KEF LSX II Wireless Speaker System User Manual
- June 10, 2024
- KEF
Table of Contents
LSX II Wireless Speaker System
Product Information: LSX II
The KEF LSX II is a wireless speaker system designed for home
use. It supports wireless streaming protocols, including Chromecast
and AirPlay 2, and can be controlled through voice commands using
Siri or Google Assistant. The KEF Connect app is also available for
download, which provides additional features and controls for the
LSX II.
General Information
The user manual for the LSX II should be read and stored for
future reference. The signal symbols used throughout the manual are
defined in section 2.2.
Setting Up
To set up the LSX II, follow the instructions provided in
section 4 of the user manual. This includes connecting the speakers
to a power source and network, as well as configuring settings
through the KEF Connect app.
Wi-Fi Streaming
The LSX II supports wireless streaming protocols, including
Chromecast and AirPlay 2. This allows for audio to be played from
compatible devices without the need for cables or additional
hardware. See section 6.1 for more information on wireless
streaming protocols.
Multi-Room Streaming
The LSX II supports multi-room streaming through AirPlay 2,
Chromecast, and ROON. See section 7 for more information on setting
up and using multi-room streaming.
Voice Control Over Mobile Device
The LSX II can be controlled through voice commands using Siri
or Google Assistant on a mobile device. See section 8 for more
information on setting up and using voice control.
Using KEF Connect App
The KEF Connect app provides additional features and controls
for the LSX II. See section 14 for more information on using the
app.
Cleaning and Maintenance
Regular cleaning and maintenance of the LSX II is recommended to
ensure optimal performance. See section 15 for instructions on how
to clean and maintain the speaker system.
Warning Symbols
Section 18.3.1 provides a list of warning symbols used
throughout the manual.
Regional Symbols
Section 18.3.2 provides a list of regional symbols used
throughout the manual.
IR Command Codes
Section 18.4 provides IR command codes for the LSX II.
Product Usage Instructions:
To use the KEF LSX II, follow these steps:
-
Read and store the user manual for future reference.
-
Connect the speakers to a power source and network as described
in section 4 of the user manual. -
Configure settings through the KEF Connect app.
-
Use wireless streaming protocols such as Chromecast or AirPlay
2 to play audio from compatible devices, as described in section
6.1. -
Set up and use multi-room streaming through AirPlay 2,
Chromecast, or ROON as described in section 7. -
Use voice commands through Siri or Google Assistant on a mobile
device to control the LSX II, as described in section 8. -
Download and use the KEF Connect app for additional features
and controls, as described in section 14. -
Clean and maintain the LSX II regularly, using the instructions
provided in section 15.
