LG SL4F Manual
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OWNER’S MANUAL
Wireless
Sound Bar
1905_Rev02
www.lg.com
Copyright © 2019 LG Electronics Inc. All Rights Reserved.
Please read this manual carefully before operating your set and retain it for future
reference.
MODEL
SL4F (SL4F, SPH4B-W)

Getting Started2
Getting Started
1
Safety Information
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION: TO REDUCE THE RISK OF ELECTRIC
SHOCK DO NOT REMOVE COVER (OR BACK)
NO USER-SERVICEABLE PARTS INSIDE REFER
SERVICING TO QUALIFIED SERVICE PERSONNEL.
This lightning ash with arrowhead
symbol within an equilateral triangle
is intended to alert the user to the
presence of uninsulated dangerous
voltage within the product’s
enclosure that may be of sufcient magnitude to
constitute a risk of electric shock to persons.
The exclamation point within an
equilateral triangle is intended
to alert the user to the presence
of important operating and
maintenance (servicing) instructions
in the literature accompanying the product.
WARNING: TO PREVENT FIRE OR ELECTRIC SHOCK
HAZARD, DO NOT EXPOSE THIS PRODUCT TO RAIN
OR MOISTURE.
WARNING: Do not install this equipment in a
conned space such as a book case or similar unit.
CAUTION: Do not use high voltage products around
this product. (ex. Electrical swatter) This product may
malfunction due to electrical shock.
CAUTION: The apparatus should not be exposed to
water (dripping or splashing) and no objects lled
with liquids, such as vases, should be placed on the
apparatus.
CAUTION: Do not block any ventilation openings.
Install in accordance with the manufacturer’s
instructions.
Slots and openings in the cabinet are provided
for ventilation and to ensure reliable operation of
the product and to protect it from over heating.
The openings should never be blocked by placing
the product on a bed, sofa, rug or other similar
surface. This product shall not be placed in a built-
in installation such as a bookcase or rack unless
proper ventilation is provided or the manufacturer’s
instruction has been adhered to.
CAUTION: No naked ame sources, such as lighted
candles, should be placed on the apparatus.
NOTICE: For safety marking information including
product identication and supply ratings, please refer
to the main label on the bottom or the other surface
of the product.
CAUTION concerning the Power Cord
The Power Plug is the disconnecting device. In case
of an emergency, the Power Plug must remain readily
accessible.
Check the specication page of this owner’s manual
to be certain of the current requirements.
Do not overload wall outlets. Overloaded wall outlets,
loose or damaged wall outlets, extension cords, frayed
power cords, or damaged or cracked wire insulation
are dangerous. Any of these conditions could result
in electric shock or re. Periodically examine the
cord of your device, and if its appearance indicates
damage or deterioration, unplug it, discontinue use of
the device, and have the cord replaced with an exact
replacement part by an authorized service center.
Protect the power cord from physical or mechanical
abuse, such as being twisted, kinked, pinched, closed
in a door, or walked upon. Pay particular attention to
plugs, wall outlets, and the point where the cord exits
the device.

Table of Contents4
2 Connecting
15 Organizing cables (Optional)
15 Connecting the AC Adapter
16 Wireless subwoofer connection
18 Connecting to your TV
18 – Using an OPTICAL cable
18 – LG Sound Sync
20 Optional equipment connection
20 – OPTICAL IN connection
20 – Antenna Connection
21 – USB connection
21 – Compatible USB devices
21 – USB device requirement
22 – Playable file
Table of Contents
1 Getting Started
2 Safety Information
6 Introduction
7 Front panel
8 Rear panel
9 Remote control
12 Installing the sound bar
13 Mounting the main unit on a wall

Getting Started 7
Getting Started
1
Front panel
A
Display Window
-Display window will be darkened automatically if there is no key input for 15 seconds.
When you press any button, the display window will brighten.
BRemote sensor
C
1 (Standby)
-Switches the unit ON or OFF.
F (Function)
-Select the function and input source by pressing F repeatedly.
Input source / Function Display
Optical
LG Sound Sync (Wired) OPT
Bluetooth BT
LG Sound Sync (Wireless) LG TV
Radio FM
USB USB
o p/ (Volume)
-Adjusts volume level.
, This unit will turn itself off to save electric consumption when the main unit is not connected to an external
device and is not used for 15 minutes.

Getting Started8
Getting Started
1
Rear panel
ADC IN
-Connect to the AC adapter.
BOPTICAL IN
-Connect the OPTICAL IN jack on the back of the unit to OPTICAL OUT jack on the TV.
CFM ANTENNA
-Connect to radio antenna.
DUSB Port
-Connect USB memory device to the USB port on the back of the unit.

