KEF LSX Owner's Manual
KEF LSX is a powerful wireless music system that allows you to enjoy your music in a variety of ways with its connectivity options like Bluetooth, Wi-Fi, and analog inputs. It features KEF's patented Uni-Q driver technology, delivering crystal-clear and immersive sound, along with a built-in Digital Signal Processor (DSP) that lets you customize the sound to your preference. You can stream music from your favorite apps like TIDAL, Spotify, or Airplay, or connect external devices like turntables or CD players.
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LSX
Owner’s
Manual
EN
This manual explains setup, preparation and operation of the LSX Music System
Contents
Section 1 – Introduction Pg 4
About This Manual
Accessories
Features (5)
Section 2 –
Opening the Box
Unpacking the Product
Remote Control (7)
Section 6 – KEF Stream App Pg 14
KEF Stream app
Media Servers
Section 7 – Wi-Fi Pg 15
Wi-Fi Introduction
Router Requirements
First Time Setup Pg 6
– Bluetooth Pg 16
Connection and Operation
Section 9 – TOSLINK & Optical Pg 17
Section 3 – Controls and Connections Pg 8
Master Speaker
Slave Speaker (9)
Uni-Q Driver (9)
Section 4 –
KEF Control app
Cable Mode (12)
Inverse L/R Speaker (12)
Standby Mode (12)
Volume Settings (13)
Volume Control Sensitivity (13)
Volume Limitation (13)
Speaker Information (13)
Send Logs & Information (13)
Connection and Operation
Connecting USB device to LSX
Section 10
Required cable
Phono-stage connection
Amplifiers
Music Integrity Engine (DSP)
Ways to Connect Introduction
Section 5 – KEF Control App Pg 11
–
–
AUX Inputs & Analog Pg 17
Digital Signal Processor Pg 18
Music Integrity Engine™
BASIC Sound Settings (19)
EXPERT Sound Settings (19)
External Subwoofer Operation and Control (20)
Section 12 – TIDAL Pg 21
Connection and Operation
Section 13 – Spotify Connect Pg 21
Connection and Operation
Section 14 – Roon Pg 22
Connection and Operation
2
Section 15 – Apple Airplay2 Pg 23
Connection and Operation
Section 16 –
A.
Digital Music Resolution
B.
Home Automation driver downloads
Subwoofer Operation Pg 23
Subwoofer Connection
KEF Control App BASIC mode
Section 17 –
D.
System Block Diagram (33)
E.
System Specifications (34)
Updating the Firmware Pg 24
KEF Control and Stream App
Section 18 – Care & Cleaning Pg 27
Modern Lifestyle White
MY S Edition Olive Green
Red & Blue Contemporary
Classic Audiophile Black versions
Section 19 – Troubleshooting Guide Pg 28
Troubleshooting Tips for Common Issues
3
1
–
Introduction
About This Manual
• Illustrations of English language menu screens, options, accessories and instructions are used
• This manual is specific to features available in the United
States and Canada o Options and features in other regions may vary
• Due to product improvements, specifications and appearance are subject to change without notice
Icons and their meanings
Indicates use precautions and feature limitations
Indicates tips and hints to help get the most out of your product
4
Accessories
The following items are included with your LSX Wireless Music System:
Remote Control
(1)
Cat6 Ethernet Cable
(1)
Cloverleaf AC power cable
(2)
Features
Here’s what you can do with your new LSX Wireless Music System!
Your new LSX Wireless Music System has been designed to give you the ultimate audio experience in a simple to setup and operate package.
C ONNECTIONS & D EVICES
LSX can be connected to a wide variety of devices, including devices and applications for wireless streaming such as NAS
(Networked Attached Storage) servers , TIDAL™, Spotify
M ULTIPLE W IRELESS C ONNECTIONS
LSX can be connected to your home network wirelessly or via the on-board Ethernet connection.
Connect™, televisions and Digital Optical audio devices,
Bluetooth ™ devices and standard line-level audio devices such as turntables, CD players and cassette decks.
T RUE S TEREO W IRELESS P LAYBACK
Using KEF’s proprietary on -board network Wi-Fi, the Left and
Right channels deliver True Stereo without an interspeaker connection, allowing you to set up your speakers in almost any position without cable limitations. (page 12)
A
LL THE
M
USIC
I
N THE
W
ORLD
TIDAL and Spotify Connect allow you to access virtually all the music in the world simply and easily. (page 21)
C USTOMIZED S OUND
Via the DSP (Digital Sound Processor) on-board the LSX, you can tailor the sound of your units to your taste or to correct audio problems within your listening area. (page 18)
M ULTI ROOM C ONTROL
With Apply Airplay2™ and Roon™ you can contro l multiple devices throughout your home. (page 22,23).
In crowded networking environments, such as an
apartment building or office space, using the Ethernet cable may provide a more stable network connection for streaming.
“Sit Anywhere” T ECHNOLOGY
KEF’s patented Uni -Q speaker allows you to sit virtually anywhere and hear your music or other audio program clearly, just as the artists who created it intended.
H IGH R ESOLUTION S TREAMING
Listen to high-resolution music and audio files at 96kHz/24-bit resolution in Cable Mode. (page 12)
Home Automation Integration
LSX is compatible with standard home automation software platforms. (Appen. 3 pg 31)
C ONTROL & S TREAM A PPS
Install KEF’s Control and Stream apps on your Apple™ or
Android ™ device to access all LS family streaming, control and
DSP features.
2
–
First Time Setup
O PENING THE B OX AND R EMOVING THE S PEAKERS
After unsealing the packing material, carefully lift your speakers out of the box.
Lift the speakers from the side only! Lifting or handling the speakers from the front may cause damage to the Uni-Q drivers.
