs, spade lugs and bare wire.
Loosen hex nut.
Insert speaker wire
through hole.
If you know where you want to locate your speakers
and plan to set up your system and leave them there,
then bare wire will work fine. Just make sure there are
not stray strands of wire that could come into contact.
3
4
If you like to experiment with different speaker locations,
spade lugs or banana plugs offer more convenient options
when it comes to disconnecting and reconnecting wires.
Tighten hex nut.
Do not insert insulated
section of speaker wire.
Banana Plugs
LSiM binding posts have openings in the ends of their
caps to accept individual banana plugs. The binding
posts cannot accept dual banana plugs.
10
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Standard Hookup
Bi-Wiring & Bi-Amping
If you decide to bi-wire or bi-amp, you must remove
the jumpers between the terminal posts. Failure to do
this could result in damage to your amplifier and loud-
speakers. The binding post caps must be completely
removed to remove the jumpers, which use ring terminals.
There are color coded collars so you can identify which
is (+) or (–) after you remove the caps.
Bi-Wiring (see Figure 1)
Bi-wiring can provide noticeable improvements in the overall
transparency of your loudspeakers. Run separate speaker wires
to the low and high frequency drivers from a single amplifier
(the upper set of binding posts are for the high frequency drivers,
the lower set of binding posts are for the low frequency drivers):
after removing the jumpers, connect one set of speaker wires
to the upper terminals on each speaker and one set of wires
to the lower terminals. Connect the other ends of both wire
sets to the same amplifier outputs.
Figure 1: Bi-Wiring
Bi-Amping (see Figure 2)
Bi-amping allows you to use separate amplifiers for the high and
low frequency sections of your loudspeaker for greater dynamic
range and lower distortion. We recommend that your separate
amplifiers have identical gain to preserve the speaker’s voicing
balance. After removing the jumpers, connect the speaker wires
from the high frequency amplifier outputs to the upper set of
terminal posts on each speaker. Follow the same procedure
for connecting the low frequency amplifier outputs to the
lower set of terminals. Remember to maintain correct wiring
polarity (+ to +, – to –) in all connections.
Wire Recommendations
These recommendations are for all connections
from the amplifier/receiver to each speaker:
Figure 2: Bi-Amping
Runs
Gauge
16 or better
14
Lengths up to 25'
Lengths greater than 25'
but less than 50'
Lengths greater than 50'
but less than 75'
Lengths greater than 75'
12
12
11
LSiM Rubber Foot
LSiM Floor Spike
Rubber Feet & Adjustable Floor Spikes
Rubber feet and adjustable floor spikes are included
with your LSiM floorstanding loudspeakers to anchor
and stabilize the speaker on any type of floor. However,
you may wish to tilt the speaker backwards or forward
a tiny bit in order to optimize your listening area. This
is a subtle change you can experience that optimizes
imaging in your setup.
To Adjust The Floor Spikes
The floor spikes can be adjusted with the use of the
supplied 5 mm hex (Allen) wrench. Most floorstanding
speakers are adjustable only from below and require
two hands. The LSiM floor spikes are adjustable
from above.
Removing Rubber Feet
Note: If the speaker is stable on the floor, no adjustment
is necessary.
If the speaker is unstable, follow these steps:
1. The speaker will be inclined to settle on three of the
four spikes leaving one spike slightly off the floor.
2. Determine which spike needs to be adjusted.
3. Use the supplied hex wrench and turn it clockwise
to lower the spike or counterclockwise to raise it.
4. The threaded portion of the spike is coated with
a locking compound, so the spike may offer some
resistance when you turn it.
5. As the spike contacts the floor, it will become
more difficult to turn. At that point the speaker
should be stabilized.
Adjusting Floor Spike with Supplied
Hex (Allen) Wrench
Clockwise to raise
Counterclockwise
to lower
12
Polk Audio Customer Service: 1-800-377-7655 (Outside US & Canada: +1 410-358-3600) Monday-Friday, 9:00 AM-5:30 PM EST, polkcs@polkaudio.com
Caring for Your LSiM Loudspeakers
Enclosure Finish
Your LSiM enclosures (except LSiM702f/x) are finished
in real natural wood veneer. Clean these panels periodically
with a soft cloth and furniture polish to remove dust and
fingerprints. Never use harsh detergents and cleaning fluids.
Important Note: Do not use any petroleum based
cleaners or solvents on the loudspeaker cabinets.
• Clean wood panels with furniture polish and a soft cloth.
• Do not use furniture polish on black gloss lacquer.
• Clean black lacquer veneer with a damp cloth.
Baffle Smudges
Dust baffles and F/X end caps with a dry or damp cloth.
(A damp cloth is one that has been sprayed with a
recommended cleaner, not one soaked with water.)
We recommend you use a lint-free cloth; LSiM rubber
trim rings have a slight texture to them and can collect
fibers from a cloth that is not lint-free.
Dusting The Baffle
Use a can of compressed air for the grille and/or baffle
to dust. Use a “computer keyboard” vacuum but only
on the grille not the baffle.