Getting Started 9
Getting Started
1
Remote control
Replacement of Battery
Remove the battery cover on the rear of the remote
control, and insert the battery with 4 and 5
matched correctly.
a1 (Standby)
-Switches the unit ON or OFF.
bVOL (Volume) o/p
-Adjusts speaker volume.
c
C/V (Skip/Search)
-Press C or V to go to next or previous le.
-Press and hold C or V during playback and release it at the point you want.
-Select the radio stations by using C or V.
d
N (Play/Pause)
-Starts playback. / Pauses playback.
yBT (Bluetooth) connection Lock: It allows you to connect a Bluetooth device only on Bluetooth
and LG TV functions. (Page 29)
To turn on or off the connection lock, press and hold Bluetooth N for about 3 seconds and press it
again in BT (Bluetooth) function.
-Stores programme of Radio.

Getting Started10
Getting Started
1
e
SOUND EFFECT
- Selects a sound effect mode by using SOUND EFFECT.
On Display Description
ASC (Adaptive Sound Control) Analyzes the property of the input sound and provides the
sound optimized for the content in real time.
BASS BLAST or BASS BLAST+ Reinforces the bass and powerful sound.
STANDARD You can enjoy optimized sound.
CINEMA You can enjoy more immersive and cinematic surround sound.
yTV remote: It allows you to control the volume of this unit by your TV remote control even by other
company’s product. (Page 24)
To turn on or off the TV Remote function, press and hold for about 3 seconds and SOUND EFFECT
press it again.
, Supported TV brands
LG Panasonic Samsung Sony Toshiba VizioPhilips Sharp
f
(Sound tuning)
- Adjusts sound level of each speaker.
Select the speaker you want to adjust by using and adjust the sound level by using VOL
o/p.
Speaker Display Range
Sub Woofer -15 ~ 6WF
Treble TRE -5 ~ 5
Bass BAS -5 ~ 5
g
8 (Night time)
- It is useful when you want to watch movies at low volume late at night. It makes to reduce the
sound intensity and improve neness and softness.
Press 8 to activate Night time mode. To cancel it, press
8 again.
hPRESET DELETE
- Deletes the saved radio stations.

Getting Started 11
Getting Started
1
iF (Function)
- Select the function and input source by pressing F repeatedly.
j[ (Mute)
- Press [ to mute your unit. To cancel it, press
[ again.
k
J (Information)
- You can display various information of the input source by pressing
J.
- OPT (Optical): Audio format
- BT (Bluetooth Bluetooth): Connected device name
- USB: File information contained on a USB.
yAuto Power ON/OFF: It allows the unit to turn on and off automatically by input signals: Optical, LG
TV or (Page 25)Bluetooth
To turn on or off AUTO POWER function, press and hold
J for about 3 seconds and press it again.
lREPEAT
- Press REPEAT to select desired repeat or random mode.
m
FOLDER/PRESET
W/S
- Searches a folder on USB device.
- Selects programme of Radio.
n*
- This button is not available.

Getting Started12
Getting Started
1
Installing the sound bar
You can hear the sound by connecting the unit to the
other device: TV, Blu-ray disc player, DVD player, etc.
Place the unit in front of the TV and connect it to the
device you want. (Pages 18 - 21)
You can place the wireless subwoofer anywhere in
your room. But it is better to place the subwoofer
near the main unit. Turn it slightly toward the center
of the room to reduce the wall reections.
If the sound bar covers the remote sensor of the
TV, please separate distance between the sound
bar and TV by 10 ~ 15 cm or more.
, Note
yFor best performance of wireless connection
such as or wireless subwoofer, Bluetooth
do not install the unit on Metallic furniture
because wireless connection communicates
through a module positioned on the bottom
of the unit.
yBe careful not to make scratches on the
surface of the Unit /Subwoofer when
installing or moving them.
> Caution
Installing the additional foot
You can extend the height of the unit by using
additional foot (height: 14 mm)
1. Turn the unit upside down.
2. Peel off a sticker attached to the additional foot.
Then place it on the existing foot of the unit.
3. Press the additional foot with adequate force to
get it firmly fixed.

Getting Started 13
Getting Started
1
Mounting the main unit
on a wall
You can mount the main unit on a wall.
Because it is difcult to make a connection after
installing this unit, you should connect the cables
before installation.
> Caution
Preparation materials
Unit
Wall bracket install guide
Screws
Screws (A)
Wall plug
Wall bracket
(Not supplied)
1. Match the TV’s BOTTOM EDGE of Wall bracket
install guide with the bottom of TV and attach to
the position.
2. When you mount it on a wall (concrete), use the
wall plugs. You should drill some holes. A guide
sheet (Wall bracket install guide) is supplied to
drill. Use the sheet to check the point to drill.
3. Remove the Wall bracket install guide.
4. Fix the brackets with screws ( ) as shown in the A
illustration below.
Screws ( ) and Wall Plugs are not supplied for A
mounting the unit. We recommend the Hilti
(HUD-1 6 x 30) for the mounting.
, Note