D
OWNLOAD THE
A
PPS
Download the KEF Control and Stream apps to your mobile or handheld device.
In order to setup your LSX for standard operation, you must connect them to the KEF Control App via a wireless network connection.
C ONNECTING TO P OWER
Remove the (2) cloverleaf AC power cables from the Accessories box and connect both speakers to power.
D ISTANCE B ETWEEN S PEAKERS
• For the best stereo soundstage place the speakers between
3 and 8 feet (1-3m) apart
• Wireless Mode: Up to 15 feet (3m)
• Cable Mode: Up to 24 feet (8m).
6
Opening the Box & Unpacking the Speakers
I
NDICATOR
While waiting to on-board, the Master speaker indicator will slowly alternate between amber and white.
While LSX is connecting to your network the Master Speaker indicator will turn amber and pulse on and off.
O PEN KEF C ONTROL A PP
Master speaker indicator slowly flashing between amber and white.
• The HELLO! screen will appear – please select KEF LSX
• If connecting LSX for the first time, please select
NEXT
• If LSX has previously been connected to your network, please select CONNECT TO EXISTING .
• From your device’s Wi-Fi setup page please select LSX
For first time setup it may take as long as 5 minutes for your network to find and connect to the LSX. iOS devices require that you leave the KEF Control App by pressing the HOME button and entering the SETTINGS page.
Once you have selected the LSX from this page, please return to the KEF Control app.
• Choose your Wi-Fi network. Be sure to connect device and LSX to the same network
• Enter your network password and press NEXT
• You may rename your speaker. This is helpful for users with more than one networked KEF product
• The LSX will now reboot. The app will indicate when the speakers have rebooted and when they have connected to your network.
• Once connection is successfully completed, the app will advance to the next screen. Press
LET
’
S START
.
I NDICATOR
The indicator on the Master speaker will now be lit solid white, indicating your speakers are in Wi-Fi mode.
On-Screen Instructions
The KEF Control App will now guide you through a short tutorial on app operation.
To play music press
OPEN
KEF
STREAM
.
If there are any available firmware updates for your LSX the app will prompt you to update your system.
In order to keep your LSX running with the latest firmware, please be sure to update your speakers when prompted. For instructions on updating your firmware please see page 24.
Y
OU
A
RE
N
OW
R
EADY TO
L
ISTEN
!
Once you have successfully connected your LSX to your local network and the KEF Control and Stream apps, you are now able to set sound profiles for your various listening sources. Please see page 19 for further information.
7
R EMOTE C ONTROL
The included Remote Control performs the following functions:
• Power On/Off
• Input Select
• Volume +/-
• Mute
• Pause/Play
• Skip Track
When using streaming services such as Spotify Connect or
Tidal, or devices such as CD players, the Pause/Play and
Skip Track functions will not be operable from the LSX remote.
The Remote Control range is approximately 30° on either side of the Master speaker indicator. With fresh batteries the Remote
Control range is approximately 20 feet (6m).
The battery is a standard lithium disk battery catalog number
CR2032. To avoid damage to the remote, please replace with the same type and number.
Using A Universal Remote Control
KEF remote codes have been published to the major Universal
Remote Control manufacturers.
Please see Appendix C for a list of remote codes.
3
–
Controls & Connections
• BT PAIRING Press when pairing LSX to a Bluetooth device.
• M/S PAIRING Use in conjunction with the corresponding button on a slave speaker to facilitate master/slave pairing. Can be used in the event pairing fails, or if the user decides to use a different LSX slave speaker.
• RESET Performs LSX system factory reset, including clearing of network information.
The reset button is below the arrow, the reset indicator above it. Press and hold
RESET button until
RESET INDICATOR flashes. Reset is complete when indicator stops flashing.
• OPTICAL TOSLINK optical audio cable input for connection to television optical output. May also be used for audio devices with optical outputs such as CD players.
• AUX Analog audio input. Connect to audio devices such as turntables, tape decks or CD players.
Analog signals will be converted to a digital stream by the LSX on-board
Analog-to-Digital convertor allowing KEF’s DSP to maintain the highest possible
audio quality from all connected devices.
• SUB Standard RCA-type connector for external subwoofer connection.
• NETWORK Standard Ethernet connection (Cat6 or greater) for direct connection to
local network router.
• SV = 2A OUT USB-A type connector for device charging.
• TO SLAVE Interspeaker connection output to Slave speaker for C
ABLE
M
ODE
.
• AC Connect to AC power
8
Slave Speaker
The LSX slave speaker contains the slave M/S PAIRING button, the interspeaker cable connection for C
ABLE
M
ODE
, and the AC power cable connector.
In normal operation, the indicator on the front panel of the Slave speaker will not be lit.
4
–
Audio Specifications
T HE U NI -Q
LSX features the patented Uni-Q driver for crystal clear audio reproduction no matter where you are situated.
The new 4” Uni -Q driver array is the same signature KEF technology used throughout KEF’s speaker line.
Uni-Q has been in constant development since 1988. Through precise positioning of the drivers, all frequencies are produced from the same point in space.
The effect is an amazing spread of sound. Uni-Q eliminates the tiny ‘HiFi sweet spot’ that only allows one or two listeners to hear the music in its highest quality. Coupled with an extremely natural response, the beauty of the sound is enjoyed equally by everyone in the room.
9
A MPLIFIERS
LSX contains four amplifiers, 2 in each cabinet, in a Dual-Mono Bi-
Amp configuration.
One 70W Class D amplifier in each cabinet powers the bass and mid-range frequencies.
One 30W Class D amplifier in each cabinet powers the highfrequencies.