User Manual LSX II
FAQ and Troubleshooting
Using KEF Connect App
Wi-Fi Streaming
Setting Up
Table of Contents
Table of Contents
1. Introduction ……………………………………………………………………………………………………………….5 2. General
Information…………………………………………………………………………………………………..6
2.1 Reading and Storing the User Manual……………………………………………………………………………………………….6
2.2 Signal Symbol/Word Definitions …………………………………………………………………………………………………………6
3. In the Box and Unpacking………………………………………………………………………………………….7 4. Setting Up
LSX II ……………………………………………………………………………………………………….8
4.1 Selecting an Appropriate Router ………………………………………………………………………………………………………..8
4.2 Connecting to Power……………………………………………………………………………………………………………………………….9 4.3
Onboarding……………………………………………………………………………………………………………………………………………….10
4.3.1 Installing the KEF Connect App…………………………………………………………………………………………………10
4.3.2 Using iOS Devices………………………………………………………………………………………………………………………….. 11
4.3.3 Using Android Devices with Google Play Service……………………………………………………………..
12 4.3.4 Using Android Devices without Google Play
Service………………………………………………………14 4.4 Speaker Placement and
Connection……………………………………………………………………………………………….16 4.5 Installation
Accessories…………………………………………………………………………………………………………………………17 4.5.1 Wall
Brackets…………………………………………………………………………………………………………………………………….17 4.5.2 Desk
Pads……………………………………………………………………………………………………………………………………………17 4.5.3 Floor
Stands……………………………………………………………………………………………………………………………………….17
5. Connection and Control Interface………………………………………………………………………….18 5.1 Front
Panel…………………………………………………………………………………………………………………………………………………18 5.2 Back Panel
………………………………………………………………………………………………………………………………………………….19 5.3 Bottom Panel
……………………………………………………………………………………………………………………………………………20 5.4 LED
Indications………………………………………………………………………………………………………………………………………..21 5.5 Remote
Control………………………………………………………………………………………………………………………………………22 5.6 KEF Connect
App …………………………………………………………………………………………………………………………………..23
6. Wi-Fi Streaming ……………………………………………………………………………………………………….24 6.1 Wireless
Streaming Protocols ……………………………………………………………………………………………………………24
6.1.1 AirPlay 2………………………………………………………………………………………………………………………………………………24 6.1.2
Chromecast……………………………………………………………………………………………………………………………………….25 6.1.3 ROON
Ready……………………………………………………………………………………………………………………………………26 6.1.4 Music
Streaming Apps Native Protocols ……………………………………………………………………………….27
6.1.4.1 Spotify Connect……………………………………………………………………………………………………………………..27
6.1.4.2 QPlay ………………………………………………………………………………………………………………………………………….28 6.1.4.3
TIDAL Connect ……………………………………………………………………………………………………………………29 6.1.5 KEF Connect
App Streaming ……………………………………………………………………………………………………..30 6.1.5.1 Amazon
Music………………………………………………………………………………………………………………………..30 6.1.5.2
Deezer……………………………………………………………………………………………………………………………………….30 6.1.5.3
Qobuz………………………………………………………………………………………………………………………………………..30 6.1.5.4
Spotify………………………………………………………………………………………………………………………………………..30 6.1.5.5
TIDAL…………………………………………………………………………………………………………………………………………31 6.1.5.6 Internet
Radio…………………………………………………………………………………………………………………………31 6.1.5.7
Podcasts…………………………………………………………………………………………………………………………………….31 6.1.6 UPnP
Playback …………………………………………………………………………………………………………………………………. 31 6.2 Tips on
Choosing Streaming Protocols ………………………………………………………………………………………….32
7. Multi-Room Streaming …………………………………………………………………………………………….33 7.1 AirPlay 2
……………………………………………………………………………………………………………………………………………………..33
2
7.2 Chromecast ………………………………………………………………………………………………………………………………………………33 7.3
ROON…………………………………………………………………………………………………………………………………………………………35
8. Voice Control Over Mobile Device ………………………………………………………………………. 36 8.1
Siri………………………………………………………………………………………………………………………………………………………………….36 8.2
Google Assistant……………………………………………………………………………………………………………………………………..36
9. Playback with Bluetooth ………………………………………………………………………………………….37 9.1
Selecting Bluetooth Mode …………………………………………………………………………………………………………………..37 9.2
Bluetooth Pairing …………………………………………………………………………………………………………………………………….37 9.3
Playback Controls……………………………………………………………………………………………………………………………………38
10. Playback with HDMI ARC input ……………………………………………………………………………..39 10.1 HDMI
Cable Connection…………………………………………………………………………………………………………………….39 10.2 Selecting
TV Mode…………………………………………………………………………………………………………………………………40 10.3 Playback
Controls……………………………………………………………………………………………………………………………………40
11. Playback with Optical Input …………………………………………………………………………………….41 11.1
Optical Cable Connection ………………………………………………………………………………………………………………….41 11.2
Selecting Optical Mode………………………………………………………………………………………………………………………..42 11.3
Playback Controls……………………………………………………………………………………………………………………………………42
12. Playback with USB Input ………………………………………………………………………………………….43 12.1 USB
Connection ……………………………………………………………………………………………………………………………………..43 12.2
Selecting USB Mode………………………………………………………………………………………………………………………………44 12.3