Connecting14
Connecting
2
5. Put the unit on the brackets to match screw
holes on the bottom of the unit.
6. Fix the unit with the screws firmly.
To detach the unit, perform it in reverse order.
, Note
yDo not install this unit upside down. It can
damage the parts of this unit or be the cause
of personal injury.
yDo not hang onto the installed unit and avoid
any impact to the unit.
ySecure the unit rmly to the wall so that it
does not fall off. If the unit falls off, it may
result in an injury or damage to the product.
yWhen the unit is installed on a wall, please
make sure that a child does not pull any of
connecting cables, as it may cause it to fall.
> Caution

Connecting 15
Connecting
2
Organizing cables
(Optional)
You can organize the cable with cable ties.
1. Hold the cables together with cable ties as shown
below.
2. Tighten cable ties.
yAfter all connections are completed, you can
arrange cables as needed.
yCable ties are not supported.
, Note
Connecting the AC
Adapter
Connect the speaker to the power supply with the
supplied AC adapter.
1. Connect the supplied AC power cord to the AC
adapter.
2. Connect the AC adapter cable to DC IN adapter
input.
3. Plug the AC power cord into an AC outlet.
Only use the AC adapter supplied with this
device. Do not use a power supply from another
device or manufacturer. Using any other power
cable or power supply may cause damage to the
device and void your warranty.
> Caution

Connecting 17
Connecting
2
yIt takes a few seconds (and may take longer)
for the main unit and the subwoofer to
communicate with each other and make
sounds.
yThe closer the main unit and the subwoofer,
the better sound quality. It is recommended
to install the main unit and the subwoofer as
close as possible and avoid the cases below.
-There is an obstacle between the main unit
and the subwoofer.
-There is a device using same frequency
with this wireless connection such as
a medical equipment, a microwave or a
wireless LAN device.
-Keep the sound bar and the subwoofer
away from the device (ex. wireless router,
microwave oven, etc.) over 1 m to prevent
wireless interference.
!
1 m
, Note

Connecting18
Connecting
2
Connecting to your TV
Using an OPTICAL cable
1. Connect the OPTICAL IN jack on the back of the
unit to OPTICAL OUT jack on the TV using an
OPTICAL cable.
Optical
cable
2. Select the input source to OPT by pressing F
repeatedly.
You can see “OPT” on the display window if
connecting normally between this unit and your
TV.
yBefore connecting the optical cable, be sure
to remove the protection plug cover if your
cable has the cover.
yYou can enjoy the TV audio through the
speakers of this unit. In the case of some TV
models, you must select the external speaker
option from the TV menu. (For details,
reference your TV user manual.)
ySet up the sound output of TV to listen to
the sound through this unit:
TV setting menu
[ [Sound] [ [TV Sound
output]
[ [External speaker (Optical)]
yDetails of TV setting menu vary depending
on the manufacturers or models of your TV.
, Note
LG Sound Sync
You can control some functions of this unit by
your TV’s remote control with LG Sound Sync. It is
compatible with the LG TV that is supported LG
Sound Sync. Make sure of the LG Sound Sync logo on
your TV.
Controllable function by LG TV’s remote control:
Volume up/down, mute
Refer to the TV’s instruction manual for the details of
LG Sound Sync.
Make one of the following connections, depending on
the capabilities of your equipment.
yYou can also use the remote control of this
unit while using LG Sound Sync. If you use TV’s
remote control again, the unit synchronizes
with the TV.
According to TV Specications, the volume
and mute of this unit synchronize with TV.
yWhen the connection fails, make sure of the
condition of the TV and power.
yMake sure of the condition of this unit and
the connection in the cases below when using
LG Sound Sync.
-The unit is turned off.
-Changing the function to the others.
-Disconnecting the optical cable.
-Disconnecting the wireless connection
caused by interference or a distance.
yThe amount of time to turn off this unit is
different depending on your TV when you set
AUTO POWER function to ON.
yDetails of TV setting menu vary depending on
the models of your TV.
, Note

Connecting 19
Connecting
2
LG Sound Sync with wired connection
1. Connect your LG TV to the unit by using an
optical cable.
Optical
cable
2. Set up the sound output of TV to listen to the
sound through this unit:
TV setting menu [ [Sound] [ [TV Sound
output] [ [LG Sound Sync (Optical)]
3. Turn on the unit by pressing 1.
4. Select the input source to OPT by pressing F
repeatedly.
You can see “LGOPT” on the display window if
connecting normally between this unit and your
TV.
Details of TV setting menu vary depending on
the models of your TV.
, Note
LG Sound Sync with wireless
connection
1. Turn on the unit by pressing 1.
2. Select the LG TV function by pressing F
repeatedly.
3. Set up the sound output of TV to listen to the
sound through this unit:
TV setting menu [ [Sound] [ [TV Sound
output] [ [LG Sound Sync (Wireless)]
“PAIRED” appears on the display window for
about 3 seconds and then you can see “LG TV”
on the display window if connecting normally
between this unit and your TV.
If you turned off the unit directly by pressing
1 (Power), LG Sound Sync (Wireless) will be
disconnected.
, Note