Total system power is 200W (100WPC RMS)
M
USIC
I
NTEGRITY
E
NGINE
™ & DSP
KEF’s bespoke DSP (Digital Signal Processor), the Music Integrity
Engine™ is designed specifically for the LSX driver and cabinet, allowing LSX to reproduce audio as cleanly and purely as is expected from the LS family of products.
Each cabinet contains its own on-board DSP for precise reproduction and control of the audio output. A precise on-board clock controls the timing between the left and right channels, whether in Cable Mode or when using KEF’s proprietary on -board
Wi-Fi network for complete wireless operation.
Each cabinet also contains the same audiophile-quality DAC as found in the LS50 Wireless.
Consult the section on the KEF Control and Audio Profiles for information on getting the highest quality audio output possible through use of the DSP and Music Integrity Engine. (pg 19)
W AYS TO C ONNECT
LSX easily connects to your music players, storage devices and streaming platforms. For complete information on each connection method please consult the corresponding section for each.
Here is a quick list of all the ways to connect your LSX:
Wi-Fi and Ethernet
Spotify Connect
Spotify Premium required
Bluetooth
TOSLINK Optical
Analog AUX
5
–
KEF Control App
KEF C ONTROL A PP
The KEF Control App acts as a remote control for your LSX. The
Control App also serves to maintain network communications between LSX and your local network.
• System Control (Standby, Source Select)
• Speaker sound settings and profiles
• Speaker left/right assignment setting
• Over-the-Air firmware updates
• User profiles and individual sound settings
The KEF Control app is available as a free download from either the Apple App Store or Google Play.
From time-to-time KEF releases updates to the KEF
Control and Stream Apps. These updates contain
improvements and new features. It is recommended that you update your app as these releases become available.
11
Enter
Volume Control
Select User Profile
KEF Control App
Update Alert
Play/Pause
Switch to
KEF Stream
Settings Menu
Speaker Select
Source Select
Mute
Access Speaker
Sound Settings
KEF Control App
Settings Menu: Access Cable Mode, Inverse L/R Speakers, adjust
Standby Mode, Volume Settings, Speaker Info, Firmware Update information.
Update Alert: Informs that a new firmware update is available. It is recommended that firmware updates are installed as soon as they become available. (pg 24)
Speaker Select: Allows connection to more than one LS family networked device.
Source Select: Select the output source for LSX playback.
Play/Pause: Allows for simple playback control from KEF Control app.
Open KEF Stream: Leave the Control app and enter the Stream app for music playback.
Open Volume Control: Press to fine tune output volume.
Volume can also be controlled via the device ’ s hardware volume controls (rocker switches).
Mute: Toggle the mute function on/off.
Select User Profile: Multiple sound setting profiles can be saved for individual taste, types of music or room locations.
Access Speaker Sound Settings: Set and adjust DSP sound settings.
12
KEF Control App
C
ABLE
M
ODE
With the proprietary on-board 2.4GhZ network the left and right channels are not tethered by a cable for 48kHz/24-bit streaming.
For high-resolution 96kHz/24-bit resolution streaming, switch
C ABLE M ODE on and attach the Cat6 interspeaker cable included in the LSX accessories pack.
C
ABLE
M
ODE
must be selected in the Control App and the interspeaker cable must be connected for highresolution playback. If C
ABLE
M
ODE is selected and the cable is not connected the LSX will not output music. If the cable is connected but C ABLE M ODE is switched off the LSX will playback in 48kHz/24-bit resolution.
I
NVERSE
L/R S
PEAKERS
The Master Speaker default is set to the Left channel and the Slave speaker is set to the Right. If you need to switch the Master to the
Right channel / Slave to Left switch I
NVERSE
L/R S
PEAKERS
to the on position.
This feature allows you to maintain the original mix settings between the Left and Right channels in setups
where you would like to direct connect your Ethernet to your network (for example) via but are limited by cable length or room setup limitations.
S
TANDBY
M
ODE
S TANDBY M ODE allows you to select how long before your LSX will enter standby when idle. Factory default is 20 minutes. This control allows you to set the LSX to enter standby after 20 minutes or 60 minutes of idle time. You can also disable standby by selecting Never which will keep your LSX powered on regardless of activity.
KEF Control App
V
OLUME
S
ETTINGS
H
ARDWARE
V
OLUME
B
UTTONS
Occasionally you may encounter a situation where the setting for the number of volume steps between the KEF Control app and the streaming service you are using are different. This may cause the volume to jump unexpectedly while adjusting the volume using the hardware volume controls (device rocker switches).
If this occurs, disable the hardware volume control to eliminate the issue.
V OLUME B UTTON S ENSITIVITY
This allows you to set the volume step movement for each single press of the device rocker switches.
E
NABLE
L
IMITATION
When switched on, this setting allows you to limit the maximum output volume. The settings are in percentages.
S PEAKER I NFO
Access default product information. In the event your LSX needs service or support some of this information may need to be supplied to our Support Team.
• Speaker Name: The name you gave your speakers during the onboarding process
• MAC Address: (Media Access Control address) is the network address of the device
• IP Address: Internet Protocol address of your LSX
• Speaker Serial No.
: The factory issued serial number of your LSX
• Firmware Version: The current loaded and operating firmware in your system
13
• Forget Speaker : Select this when resetting your speaker or if you need to re-onboard your LSX. This will erase all stored information in the Control app
F
IRMWARE
U
PDATE
This screen alerts you to new firmware releases. Select U PDATE to download the latest firmware to your LSX. (pg 24)
The interspeaker cable must be connected to perform firmware updates.
In order to keep your LSX operating optimally, please be
sure to update the firmware as soon as possible after updates become available.