Playback Controls……………………………………………………………………………………………………………………………………44
13. Playback with Auxiliary Input ………………………………………………………………………………… 45 13.1
Auxiliary Cable Connection……………………………………………………………………………………………………………….45 13.2
Selecting Auxiliary Mode……………………………………………………………………………………………………………………..46 13.3
Playback Controls……………………………………………………………………………………………………………………………………46
14. Using KEF Connect App ………………………………………………………………………………………….47 14.1 Home
…………………………………………………………………………………………………………………………………………………………..47
14.1.1 Overview ……………………………………………………………………………………………………………………………………………47 14.1.2
Editing the Home Screen……………………………………………………………………………………………………………..48 14.2
Remote Control………………………………………………………………………………………………………………………………………48 14.3 Music
Content………………………………………………………………………………………………………………………………………….49 14.3.1 Playing
Music from Music Streaming Services ……………………………………………………………………..50
14.3.1.1 Amazon Music………………………………………………………………………………………………………………………..50
14.3.1.2 Deezer……………………………………………………………………………………………………………………………………….51 14.3.1.3
Qobuz………………………………………………………………………………………………………………………………………..52 14.3.1.4
Spotify………………………………………………………………………………………………………………………………………..52 14.3.1.5
Tidal…………………………………………………………………………………………………………………………………………….53 14.3.1.6
Internet Radio…………………………………………………………………………………………………………………………54 14.3.1.7
Podcast………………………………………………………………………………………………………………………………………54 14.3.2 Playback
Controls ……………………………………………………………………………………………………………………………55 14.3.2.1 Playback
Screen ……………………………………………………………………………………………………………………..55 14.3.2.2
Search…………………………………………………………………………………………………………………………………………55 14.3.2.3
Favourites………………………………………………………………………………………………………………………………….56 14.3.2.4
Playing Queue…………………………………………………………………………………………………………………………57 14.3.2.5
Playlists……………………………………………………………………………………………………………………………………….59 14.4
Equalisations………………………………………………………………………………………………………………………………………………61 14.4.1
Normal Mode ………………………………………………………………………………………………………………………………….. 61 14.4.2
Expert Mode……………………………………………………………………………………………………………………………………..63
3
14.4.3 Selecting a Sound Profile ……………………………………………………………………………………………………………..66
14.4.4 Renaming a Sound Profile ……………………………………………………………………………………………………………66
14.4.5 Deleting a Sound Profile ………………………………………………………………………………………………………………67
14.5 Profile…………………………………………………………………………………………………………………………………………………………..68
14.6 Choosing Your Speaker………………………………………………………………………………………………………………………..69
14.6.1 My Speaker and Speakers Nearby……………………………………………………………………………………………69
14.6.2 Speaker Info ……………………………………………………………………………………………………………………………………..70
14.7 Speaker Preferences………………………………………………………………………………………………………………………………71
14.7.1 Power Saver Standby Mode ……………………………………………………………………………………………………71
14.7.2 Power Saver Second Wake-Up Source…………………………………………………………………………….. 71
14.7.3 Do Not Disturb Standby LED ………………………………………………………………………………………………. 71
14.7.4 Do Not Disturb Start Up tone ……………………………………………………………………………………………..72
14.7.5 Speaker System Options Cable Mode ……………………………………………………………………………….72
14.7.6 Speaker System Options Inverse L/R Speakers………………………………………………………………72
14.7.7 KW-1 Power Mode ………………………………………………………………………………………………………………………..72 14.8
Volume ………………………………………………………………………………………………………………………………………………………..73 14.8.1
Volume Display Setting …………………………………………………………………………………………………………………73 14.8.2
Hardware Volume…………………………………………………………………………………………………………………………..74 14.8.3
Speaker Volume Sensitivity …………………………………………………………………………………………………………74 14.8.4
Maximum Volume …………………………………………………………………………………………………………………………..74 14.9
Performance ……………………………………………………………………………………………………………………………………………..75 14.9.1
Streaming Settings Audio Quality…………………………………………………………………………………………75 14.9.2
Network quality……………………………………………………………………………………………………………………………….75 14.10
Firmware Upgrade………………………………………………………………………………………………………………………………….77 14.10.1
Automatic Firmware Update after Onboarding…………………………………………………………………77 14.10.2
Automatic Firmware Check………………………………………………………………………………………………………..77 14.10.3
Manual Firmware Update…………………………………………………………………………………………………………….78 14.11
Application…………………………………………………………………………………………………………………………………………………79 14.11.1
Theme Settings Theme …………………………………………………………………………………………………………….79 14.11.2
Theme Settings Reset Home Screen ………………………………………………………………………………….79 14.11.3
Analytics Improve App/Speaker……………………………………………………………………………………………79 14.12
Support……………………………………………………………………………………………………………………………………………………….80
15. Cleaning and Maintenance ……………………………………………………………………………………… 81
16. Disposal …………………………………………………………………………………………………………………… 82 16.1 Disposing
of the Packaging ………………………………………………………………………………………………………………….82 16.2 Disposing
of the Speakers……………………………………………………………………………………………………………………82 16.3 Disposing
of the Battery ………………………………………………………………………………………………………………………82
17. FAQ and Troubleshooting ……………………………………………………………………………………… 83 17.1 Set-up
…………………………………………………………………………………………………………………………………………………………83 17.2 Playback and