Connecting20
Connecting
2
Optional equipment
connection
OPTICAL IN connection
Connect an optical output jack of external devices to
the OPTICAL IN jack.
Optical cable
To the optical output
jack of external device
1. Connect the OPTICAL IN jack on the back of the
unit to optical out jack of your external device.
2. Select the input source to OPT by pressing F
repeatedly.
You can see “OPT” on the display window if
connecting normally between this unit and your
device.
Before connecting the optical cable, be sure to
remove the protection plug cover if your cable
has the cover.
, Note
Antenna Connection
Connect the supplied antenna for listening to the
radio.
yAfter connecting the FM wire antenna, be
sure to fully extend it.
yIf the radio is not picking up well or the noise
is excessive even though you are adjusting
the FM antenna, you can install the radio
app on your smartphone and connect it with
Bluetooth to listen to the clear radio.
, Note

Connecting 21
Connecting
2
USB connection
Connect USB memory device to the USB port on the
back of the unit.
For more information of playing les on a USB, refer
to the page 23.
Removing the USB Device from the unit.
1.
Choose a different function/mode.
2. Remove the USB device from the unit.
Compatible USB devices
yMP3 Player: Flash type MP3 player.
yUSB Flash Drive: Devices that support USB 1.1.
yThe USB function of this unit does not support
some USB devices.
USB device requirement
yDevices which require additional program
installation connected to a computer, are not
supported.
yDo not extract the USB device while in operation.
yFor a large capacity USB, it may take longer than a
few minutes to be searched.
yTo prevent data loss, back up all data.
yThis unit is not supported when the total number
of les is 999 or more.
yThe unit’s USB Port cannot be connected to PC.
The unit can not be used as a storage device.
yFAT16/FAT32 le system is supported on this unit.
yDepending on some devices, it may not available to
recognize the followings on this unit.
-External HDD
-Card readers
-Locked devices
-Hard type USB devices
-USB hub
-Using USB extension cable
-iPhone/iPod/iPad
-Android device

Connecting22
Connecting
2
Playable file
Sampling Frequency
MP3: within 32 to 48 kHz
WMA: within 32 to 48 kHz
Bitrate resolution
MP3: within 80 to 320 kbps
WMA: within 56 to 128 kbps
yMaximum les: Under 999
yMaximum directories: Under 99
yA protected le by DRM (Digital rights
management) cannot be played on the unit.
yVideo les in the USB storage device can not be
played.
yDepending on the performance of your USB
device, playback may not work well.
yFolders and les on the USB are recognized
as below.
A
: File
: Folder
B
C
D
E
F
G
H
I
J
a
c
b
d
yIf there is no le in a folder, the folder will not
appear.
yFile will be played from le
$A to le $J
one by one.
yFiles will be played in order recorded and it
may be different depending on the record
circumstances.
yThis unit can display le or folder names that
contain numbers or English characters only.
y*ROOT: The rst screen you can see when a
this unit recognize the USB is “ROOT”.
, Note

Operating 23
Operating
3
Basic operations
USB operation
1. Connect the USB device to the USB port.
2. Select the USB function by pressing F repeatedly.
To Do this
Playback Press N on the remote
control.
Pause During playback, press N on
the remote control.
Skip to the next/
previous le
During playback, press V on
the remote control to go to the
next le.
Playing less than 3 seconds,
press C on the remote
control to go to the previous
le.
Playing after 3 seconds, press
C on the remote control to
go to the beginning of the le.
Search for a
section within a
le
Press and hold C V/ on the
remote control during playback
and release it at the point you
want to listen to.
Play repeatedly
or randomly
Press REPEAT on the remote
control repeatedly. Refer to
the note for details about the
display change.
Search a folder Press
FOLDER/PRESET
W/S
on the remote control.
Resume
playback
This unit memorizes a current
song which is played before
changing the function or
turning off the unit.
yThe resume point may be cleared when you
pull out the power cord or removing the USB
device from the unit.
yRepeat/Random playback operates as follows.
To Do this
OFF Plays songs on USB device
in order.
ONE Plays a same song
repeatedly.
FOLDER Plays songs in a folder
repeatedly.
ALL Plays all the songs on USB
device repeatedly.
SHUFFLE Plays all the songs once
randomly, and stops the
playback.
, Note