S
END
L
OGS
& F
EEDBACK
In the event you encounter a problem with your LSX, please contact our Support Team and send our Development Team a log of the activity at the time of the failure or issue. (pg 31)
This information is extremely helpful to our Support Techs in diagnosing the issue. Feedback from the field is also an invaluable aid to our Development Team.
6
–
KEF Stream App
The KEF Stream App controls streaming from your device, server or other network-enabled storage devices.
NEWS: Connect to KEF on the web.
FAVOURITES: Keep track of your favorite tracks stored on your device.
RECENT: Maintains a list of your recently played tracks on your device.
PLAYLISTS: Keep track of and build new playlists on the device and access them here.
LIBRARY: Lists the tracks available on the device.
14
KEF Stream App
M EDIA S ERVERS
Directly access and play your tracks from your network connected storage devices. These devices may include a Network Attached
Storage device (NAS Server), a connected PC or other storage device that resides on the same network as your LSX.
From the main screen you can:
• Access the Control App
• Check the queue
• Check the file type
• Set Shuffle Mode
• Set Repeat Mode
• Pause, Skip Fwd & Back
• Adjust the Volume
• Mute the output
TIDAL
Please consult the TIDAL section for details on using TIDAL via the KEF Stream app and for other ways to access TIDAL via your
LSX. (pg 21)
S
POTIFY
C
ONNECT
Please consult the Spotify Connect section for details on using
Spotify Connect via the KEF Stream app and for other ways to access Spotify Connect via your LSX. (pg 21)
7
–
Wi-Fi Operation
For optimal performance it’s important that your wireless network be as fast and free of interference as possible. Streaming operation and app function are affected by slow network speeds, overcrowding and other network interference issues.
LSX uses the following connection protocols:
Digital Living Network Alliance (DLNA) is a digital media sharing protocol established by Sony which includes promoter members such as Samsung, Google, LG, Microsoft, Panasonic, KEF, etc. In order to allow connection to the largest number of home entertainment devices, LSX uses the DLNA protocol.
Managed by the Open Connectivity Foundation (OCF), UPnP is a series of networking protocols that allow wireless devices to automatically discover each other when plugged into a network.
When UPnP devices are plugged into a network working configurations with other devices are automatically established.
Once added to a UPnP network a device sends a “discover” request asking if there are any other devices it can connect to.
15
M INIMUM R OUTER R EQUIREMENTS
• 802.11n Compatible
• Simultaneous 2.4GHz/5GHz dual-band operation
• Minimum 54Mbps 5GHz transmission speed
R OUTER R EQUIREMENTS
There are two router bands available on most current network equipment – 2.4GHz and 5GHz. Most standard routers supplied by your cable or internet provider will be Dual-Band routers that contain both frequency bands.
For large data transfer operations like music streaming, the 5GHz band is generally a better option. In most homes and offices, the
2.4GHz band tends to be crowded, (e.g. devices such as Smart appliances, baby monitors, and other connected devices typically default to the 2.4GHz band).
The 5GHz band is generally a better choice for streaming because of data speeds and lower usage, however, if your speakers are set up far from your router (another floor, the other side of your building, etc.) it is often advisable to use the 2.4GHz band. The
5GHz band has a shorter range with weaker signal strength than the 2.4GHz band.
For proper wireless operation, 54Mbps is the minimum allowable bandwidth, however, for optimal performance a bandwidth of
1500Mbps should be considered the minimum. MU-MIMO capability is necessary. Contact your internet provider for further information on your equipment’s capabilities.
Bandwidth
Bandwidth is the amount of data transferred measured in seconds.
A bandwidth of 1500Mbps indicates your network is capable of transferring 1500 million bits of data per second.
MU-MIMO
Multi-user - multiple input/multiple output. MIMO is a wireless communication technology that allows a set of users or wireless terminals, each with one or more antennas, to communicate with each other on a network.
Network Tips
When on-boarding your speakers, be sure to connect them to the same network as your device (phone, tablet, etc.).
2.4GHz band: To avoid cross-interference and channel contention issues avoid using Channel 1. Check your routers operation manual for information on how to select channels.
2.4GHz band: All channels are available but for optimal performance channels 6 and 11 are recommended.
In crowded network environments it is advisable to use the Ethernet connection from your router to avoid
network failures such as drop-outs during streaming.
There are apps available that allow you to check which channels are available and what your network signal
strength is. These may help you set up the best possible streaming environment for your LSX.
16
8
–
Bluetooth
I NDICATOR
LSX features Qualcomm’s aptX codec for near -CD quality wireless streaming from an aptX compatible device. If the source device is not aptX compatible the higher compression of Bluetooth
4.0 will be transmitted and decoded.
C ONNECT T O B LUETOOTH
Select the Bluetooth icon from the KEF
Connect App homepage. LSX will enter pairing mode.
For first time connection you
may have to enter your device ’ s
Bluetooth menu and select LSX.
In the event you encounter a problem pairing your device to LSX, there is a
Bluetooth Pairing button on the rear of the Master speaker.
The BT P
AIRING indicator blinks during search mode. Press and hold the BT P AIRING button until the indicator stops blinking, which indicates a device has been paired to LSX.
9
–
Optical
I NDICATOR
Select the OPT input from the KEF Connect app homepage.
LSX supports connection to 96kHz/24-bit digital sources. Optical digital sources include televisions,
DVD players, CD players, etc. Connection is made via a standard TOSLINK cable (not included).
For use with a television, DVD, or streaming service such as Netflix, Hulu, etc.) the audio stream from the source device must be set to PCM (two-channel stereo mode).
Latency via the optical input is extremely low and should not be noticeable, even in wireless mode.
C
ONNECTING A
USB D
EVICE TO
LSX
If you would like to connect a USB audio device such as a PC or laptop to LSX, use a commercially available USB-to-Optical converter (not included) and select the Optical input as described above.