13
Specifications
Type
LSiM707
tower
LSiM705
tower
LSiM703
bookshelf
Tweeter
1" (25mm) enhanced
Ring Radiator
1" (25mm) enhanced
Ring Radiator
1" (25mm) enhanced
Ring Radiator
Midrange
Midbass
Woofers
3 1/4" super cell
aerated polypropylene
3 1/4" super cell
aerated polypropylene
3 1/4" super cell
aerated polypropylene
6 1/2" super cell
aerated polypropylene
5 1/4" super cell
aerated polypropylene
6 1/2" super cell
aerated polypropylene
6" x 9" Cassini oval,
super cell aerated
polypropylene
5" x 7" Cassini oval,
super cell aerated
polypropylene
n/a
Frequency Response
(-3dB limits)
38 Hz - 30 kHz
42 Hz - 30 kHz
50 Hz - 30 kHz
Overall Frequency Response 20 Hz - 40 kHz
22 Hz - 40 kHz
20 W - 250 W
36 Hz - 40 kHz
20 W - 200 W
Steady State Recommended
Amp Power
20 W - 300 W
2.83V Sensitivity
Impedance
88 dB
88 dB
88 dB
compatible w/ 8 Ohm outputs
compatible w/ 8 Ohm outputs
compatible w/ 8 Ohm outputs
Orth Crossover
Tweeter/Midrange
Crossover Frequency
3.0 kHz
2.8 kHz
2.8 kHz
300 Hz
n/a
Midrange/Midbass
Crossover Frequency
300 Hz
280 Hz
Midbass/Woofer
100 Hz
100 Hz
Crossover Frequency
Tweeter High Pass
Slope (acoustic)
18 dB/oct
18 dB/oct
12 dB/oct
12 dB/oct
6 dB/oct
6 dB/oct
18 dB/oct
18 dB/oct
12 dB/oct
12 dB/oct
12 dB/oct
12 dB/oct
18 dB/oct
18 dB/oct
12 dB/oct
6 dB/oct
n/a
Midrange Low Pass
Slope (acoustic)
Midrange High Pass
Slope (acoustic)
Midbass Low Pass
Slope (acoustic)
Midbass High Pass
Slope (acoustic)
Woofer Low Pass
Slope (acoustic)
n/a
Midrange Enclosure Type
sealed
sealed
sealed
Midbass Enclosure Type
Woofer Enclosure Type
Dimensions W x H x D
sealed
dual PowerPort®
sealed
n/a
dual PowerPort
PowerPort
9 1/2" x 50 13/16" x 18 7/16"
8 5/16" x 47" x 14 3/8"
8 13/16" x 16 3/4" x 14 9/16"
(greatest overall depth, grille) 24.1 cm x 129.1 cm x 46.8 cm 21.1 cm x 119.4 cm x 36.5 cm 22.4 cm x 42.5 cm x 37 cm
Base Dimensions
10 1/2" x 20 5/16"
26.7 cm x 51.6 cm
9 1/4" x 16 1/4"
23.5 cm x 41.3 cm
n/a
Product Weight (each)
Shipping Weight
99.2 lbs (45 kg)
114.7 lbs (52 kg)
78 lbs (35.4 kg)
29.6 lbs (13.4 kg)
32.5 lbs (14.75 kg)
86.4 lbs (39.2 kg)
14
Polk Audio Customer Service: 1-800-377-7655 (Outside US & Canada: +1 410-358-3600) Monday-Friday, 9:00 AM-5:30 PM EST, polkcs@polkaudio.com
Specifications
Type
LSiM706c
center channel
LSiM704c
center channel
LSiM702f/x
surround
Tweeter
1" (25mm) enhanced
Ring Radiator
1" (25mm) enhanced
Ring Radiator
1" (25mm) enhanced
Ring Radiator
Midrange
Woofer
3 1/4" super cell
aerated polypropylene
3 1/4" super cell
aerated polypropylene
3 1/4" super cell
aerated polypropylene
6 1/2" super cell
5 1/4" super cell
6 1/2" super cell
aerated polypropylene
aerated polypropylene
aerated polypropylene
Frequency Response
(-3dB limits)
50 Hz - 30 kHz
70 Hz - 30 kHz
55 Hz - 30 kHz
Overall Frequency Response 30 Hz - 40 kHz
40 Hz - 40 kHz
20 W - 200 W
40 Hz - 40 kHz
20 W - 200 W
Steady State Recommended
Amp Power
20 W - 250 W
2.83V Sensitivity
Impedance
88 dB
88 dB
88 dB
compatible w/ 8 Ohm outputs
compatible w/ 8 Ohm outputs
compatible w/ 8 Ohm outputs
Orth Crossover
Tweeter/Midrange Crossover 2.8 kHz
2.5 kHz
2.4 kHz
Frequency
Midrange/Midbass Crossover 280 Hz
280 Hz
240 Hz
Frequency
Tweeter High Pass Slope
(acoustic)
18 dB/oct
18 dB/oct
12 dB/oct
6 dB/oct
18 dB/oct
18 dB/oct
12 dB/oct
12 dB/oct
18 dB/oct
18 dB/oct
12 dB/oct
12 dB/oct
Midrange Low Pass Slope
(acoustic)
Midrange High Pass Slope
(acoustic)
Midbass Low Pass Slope
(acoustic)
Midrange Enclosure Type
Woofer Enclosure Type
Dimensions W x H x D
sealed
sealed
sealed
dual PowerPort
28 3/4" x 9" x 13 13/16"
dual PowerPort
PowerPort
21 3/16" x 7 3/4" x 9 3/8"
53.8 cm x 19.7 cm x 23.8 cm
19 15/16" x 16 1/4" x 6 3/4"
50.6 cm x 41.3 cm x 17.1 cm
(greatest overall depth, grille) 73 cm x 22.9 cm x 35.1 cm
Product Weight (each)
Shipping Weight
42.3 lbs (19.2 kg)
46.3 lbs (21 kg)
27.8 lbs (12.6 kg)
29.1 lbs (13.2 kg)
28.9 lbs (13.1 kg)
62.1 lbs (28.18 kg)
Specifications, dimensions and features subject to change without notice. For more information call us at 1-800-377-7655
(USA and Canada). Outside of North America call +1 (410) 358-3600.