Operating24
Operating
3
Other operations
Using your TV remote control
You can control some functions of this unit by your
TV remote control even by other company’s product.
Controllable functions are volume up/down and
mute.
Press and hold SOUND EFFECT on the remote
control for about 3 seconds. “ON - TV REMOTE”
appears and you can control this unit by your TV
remote control.
To check the status of this function, press and hold
SOUND EFFECT on the remote control.
To turn off this function, press and hold SOUND
EFFECT on the remote control and press it once
again while “ON - TV REMOTE” is scrolled.
yMake sure that the sound output of your TV
is set to [External speaker].
yThis function does not operate on LG TV’s
magic remote control.
ySome remote control may not be supported.
, Note

Operating 25
Operating
3
AUTO POWER On/Off
This unit automatically turns on by an input source:
Optical, LG TV or Bluetooth.
When you turn on your TV or an external device
connected to this unit, this unit recognizes the input
signal and selects the suitable function. You can hear
the sound from your device.
If you try to connect your Bluetooth device, this
unit turns on and the unit will be connected to your
Bluetooth device.
To turn on this function, press and hold
J on the
remote control for about 3 seconds and press it once
again while “OFF - AUTO POWER” is scrolled.
To check the status of this function, press and hold
J on the remote control.
To turn off this function, press and hold
J on the
remote control for about 3 seconds and press it once
again while “ON - AUTO POWER” is scrolled.
yAfter the unit is turned on by AUTO POWER
function, it will be automatically turned off if
there is no signal for a certain period of time
from the TV connected by LG Sound Sync
(Optical/Wireless).
yAfter the unit is turned on by AUTO POWER
function, it will be automatically turned off if
there is no signal for a certain period of time
from the external device.
yIf you turned off the unit directly, it cannot
be turned on automatically by AUTO POWER
function. However the unit can be turned on
by AUTO POWER function when optical signal
comes in after 5 seconds of no signal.
yDepending on the connected device, this
function may not operate.
yIf you disconnect Bluetooth connection by
this unit, some devices try to Bluetooth
connect to the unit continually. Therefore it is
recommended to disconnect the connection
before turning off the unit.
yWhen you turn on this unit for the rst time,
status of Auto Power function is turned on.
yTo use this function, the main unit must be
registered in paired devices list of Bluetooth
device.
yYou can set the AUTO POWER function only
when this unit is turned on.
, Note

Operating26
Operating
3
Auto function change
This unit recognizes input signals such as Optical,
Bluetooth and LG TV and then changes suitable
function automatically.
When optical signal comes in
When you turn on the external device connected to
this unit by an optical cable, this unit changes the
function to optical. You can hear the sound from your
device.
When you try to connect BLUETOOTH
device
When you try to connect your device to Bluetooth
this unit, function is selected. Play your Bluetooth
music on the Bluetooth device.
When LG TV signal comes in
When you turn on your LG TV connected by LG
Sound Sync (Wireless connection), this unit changes
the function to LG TV. You can hear the sound from
your TV.
If the connection lock function is set, Bluetooth
Bluetooth connection will be only available on
Bluetooth and LG TV function. (Page 29)
, Note

Operating 27
Operating
3
Using a Bluetooth
Wireless Technology
About Bluetooth
Bluetooth is wireless communication technology for
short range connection.
The sound may be interrupted when the connection
interfered by the other electronic wave or you
connect the Bluetooth in the other rooms.
Connecting individual devices under Bluetooth
wireless technology does not incur any charges. A
mobile phone with wireless technology Bluetooth
can be operated via the Cascade if the connection
was made via wireless technology.Bluetooth
yAvailable Devices: Smart phone, MP3, Notebook,
etc.
yVersion: 4.0
yCodec: SBC
Bluetooth profiles
In order to use wireless technology, Bluetooth
devices must be able to interpret certain proles. This
speaker is compatible with following prole.
A2DP (Advanced Audio Distribution Prole)
Listening to Music of a
Bluetooth Device
Before you start the pairing procedure, make sure
that the Bluetooth feature on your smart device
is turned on. Refer to your device’s user Bluetooth
guide. Once a pairing operation is performed, it does
not need to be performed again.
1. Select the Bluetooth function by pressing F
repeatedly.
Appears “BT” and then “READY” in display
window.
2. Operate the Bluetooth device and perform
the pairing operation. When searching for this
speaker on your device, a list of the Bluetooth
devices found may appear in the Bluetooth
device display depending on the type of
Bluetooth device.
Your speaker appears as “LG SL4F(XX)”
3. Select the “LG SL4F(XX)”.
yXX means the last four digits of address.
For example, if your unit has a MAC
address such as 9C:02:98:4A:F7: , you 08
will see “LG SL4F(08)” on your Bluetooth
device.
yDepending on the Bluetooth device type,
some devices have a different pairing way.
For details about pairing, refer Bluetooth
to your device manual.Bluetooth
, Note