17
10
–
AUX & Analog Inputs
I NDICATOR
Select the AUX input from the KEF Connect app homepage.
LSX supports standard 3.5mm stereo input jacks for connection to your analog devices
(turntables, tape decks, Smartphone headphone outputs).
There are a variety of connection adapters available for
connecting the 3.5mm stereo cable to standard RCA-type
pin jacks. The cable converter shown below is necessary for connecting LSX to a standard turntable phono connection, analog tape deck, or other similar device.
For use with a turntable you may need to install a phonostage pre-amp between LSX and the device.
11
–
Digital Signal Processor
LSX is a digital music system utilizing a Digital Signal Processor
(DSP) to prepare either a digital or analog audio input for playback.
By using a DSP, we are able to use an active crossover network, pre-amp, and equalization settings in the digital domain without introducing unwanted phase and noise errors common in the analog domain.
M USIC I NTEGRITY E NGINE ™
In a multi-driver system such as LSX, the audio signal must be split by frequency and sent to the driver that can best handle that frequency (e.g. the high frequencies are sent to the HF driver
(tweeter) and the low frequencies are sent to the MF/bass driver).
Crossovers introduce small amounts of phase shift during this operation which causes some signals to be out-of-phase with others changing the final output by introducing time-smearing and phase distortion.
KEF ’s M USIC I NTEGRITY E NGINE ™ works in conjunction with our point-source Uni-Q to eliminate this phase distortion. This engineering feat, added to the DSP, allows LSX to produce nearperfection in time-alignment and musical reproduction.
You can toggle the Phase Correction operation on and off
in the KEF Control App: Advanced Mode>Phase
Correction.
18
DSP Sound Profiles
LSX is tuned at the factory for audiophile-quality reproduction right out of the box. You can enjoy incredible sound without making any adjustments to the DSP.
However, to tune LSX to your liking or to correct audio issues in your listening space, the KEF Control App allows you to adjust certain frequencies to further enhance your audio enjoyment.
Press here for Sound Profiles.
Once you have entered the Audio Signature page on the KEF
Control App, press Add New Profile .
You can choose between two setting types: BASIC and
EXPERT . Both perform the same function approached from different directions. BASIC allows users who don’t want to spend a lot of time learning technical terms to set their LSX for optimal performance, while EXPERT uses terminology familiar to users with some audio setup experience.
Regardless of which method you choose, the result will be the same – audio output tailored to your taste or individual room requirements.
B ASIC S OUND S ETTINGS
For detailed explanations on the individual setting adjustments, please consult the EXPERT SOUND SETTINGS section.
Where Is Your Speaker?
On a Stand/On a Desk: Bass and midrange response will vary depending whether the speakers are placed on a desk or tabletop.
( Advanced: Desk Mode )
Distance to the wall
Bass response can be affected by the speakers’ proximity to a wall
(especially behind them). This setting adjusts to compensate for that.
( Advanced: Wall Mode )
How is your room?
Damped rooms tend to reduce bass response, while Lively rooms will accentuate high frequencies making them sound harsh. This setting compensates for that. ( Advanced: Treble Trim )
How large is your room?
In smaller rooms bass can get overwhelming, changing the balance of an audio program, while in larger rooms the bass may get lost, resulting in too much treble. ( Advanced: Bass Extension )
Subwoofer plugged in
Please consult Section 16 – Subwoofer Operation for details on this setting.
19
E XPERT S OUND S ETTINGS
Desk Mode
A horizontal surface in front of a speaker can act as an additional front baffle altering the frequency response of the speaker. The
Desk Mode adjustment attenuates frequencies centered at approximately 180Hz (50Hz to 500Hz) in ½ dB steps to compensate for reflections when the speakers are set on a table or desktop.
Wall Mode
LSX is a rear-ported speaker, meaning that bass frequencies emanate from the rear of the speaker, enhancing overall bass response. In some setups, when the speakers are placed close to a rear wall or enclosure, bass response can be artificially elevated.
The Wall Mode adjustment attenuates frequencies from approximately 300Hz and below (the bass region) in ½ dB steps to minimize or eliminate artificial bass response caused by reflections from the rear wall or vertical surface.
Treble Trim
Room environments vary, depending on several factors, from lively to dampened. The Treble Trim adjustment boosts or attenuates frequencies from 900Hz and above (the mid- and high-frequency region) in ½ dB steps to compensate for your room’s sonic environment.
Room Types
Lively High ceilings, hard surfaces like marble, hardwood floors and glass. Furnishings are not large.
Moderate A mixture between the two.
Dampened Low ceilings, carpeted floors, heavy drapes, walls with art and decorations. Furnishings are large and cushioned heavily.
Subwoofer and Bass Settings
Phase Correction
Please refer to the M
USIC
I
NTEGRITY
E
NGINE
™ section for more information on this option.
Bass Extension
Less Attenuates bass response. Useful for listening at louder levels in smaller rooms.
Extra Boosts bass response.
Useful for listening at lower levels in larger rooms.
High-pass Mode
When using an external subwoofer, this setting allows you to finely tune the frequency cut-off for frequencies sent to the LSX drivers.
The minimum high-pass setting is 50Hz and the maximum is
120Hz. Use in conjunction with the Sub out low-pass frequency setting to fine tune the relationship between the subwoofer and the LSX.
Sub out low-pass frequency
This is the frequency at which the signal is sent to the subwoofer and not to the LSX drivers. Frequencies below the set point will be sent to the subwoofer. The higher the set point the more bass
(in frequency) is sent to the subwoofer.
For best results when using this setting, set the crossover control on the subwoofer to its highest position and
control the crossover output from the KEF Control App.