Streaming ………………………………………………………………………………………………………………………..85 17.3
Troubleshooting ………………………………………………………………………………………………………………………………………87 17.4 LED
Indicators………………………………………………………………………………………………………………………………………….90
18. Appendix …………………………………………………………………………………………………………………. 94 18.1
Specifications…………………………………………………………………………………………………………………………………………….94 18.2
Speaker Connection Test…………………………………………………………………………………………………………………….96 18.3
Explanation of symbols……………………………………………………………………………………………………………………… 101
18.3.1 Warning Symbols…………………………………………………………………………………………………………………………. 101
18.3.2 Regional Symbols …………………………………………………………………………………………………………………………. 101
18.4 IR Command Codes……………………………………………………………………………………………………………………………103
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Table of Contents
Setting Up
Wi-Fi Streaming
1. Introduction
Thank you for choosing KEF wireless speaker system LSX II. Innovation is
what sets KEF apart from its competitors. For the last 60 years KEF has been
at the forefront of loudspeaker research and development, designing class-
leading speakers that have dealt with the challenges of reproducing the latest
musical formats, and reproducing them to the highest possible quality. This
legacy continues today with the LSX II, our compact, yet powerful speaker
system for the digital music era. The award-winning LSX just got an upgrade.
Building on the acoustic excellence of the original, LSX II adds the W2
streaming platform from LS50 Wireless II and adds both HDMI ARC and USB-C to
its already impressive connectivity suite. Room filling, natural sound, great
looks and `place anywhere’ size LSX II just makes HiFi easy. Please read and
follow this user manual carefully before using the speaker system.
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Setting Up
2. General Information
2.1 Reading and Storing the User Manual
This user manual accompanies the LSX II speaker system (hereafter referred to
as the “speakers”), and contains important information on setup and handling.
Before using your speakers, read this user manual and the safety information
(as a separate booklet) carefully. This particularly applies to the safety
information. Failure to do so may result in personal injury or damage to the
speakers.
Retain the user manual and safety information for further use. Make sure to
include the user manual and safety information when passing the speakers on to
third parties.
2.2 Signal Symbol/Word Definitions
The following symbols and signal words are used in this user manual.
WARNING!
This signal symbol/word designates a hazard with moderate risk, which may result in death or severe injury if not avoided.
NOTICE!
This signal word warns of possible damage to property.
This symbol provides you with useful additional information on handling and use.
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FAQ and Troubleshooting
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Setting Up
3. In the Box and Unpacking
Be very careful when opening the packaging. Follow the instructions on the
packaging to lift up the speakers from the sides to avoid damaging the Uni-Q
drivers.
×1 set
×1
×1
×2
×4
1. Take the speakers and accessories out of the packaging. 2. Check to make
sure that all parts are included, namely: · Speaker ×2 (Primary Speaker ×1,
Secondary Speaker ×1) · Remote control ×1 (with 2 AAA batteries) · Inter-
speaker cable ×1 (length: 3 m) · Power cable ×2 (length: 2 m, with country-
specific power plugs) · Printed materials: Quick Start Guide, Safety
Information,Warranty Information and
Fabric Cleaning Guide 3. Check whether the speakers or individual parts are
damaged. If this is the case, do
not use the speakers and contact your retailer.
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FAQ and Troubleshooting
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Setting Up
Wi-Fi Streaming
4. Setting Up LSX II
4.1 Selecting an Appropriate Router
The speakers must be “onboarded” to your Wi-Fi network (see chapter
“Onboarding”) for the best sound quality, wireless streaming and comprehensive
control. Technical Requirements of your Router
· Network standard: IEEE 802.11a/b/g/n/ac, IPv4, IPv6, · Frequency band: Dual-
band 2.4 GHz / 5 GHz
· A 5 GHz Wi-Fi network is recommended for stable streaming, especially for
hi-resolution music.
· Connecting to a guest, office or public network: Office, hotel, guest and
public networks often feature additional security or authentication methods
which may prevent the speakers from connecting. You may need the help of the
network administrator to configure the network to allow full functionality if
using these kinds of networks.
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Wi-Fi Streaming
4.2 Connecting to Power
1. Connect the power cables into the AC input connectors (A) on the back
panels of the Primary and Secondary Speakers.