Operating28
Operating
3
4. When this unit is successfully connected with
your Bluetooth device,
“PAIRED” [ your device’s name [ “BT” appears
on the display window.
yIf it is unavailable to display device name
on the unit, “-” will be displayed.
yTo check the connected device’s name,
press J on the remote control. The
connected Bluetooth device’s name is
displayed.
, Note
5. Listen to music.
To play music in your device, refer to Bluetooth
your device’s user guide.Bluetooth
yWhen using technology, you have Bluetooth
to make a connection between the unit and
the Bluetooth device as close as possible and
keep the distance.
However it may not work well in the case
below:
-There is an obstacle between the unit and
the device.Bluetooth
-There is a device using same frequency
with technology such as a Bluetooth
medical equipment, a microwave or a
wireless LAN device.
, Note
yIf connection does not work well, Bluetooth
try pairing it again.
yThe sound may be interrupted when the
connection has interference by the other
electronic waves.
yPairing is limited to one Bluetooth device per
unit and multi-pairing is not supported.
yDepending on the type of the device, you may
not be able to use the Bluetooth function.
yYou can enjoy Bluetooth function using
smart phone, MP3, Notebook, etc..
yThe more distance between the unit and the
Bluetooth device, the lower the sound quality
becomes.
yBluetooth connection will be disconnected
when the unit is turned off or the Bluetooth
device gets far from the unit.
yWhen Bluetooth connection is disconnected,
connect the Bluetooth device to the unit
again.
yWhen the unit is not connected, “READY”
appears in the display window.
yWhen you connect Bluetooth device (iOS
device etc.) to this unit or operate the device,
the volume level can be synchronized with
each other.
yIf you change to another function after
connecting Bluetooth Bluetooth, connection
will be disconnected. And you return to
Bluetooth Bluetooth function, connection
will be connected automatically.
, Note

Operating 29
Operating
3
Controls connected Bluetooth
device
You can control the connected Bluetooth device
from the unit; play, pause, skip, volume.
yOnly Android OS and iOS is available to use
this function.
yThis function may not be supported
depending on the device or some Bluetooth
of TV operated differently.
, Note
Bluetooth connection lock (BT
LOCK)
You can limit connection to only Bluetooth
BT (Bluetooth) and LG TV function to prevent
unintended connection.Bluetooth
To turn on this function, press and hold N on
the remote control for about 3 seconds in BT
(Bluetooth) function and press it once again while
“OFF - BT LOCK” is scrolled. Then you can limit
Bluetooth connection.
To turn off this function, press and hold N on
the remote control for about 3 seconds in BT
(Bluetooth) function and press it once again while
“ON - BT LOCK” is scrolled.
Even if you set up BT LOCK function to On, this
sound bar turns on by Auto Power function. Turn
off Auto Power function to prevent it. (Page
25)
, Note
Using BLUETOOTH App
yOnly Android OS is available to use “Music
Flow ” app with this unit.Bluetooth
yAdditional data charges may occur if installed
over 3G/4G, according to your device plan.
, Note
About “Music Flow Bluetooth” App
“Music Flow ” app brings a suite of new Bluetooth
features to this unit.
To enjoy more features, you are recommended to
download and install free “Music Flow Bluetooth”
app.
Install “Music Flow Bluetooth”
App onto Your BLUETOOTH
Device
There are two ways to install “Music Flow Bluetooth”
app onto your Bluetooth device.
Install “Music Flow Bluetooth” App
through QR code
1. Install “Music Flow ” app through QR Bluetooth
code. Use the scanning software to scan the QR
code.
2. Tap an icon for installation.
yMake sure that your Bluetooth device is
connected to the Internet.
yMake sure that your Bluetooth device
has a scanning software application. If you
don’t have one, download one from “Google
Android Market (Google Play Store)”.
yDepending on area, QR code may not work.
yYou can nd the available application of this
unit by using “LG Audio” app. Android OS: Ver
5.0 (or later)
, Note