20
Sub gain
Allows you to control the subwoofer volume from the KEF
Control App.
For best results, turn the volume control on the subwoofer past the highest position you would be likely to
use. This will allow you to control the volume of the subwoofer from the KEF Control App.
Sub polarity
This setting adjusts for setups where the subwoofer output is not in the same phase as the LSX output.
For example, in an extreme condition, a subwoofer may be set up facing the LSX. This would cause the subwoofer to be 180° out-ofphase with the LSX output which would diminish bass response noticeably. For this condition, the polarity selected would be .
There are several other factors that affect subwoofer polarity. For best results, switch between the two settings
while playing the same audio output and let your ears determine whether the polarity should be set to + or .
Saving Your Custom Profiles
After you are satisfied with your adjustments, select the Save option. Multiple profiles can be saved for future reference.
Different programs and sources may be mixed and mastered differently and will therefore sound different on
your speakers. You may want to save separate profiles for louder music, television programs, or any of your other sources and preferences.
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–
TIDAL
About TIDAL
TIDAL is a subscription-based music, podcast and video streaming service that offers access to over 60 million music tracks and 240,000 videos. TIDAL features lossless audio, exclusive content and special features.
TIDAL is accessed via the KEF Stream App main page.
Selecting TIDAL will redirect you to the TIDAL main page for your account. TIDAL streams to the LSX via Wi-Fi.
To access TIDAL via the KEF Control App and LSX, you must have a separate TIDAL account.
For the best streaming experience, select HiFi
in the TIDAL settings
( Wi-Fi Streaming Quality) .
TIDAL content does not download. In crowded network environments, or with a router that cannot keep up with the bitrates necessary for
High Resolution streaming, dropouts and delays may occur. In this event, please select either the
Normal or High streaming quality settings.
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13
–
Spotify Connect
Indicator
About Spotify Connect
Available with a Spotify Premium subscription for streaming CD quality music via Wi-Fi to LSX. Spotify Connect offers higher resolution streaming via the LSX Wi-Fi connection when compared to the Bluetooth connection.
How to Connect
From the KEF Stream App, select
Spotify then select Open
Spotify . You will be directed to your Spotify Premium account home page. Spotify Connect can also be accessed from your desktop Spotify app.
Once you have opened Spotify
Connect you can select LSX from the Available Devices menu at the bottom of the screen.
Select LSX from the Devices
Available menu.
Spotify Connect From a Desktop Device
Spotify Connect can also be accessed from your desktop PC.
Simply select the LSX from the Devices Available menu.
From your desktop, select High Quality Streaming which allows streaming bitrates up to 320kbps. This
setting allows up to CD quality streaming.
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14
–
Roon
About Roon
Roon is a powerful application that uses the computing power in your desktop device to stream high-resolution files up to
192kHz/24-bit resolution (96kHz/24bit with LSX), while using the power of the Internet to compile photographs, biographical material, reviews and the latest news from the artists you are listening to.
LSX communicates with Roon and your desktop device via Wi-Fi.
Roon is a subscription-based service that can be purchased separately.
Connect your entire library (desktop storage, NAS server, etc.) via Roon, which also allows for multiple systems throughout your home to be controlled from the desktop platform.
TIDAL is also available through the
Roon application.
For more information on Roon please visit www.roonlabs.com
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–
Apple AirPlay 2
A BOUT A IR P LAY 2
Apple AirPlay 2 allows multi-room streaming from your Apple device (iPhone, iPad,
HomePod, etc.).
To stream music via
AirPlay2, simply connect
LSX to the same network as your sending device.
From the Music app on your Apple device, choose
LSX.
AirPlay 2 will then stream the music stored on your device directly to LSX.
Be sure you have the latest LSX firmware loaded for
AirPlay 2 operation.
Apple Airplay2 works as a simple Send/Receive network. Your receiving device will appear here.
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16
–
Subwoofer Operation
E XTERNAL S UBWOOFER C ONNECTION
Connect an external subwoofer (such as KEF Kube) to LSX via a simple
RCA-type pin jack located on the rear of the Master speaker.
Subwoofer volume, crossover and phase can be controlled from the KEF
Control App.
KEF C
ONTROL
BASIC
From the KEF Control app in BASIC mode select Subwoofer Plugged In .
From the BASIC menu you can control the overall subwoofer volume via the Subwoofer Volume slider.
Use the Speaker/subwoofer balance slider to control how much bass is sent to the subwoofer or LSX. With the slider set all the way to the right ( Subwoofer ) the connected subwoofer will handle all of the bass frequencies. With the slider set all the way to the left ( Speaker ) LSX will handle all but the lowest bass frequencies.
Please refer to Section 11 (Page 20 – LSX DSP Expert Mode
Settings) for details on external subwoofer operation and the KEF
Control App.
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–
Updating the Firmware
The KEF Control App will automatically alert you to available firmware updates. It is recommended that you update the firmware as soon as possible after your new outof-the-box LSX has been successfully on-boarded and is up and running.
Always update the app and the firmware when new versions become available. New features and general app/firmware improvements are released via these updates.
The KEF Control App will notify you when firmware updates are available.
KEF Control and Stream Apps
As new versions of the KEF Control and KEF Stream Apps are released please update via the Apple App Store or Google Play.
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H OW TO U PDATE THE F IRMWARE
LSX features Over-the-Air firmware update capabilities, meaning that once LSX is connected to a network, you do not need to connect a cable from your host device (desktop, etc.) to update the firmware.
The interspeaker cable connecting the Master to the Slave speakers MUST be connected in order to update the firmware.
1. From the KEF Control App FIRMWARE UPDATE page select UPDATE .
2. The update will begin
The KEF Control App will keep you posted as the operation progresses.