15
Limited Warranty
Polk Audio, Inc. warrants to the original purchaser only that this Polk Audio Loudspeaker
Product (the “Product”) will be free from defects in materials and workmanship for
a period of five (5) years from the date of original retail purchase from a Polk Audio
Authorized Dealer. However, this Warranty will automatically terminate prior to the
expiration of the five (5) years if the original retail purchaser sells or otherwise transfers
the Product to any other party. The original retail purchaser shall hereinafter be referred
to as “you.” To allow Polk Audio to offer the best possible warranty service, please
fill out the Product Registration Card(s) and send it to the Factory, at the address
provided on the Product Cards(s) within ten (10) days of the date of purchase.
Defective Products must be shipped, together with proof of purchase, prepaid insured
to the Polk Audio Authorized Dealer from whom you purchased the Product, or to the
Factory at 1 Viper Way, Vista, California 92081. Products must be shipped in the original
shipping container or its equivalent; in any case the risk of loss or damage in transit is
to be borne by you. If upon examination at the Factory or Polk Audio Authorized Dealer
it is determined that the unit was defective in materials or workmanship at any time
during this Warranty period, Polk Audio or the Polk Audio Authorized Dealer will, at its
option, repair or replace this Product at no additional charge, except as set forth below.
All replaced parts and Products become the property of Polk Audio. Products replaced
or repaired under this warranty will be returned to you, within a reasonable time,
freight prepaid.
This warranty does not include service or parts to repair damage caused by accident,
disaster, misuse, abuse, negligence, inadequate packing or shipping procedures,
commercial use, voltage inputs in excess of the rated maximum of the unit, cosmetic
appearance of cabinetry not directly attributable to defect in materials or workman-
ship, or service, repair, or modification of the Product which has not been authorized
or approved by Polk Audio. This warranty shall terminate if the Serial number on the
Product has been removed, tampered with or defaced. This warranty is in lieu of all
other expressed Warranties. If this Product is defective in materials or workmanship
as warranted above, your sole remedy shall be repair or replacement as provided
above. In no event will Polk Audio, Inc. be liable to you for any incidental or conse-
quential damages arising out of the use or inability to use the Product, even if
Polk Audio, Inc. or a Polk Audio Authorized Dealer has been advised of the possibility
of such damages, or for any claim by any other party. Some states do not allow the
exclusion or limitation of consequential damages, so the above limitation and exclusion
may not apply to you. All implied warranties on this Product are limited to the duration
of this expressed Warranty. Some states do not allow limitation on how long an implied
Warranty lasts, so the above limitations may not apply to you. This Warranty gives you
specific legal rights, and you also may have other rights which vary from state to state.
This Warranty applies only to Products purchased in the United States of America,
its possessions, and U.S. and NATO armed forces exchanges and audio clubs. The
Warranty terms and conditions applicable to Products purchased in other countries
are available from the Polk Audio Authorized Distributors in such countries.
16
Polk Audio Customer Service: 1-800-377-7655 (Outside US & Canada: +1 410-358-3600) Monday-Friday, 9:00 AM-5:30 PM EST, polkcs@polkaudio.com
18
Polk Audio Customer Service: 1-800-377-7655 (Outside US & Canada: +1 410-358-3600) Monday-Friday, 9:00 AM-5:30 PM EST, polkcs@polkaudio.com
LSiM series manual
For recommended accessories (speaker stands,
brackets and exclusive Polk Audio logowear),
HBP2356
POLK AUDIO, INC. • 5601 METRO DRIVE,
BALTIMORE, MD 21215 USA • 800.377.7655
FAX: 410.764.5266 • WWW.POLKAUDIO.COM
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