Operating30
Operating
3
Install “Music Flow Bluetooth” App
through “Google Android Market
(Google Play Store)”
1. Tap the “Google Android Market (Google Play
Store)” icon.
2. In the search bar, type in the “Music Flow
Bluetooth” and search it.
3. In the search result list, find and tap “Music Flow
Bluetooth Bluetooth” to start downloading app.
4. Tap an icon for installation.
yMake sure that your Bluetooth device is
connected to the Internet.
yMake sure that your Bluetooth device is
equipped with “Google Android Market
(Google Play Store)”.
, Note
Activate BLUETOOTH with
“Music Flow Bluetooth” App
“Music Flow ” app helps to connect your Bluetooth
Bluetooth device to this unit.
1. Tap “Music Flow Bluetooth” app icon on the
home screen to open “Music Flow Bluetooth”
app, and go to the main menu.
2. If you want to get more information to operate,
tap [Setting] and tap [Help] menu.
y“Music Flow ” app will be available Bluetooth
in the software version as follow;
-Android O/S: Ver 4.0.3 (or later)
yIf you use “Music Flow ” app for Bluetooth
operation, there would be some differences
between “Music Flow ” app and Bluetooth
the supplied remote control. Use the supplied
remote control as necessary.
yDepending on the device, “Music Bluetooth
Flow ” app may not work.Bluetooth
yAfter connection of “Music Flow Bluetooth”
app, music may be output from your device. In
this case, try connecting procedure again.
yIf you operate the other applications or
change the settings on your Bluetooth device
while using “Music Flow ” app, Bluetooth
“Music Flow ” app may operate Bluetooth
abnormally.
yWhen “Music Flow ” app operates Bluetooth
abnormally, check your Bluetooth device and
the connection of “Music Flow Bluetooth”
app and then try to connect again.
yDepending on the smart phone's operating
system, you have some differences for “Music
Flow ” operation.Bluetooth
yEven though connection will Bluetooth
be disconnected, you can use “Music Flow
Bluetooth” app when you change the
function.
yAdditional features offered by "Music Flow
Bluetooth" app may not work depending on
the distance between this unit and Bluetooth
device and wireless conditions.
, Note

Operating 31
Operating
3
Radio Operations
Be sure that FM antenna is connected. (Page 20)
Listening to the radio
1. Press F on the remote control until FM appears in
the display window.
The last received station is tuned in.
2. Auto tuning:
Press and hold C/V on the remote control
until the frequency indication starts to change,
then release. Scanning stops when the unit tunes
in a station.
Or
Manual tuning:
press C/V on the remote control repeatedly.
3. Adjust the volume by pressing VOL o/p on the
remote control or pressing o/p on the unit.
Presetting the Radio Stations
You can preset 10 stations for FM. Before tuning,
make sure to turn down the volume.
1. Press F until the FM appears in the display
window.
2. Select the desired frequency by pressing C/V
on the remote control.
3. Press N on the remote control.
A preset number will blink in the display window.
4. Press FOLDER/PRESET W/S on the remote
control to select the preset number you want.
5. Press N on the remote control once again. The
station is stored.
6. Repeat the steps 2 to 5 to store other stations.
7. To listen a preset station, press FOLDER/PRESET
W/Son the remote control.
Deleting a saved station
1. Press FOLDER/PRESET W/S on the remote
control to select a preset number you want to
delete.
2. Press on the remote control, PRESET DELETE
“DEL P(number)?” will appear in the display
window.
3. Press on the remote control PRESET DELETE
again to delete the selected preset number.
Deleting all the saved stations
1. Press and hold on the remote PRESET DELETE
control. “DEL ALL?” will flash up on the unit
display.
2. on the remote control to Press PRESET DELETE
erase all the saved radio stations. “DELETED ALL”
will flash up on the unit display.

Troubleshooting32
Troubleshooting
4
Troubleshooting
General
Symptoms Cause & Solution
The unit does not work
properly.
yTurn off the power of this unit and the connected external device (TV, Woofer,
DVD-player, Amplier, etc.) and turn them on again.
yDisconnect the power cord of this unit and the connected external device (TV,
Woofer, DVD-player, Amplier, etc.) and then try connecting again.
yPrevious setting may not be saved when device power is shut off.
No Power
yThe power cord is unplugged.
Plug in the power cord.
yCheck whether electricity failed.
Check the condition by operating other electronic devices.
No sound
yIncorrect input source is selected.
Check the input source and select the correct input source.
yThe mute function is activated.
Press [ (Mute) adjust the volume level to cancel the mute function.
yWhen you are using connection with a external device (set top box, Bluetooth
device etc.), adjust volume level of the device.
No woofer sound
yThe power cord of the subwoofer is not connected.
Plug the power cord into the wall outlet securely.
yPairing between the unit and the subwoofer gets disconnected.
Connect the unit and the subwoofer. (Page 16)
The remote control does
not work properly.
yThe remote control is too far from the unit.
Operate the remote control within about 7 m.
yThere is an obstacle in the path of the remote control and the unit.
Remove the obstacle.
yThe batteries in the remote control is exhausted.
Replace the batteries with new one.
The AUTO POWER function
does not work.
yCheck connection of the external device such as TV, DVD/Blu-Ray player or
Bluetooth device.
yDepending on the connected device, this function may not operate.
LG Sound Sync does not
work.
yCheck whether your LG TV supports LG Sound Sync.
yCheck connection of LG Sound Sync (Optical or wireless).
yCheck sound setting of your TV and this unit.