3. DO NOT unplug or turn off your LSX during the update!
The update will not be affected by an incoming phone call or text during the operation. Avoid allowing your device
to enter sleep mode during the update operation.
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4. Depending on network environment and the size of the update, the update may take up to 20 minutes to complete.
I NDICATORS
During the update operation the LSX indicators will alternate sequentially.
4. After the firmware has been successfully updated, LSX will reboot to allow the update to take effect.
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4. After the update is complete and the speakers have been rebooted the operation is complete.
If for any reason, the update fails at any point during the procedure, please send a log to our Development and
Support team.
18
–
Care & Cleaning
LSX comes in five designer versions – Modern Lifestyle
White, Red Contemporary,
MY
S Olive Green, Blue
Contemporary and Classic Audiophile Black.
The Modern Lifestyle White comes in a gloss lacquered version; the other versions feature a Kvadrat fabric wrap.
C
ARING FOR THE
M
ODERN
L
IFESTYLE
W
HITE
Use a soft cloth and a mild surface cleaner designed for use with plastic. Gently dry with a soft cloth.
C ARING FOR THE K VADRAT F ABRIC
To keep the fabric looking vibrant and fresh, vacuum frequently with a soft brush attachment.
Gently remove any hardened residues or liquids. Vacuum any loose particles prior to further cleaning.
Soak up liquid spills with an absorbent cloth or paper towel. Do not rub the cloth to avoid leaving further residue in the fabric.
Remove non-greasy stains by carefully dabbing the stain with a lintfree cloth or sponge dampened warm water.
Edge marks can be avoided by dabbing gently in circular motions toward the center of the stain with a clean lint-free cloth.
Remove greasy stains by using appropriate detergents or solvents.
Be sure to test stain removal agents on an inconspicuous area first.
Follow all manufacturer instructions.
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Do not scrub the fabric as this may damage the fabric or result in loss of color.
Do not use detergents, cleaning agents, or cloth intended for hard surfaces.
Do not use any cleaning solution or liquid to clean the
Uni-Q Driver or the surround around it. Gently vacuum accumulated dust as needed and wipe with a dry, soft, lintfree cloth.
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Troubleshooting Guide
LSX has been designed and tested for years of troublefree operation, but occasionally problems may occur.
Most likely the cause of the trouble can be easily identified and solved. In the event you have questions, concerns or are unable to solve any issue with your LSX, please contact our Customer Support Team at
(732) 683-2356 or via email at [email protected]
1. Network Unavailable – Can I Still Operate LSX?
In order to take advantage of all available features, LSX must be connected to a home network with a live internet connection.
If you do not have a network available, it is possible to disable network functionality during speaker set-up.
1.
Hold the remote control source button for 5 seconds
2.
The indicator on the Master speaker will turn from orange/white to orange/blue
3.
In this mode, only Bluetooth, Optical and Aux will be selectable as sources using the remote control
4.
A factory reset is required to restore network functionality
2. Control App Cannot Find My LSX During On-Boarding
1.
Perform a factory reset by holding the reset button on the back of the Master speaker for ~5 seconds until the Reset
LED flashes orange
2.
Wait until the reset LED indicator stops flashing
3.
Exit the KEF Control App
4.
Unplug the power cable from the Master speaker and wait
~60 seconds before plugging it back in
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5.
The Master speaker indicator should be alternating orange/white, indicating LSX is in setup mode
6.
It may take up to 1 minute for LSX to become discoverable
7.
Enter the KEF Control app and select Setup New
Speaker and follow the on-screen instructions
If the problem persists, please check the following:
• The LSX broadcasts on 2.4GHz via channel 1. If your router is also broadcasting on 2.4GHz via channel 1, LSX will not be discoverable
• Change your router to another channel (please see your router manual for details)
• Disable any VPN apps on your phone, as they may interfere with Wi-Fi detection
• If the problem persists, please send a log with a description of the problem from inside KEF Control app: Settings >
Send Logs & Feedback or contact [email protected]
3. My LSX does not appear on my network
Make sure the speaker is powered on and has been successfully onboarded to your network. The Master speaker indicator will be lit solid orange. If not, please refer to Item 2 in this section.
1.
In the KEF Control app:
Navigate to Add new speaker >
Connect to existing > Search again .
2.
Make sure your smartphone is connected to the same network as LSX
3.
Select your speaker and press Connect
If the Master speaker indicator is pulsing orange, ensure that your router is powered on and connected.
4. When connected to a television, I only get a highpitched squeal from my speakers.
LSX is a two-channel stereo system and cannot decode streaming service or video programs are encoded in Dolby ™ or DTS ™ .
Switch the output of your service or television to PCM.
M ASTER S PEAKER I NDICATOR A LARMS AND C ODES
Amber. Blinking on and off.
Connection Error. Check your network connections and setup then refer to Item 2 in this Section. If problem persists, contact
Customer Service.
Green. Pulsing.
Connecting to Spotify.
Alternating Blue/Magenta/Yellow/White
Firmware update mode.
Red. Blinking.
Firmware Upgrade Failed . Restart procedure. If problem persists contact Customer Service.
Alternating Blue/White.
Bluetooth Pairing mode.
Alternating Yellow/Cyan.
Error. Indicates the Slave speaker is not connected or has not been found. Check KEF Control App to make sure Cable Mode is not selected. If Cable Mode is selected, disable or connect the interspeaker cable. If this condition has existed for several minutes, you may need to perform a factory reset.
Red. Blinking.
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Master Speaker Error. Check cable connections, power off and on. If that does not correct error, unplug for >10 minutes, reconnect to power and perform factory reset.
Slave Speaker Indicator Alarms and Codes
Alternating Blue/Magenta/Yellow/White
R EPORTING I SSUES
Firmware update mode.