Troubleshooting 33
Troubleshooting
4
Symptoms Cause & Solution
The unit does not connect
with Bluetooth device
yTurn off the connection lock function. (Page 29)Bluetooth
When you feel the output
sound of the unit is low.
Check the details below and adjust the unit according to them.
yWith the sound bar connected with TV, change the AUDIO DIGITAL OUT
setting on TV Setup Menu from [PCM] to [AUTO] or [BITSTREAM].
yWith the sound bar connected with Player, change the AUDIO DIGITAL OUT
setting on Player Setup Menu from [PCM] to [PRIMARY PASS-THROUGH] or
[BITSTREAM].
yChange Audio DRC setting on connected device setup menu to [OFF] state.
yMake sure Night time mode is not On. Turn [OFF] Night time mode.
Radio stations cannot be
tuned in properly
yThe antenna is positioned or connected poorly.
Connect the antenna securely.
yThe signal strength of the radio station is too weak.
Tune to the station manually.
yNo stations have been preset or preset stations have been cleared (when
tuning by scanning preset channels).
Preset some radio stations, see page 31 for details.
NOTES to use wireless
Symptoms Cause & Solution
This device may have
wireless interference.
yWireless may not operate normally in weak signal area.
yPlease install the device close enough to wireless subwoofer.
yDo not install the device on metal furniture for optimum performance.
Bluetooth device may
malfunction or make
noise in the following
cases.
yWhen any part of your body contact the transceiver of the Bluetooth device
or sound bar.
yWhen there is an obstacle or wall or the device is installed in a secluded spot.
yWhen there is a device (a wireless LAN, a medical equipment or a microwave)
using same frequency, make the distance between the products as far away
as possible each other.
yWhen connecting the device to the device, make the distance Bluetooth
between the products as close as possible each other.
yWhen the device gets too far from the device, the connection is Bluetooth
disconnected and also malfunction may occur.

Appendix34
Appendix
5
Trademarks and licenses
All other trademarks are trademarks of their
respective owners.
Manufactured under license from Dolby
Laboratories. Dolby, Dolby Audio, and the double-D
symbol are trademarks of Dolby Laboratories.
For DTS patents, see http://patents.dts.com.
Manufactured under license from DTS Licensing
Limited. DTS, the Symbol, DTS and the Symbol
together, and Digital Surround are registered
trademarks and/or trademarks of DTS, Inc. in the
United States and/or other countries. © DTS, Inc.
All Rights Reserved.
The Bluetooth® word mark and logos are
registered trademarks owned by the Bluetooth
SIG, Inc. and any use of such marks by LG
Electronics is under license.
Other trademarks and trade names are those of
their respective owners.

Appendix 35
Appendix
5
Specifications
General
Power consumption Refer to the main label on the unit.
AC adapter
yModel: DA-38A25
yManufacturer: Asian Power Devices Inc.
yInput: 100 - 240 V ~ 50 - 60 Hz
yOutput: 25 V 0 1.52 A
Dimensions (W x H x D) Approx. 890.0 mm X 57.0 mm X 85.0 mm With foot
Operating temperature 5 °C to 35 °C
Operating humidity 5 % to 90 %
Bus Power Supply (USB) 5 V 0 500 mA
Available Digital Input Audio
Sampling Frequency 32 kHz, 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz
Available Digital Input Audio format Dolby Audio, DTS Digital Surround, PCM
Input/Output
OPTICAL IN 3 V (p-p), Optical jack x 1
Tuner
FM Tuning Range 87.5 to 108.0 MHz or 87.50 to 108.00 MHz
Amplier (RMS Output)
Total 300 W RMS
Front 50 W RMS x 2 (4 Ω at 1 kHz, THD 10 %)
Subwoofer 200 W RMS (3 Ω at 80 Hz, THD 10 %)

Appendix36
Appendix
5
Wireless subwoofer
Power requirements Refer to the main label on the subwoofer.
Power consumption Refer to the main label on the subwoofer.
Type 1 Way 1 Speaker
Impedance 3 Ω
Rated Input Power 200 W RMS
Max. Input Power 400 W RMS
Dimensions (W x H x D) Approx. 171.0 mm x 390.0 mm x 261.0 mm
yDesigns and specications are subject to change without prior notice.

Appendix 37
Appendix
5
Handling the Speaker
When shipping the speaker
Please save the original shipping carton and packing
materials. If you need to ship the speaker, for
maximum protection, re-pack the speaker as it was
originally packed at the factory.
Keeping the exterior surfaces clean
yDo not use volatile liquids such as insecticide spray
near the speaker.
yWiping with strong pressure may damage the
surface.
yDo not leave rubber or plastic products in contact
with the speaker for a long period of time.
Cleaning the speaker
To clean the player, use a soft, dry cloth. If the
surfaces are extremely dirty, use a soft cloth lightly
moistened with a mild detergent solution. Do not use
strong solvents such as alcohol, benzine, or thinner,
as these might damage the surface of the speaker.
Produkt Specifikationer
Mærke: | LG |
Kategori: | Soundbar |
Model: | SL4F |
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