Red. Blinking.
Firmware Upgrade Failed . Restart procedure. If problem persists contact Customer Service.
Alternating Blue/White.
Bluetooth Pairing mode.
Alternating Yellow/Cyan.
Error.
Slave speaker not connected to Master speaker. Ensure
Cable Mode is not selected without interspeaker cable being connected.
Red. Blinking.
Slave Speaker Error. Power off and on. If that does not correct error, unplug for >10 minutes, reconnect to power and perform factory reset.
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Networked products are complicated and often issues may appear to be related to the LSX system while they are results of network problems.
If any irregular activity is noticed, please utilize the Send logs & feedback feature in either the KEF Control or KEF Stream. This will open an email as shown above. Important information concerning the LSX and App operation at the time leading up to the failure or anomaly will be automatically populated.
Please describe in as much detail as possible what happened and the physical setup of the relevant equipment in the section below the Subject line.
Appendices
A PPENDIX A – D IGITAL M USIC R ESOLUTION
High Resolution
High-Resolution Audio is sampled at 96kHz/24-bit and above.
Resolutions up to 192kHz/24-bit are the current standard for consideration as high-resolution.
The standard resolution for TOSLINK digital optical audio is
96kHz/24-bit.
LSX will stream audio information up to 96kHz/24-bit in Cable
Mode . Higher resolutions will be downsampled to 96kHz/24-bit.
Standard Resolution
Resolutions below 96kHz/24-bit are considered standard resolution.
Television broadcast standard resolution is 48kHz/24-bit.
CD standard resolution (Red Book) is 44.1kHz/16-bit. aptX Bluetooth resolution is standard up to 48kHz/24-bit.
LSX converts analog program material to 96kHz/24-bit before streaming. (Playback will be set to 48kHz/24-bit for wireless streaming (not in Cable Mode )
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A
PPENDIX
B – TCP/IP C
ONTROL
D
RIVERS
LSX can be integrated into the following Home Automation platforms:
Control 4, RTi, Crestron, Elan
Drivers are available as direct downloads from Intrinsic (Dev) https://www.intrinsicdev.co.uk/
Available from Savant ( www.savant.com
). The LS control driver is downloaded directly as part of Savant’s so ftware suite.
Contact your authorized dealer/integrator or installer for information on how to add LSX to your Home Automation platform.
The following commands can be controlled via the Home
Automation drivers:
• Volume +/-
• Input
• Play/Pause/Skip o (native to device; not available for 3 streaming services) rd party
A PPENDIX C – IR U NIVERSAL R EMOTE C ODES
LSX can be connected to your Universal Remote Control via the following codes.
Codes are also published to the major US manufacturers and can be found in each corresponding database.
Function Notes Command NEC
Code
AUX (Source) 0x02
Bluetooth (Source) 0x2A
Bluetooth Pairing
Mute
Mute / Unmute
Next
0x98
0x48
0x20
0x52
Optical (Source)
Pause
Play
Play/Pause
Power Off
Power On
Power On/Off
Previous
0x0A
0x70
0x6A
0x18
0x3A
0x38
0x40
0xD2
Source Selection
Unmute
USB (Source)
Volume -
Volume +
Volume Preset
Wi-Fi (Source)
0x58
0x4A
0x1A
0xA0
0x60
0x78
0x30
Discrete
Discrete
Discrete
Discrete
Toggle
Toggle
Discrete
Discrete
Discrete
Toggle
Discrete
Discrete
Toggle
Toggle
Toggle
Discrete
Discrete
Toggle
Toggle
Discrete
Discrete
Bluetooth mode only
Bluetooth & Wi-Fi only
Bluetooth only
30% All Sources
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A PPENDIX D – S YSTEM B LOCK D IAGRAM
A PPENDIX E – S YSTEM S PECIFICATIONS
34
Trademarks
Android™ is a registered trademark of Google LLC
Registered trademark of Apple, Inc.
App Store is a service mark of Apple, Inc.
AirPlay2 API manufactured under license from Apple, Inc. Indicates this product is designed under license to operate with AirPlay2.
The Bluetooth ™ word mark and logos are registered trademarks owned by Bluetooth SIG, Inc., and use of said marks is under license.
Is a trademark of Savant Systems, LLC.
Registered trademark of Intrinsic Dev (UK), a Core
Programming Company. aptX is a trademark of Qualcomm Technologies International, Ltd., registered in the United States and other countries.
Windows™ is a registered trademark of Microsoft Corporation.
iOS ™ is a registered trademark of Apple, Inc.
35
The Spotify logo and Spotify Connect are trademarks of the Spotify
Group and indicates this product contains licensed 3rd party software designed to operate with Spotify Connect.
Registered trademark of Roon Labs. Indicates this product is designed and licensed to operate with the Roon Labs software application.
UPnP is a trademark of the Open Connectivity Foundation, Inc.
DLNA® and the DLNA logo are trademarks and service marks of the Digital Living Network Alliance.
Registered trademark of TIDAL Music Streaming Service.
Indicates this product is licensed to operate with TIDAL. with TIDAL.
Dawes – Stories Don’t End ©2013 HUB Records, UMG, WMG, Audiam
Oasis – (What’s the Story) Morning Glory? ©1995 Creation Records, SME
The Replacements – Pleased to Meet Me ©1987 Sire Records
Main Sites
KEF Global Site: www.KEF.com
KEF US: www.us.KEF.com
KEF Canada: www.ca.kef.com
KEF Direct: www.kefdirect.com
Product Support and Downloads http://us.kef.com/product-support
KEF Technical Publications
© 2019 KEF / GP Acoustics
Published 02/2019
Doc Revision R01
LSX Owner’s Manual

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