2. Connect the power plugs into the power sockets/outlets. After successful
power connections, the LED indicator light of the Primary Speaker will blink
white and amber. The speakers are now ready to be “onboarded” to your personal
Wi-Fi network through the KEF Connect App (see chapter “Onboarding”).
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4.3 Onboarding
4.3.1 Installing the KEF Connect App
Install the KEF Connect App on your mobile device to get the speakers
“onboarded” to your Wi-Fi network.
1. Search “KEF Connect” in the App Store or Google Play Store to download and
install the KEF Connect App on your iOS* or Android* device.
2. Launch the KEF Connect App on your device and create a user account. You
may log in with your existing Facebook, Google or Apple account, or create a
new KEF account with your email address.
Requires iOS 14 or above. Refer to App Store for the latest requirements. **Requires Android 8 or above. Refer to Google Play for the latest requirements.
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4.3.2 Using iOS Devices
1. Make sure your mobile device is connected to the network you want to
onboard your speaker to.
2. Launch and login to the KEF Connect App on your mobile device. 3. Select
“LSX II” under “Speakers nearby”.
The speakers with the warning sign ( ) are not set up yet. Select the speakers
with this warning mark to get them “onboarded”. The speakers with the check
mark ( ) are ready for use. This icon will show for speakers already onboarded
or directly connected to the network via a cable. 4. Select your local Wi-Fi
network. Press “Next” to begin the onboarding process. You may rename the
speakers by tapping “Speaker name”. 5. The onboarding process will be done
automatically. Tap “Done” when the process is completed. [Step 35] · The LED
indicator light of the Primary Speaker illuminates white briefly and then
fades out when the speakers are successfully connected.
· After successful connection, you may be prompted if there is a new firmware
update available. Follow the instructions in the KEF Connect App to complete
the update process.
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Wi-Fi Streaming
4.3.3 Using Android Devices with Google Play Service
1. Make sure your mobile device is connected to your local Wi-Fi network. 2.
Launch and login to the KEF Connect App on your mobile device. 3. Allow the
app to access your device’s location when requested. 4. Select “LSX II” under
“Speakers nearby”.
The speakers with the warning sign ( ) are not set up yet. The speakers with
the check mark ( ) are ready for use. 5. Tap “Open Google Home” to proceed. If
your mobile device does not have Google Home, you will be prompted to download
and install the app on your device. [Step 35] 6. Tap “Set up LSX II” at the
top of the screen. 7. Tap “Add another home”. 8. Create a nickname for the
home and then tap “Next”.
[Step 68] Google Home will start to look for and connect to the speakers.
Follow the instructions on the screen to assign a use location (e.g home) and
connect the speakers to your local Wi-Fi network.
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9. When the process is completed, tap “Continue” to start using the KEF
Connect App. · The LED indicator light of the Primary Speaker illuminates
white briefly and then fades out when the speakers are successfully connected.
· After successful connection, you may be prompted if there is a new firmware
update available. Follow the instructions in the KEF Connect App to complete
the update process.
· The latest operations of the Google Home App may differ from the above.
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4.3.4 Using Android Devices without Google Play Service
1. Make sure your mobile device is connected to your local Wi-Fi network. 2.
Launch and login to the KEF Connect App on your mobile device. 3. Allow the
app to access your device’s location when requested. 4. Tap “Choose a Wi-Fi
network”. 5. Select your local Wi-Fi network and then tap “OK”.
[Step 35] 6. Input the password of your local Wi-Fi network and then tap
“Next”. The connection process will be done automatically.
7. If preferred, create a new name for the speakers and then tap “Next”. This
name will be used for Wi-Fi and Bluetooth connections.
8. Tap “Let’s start” to enjoy your speakers. [Step 68] 14
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· The LED indicator light of the Primary Speaker illuminates white briefly and
then fades out when the speakers are successfully connected.
· After successful connection, you may be prompted if there is a new firmware
update available. Follow the instructions in the KEF Connect App to complete
the update process.
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4.4 Speaker Placement and Connection
· The speakers should be placed on a flat and level surface that is free from
vibration. · The two speakers are distinguished between the Primary Speaker
and the Secondary
Speaker. By default, the Primary Speaker is the right channel and should be
placed on your right hand side as you face the speakers. For the best stereo
experience, soundstage and stable connection, place the speakers within 8
meters apart.
The left and right channels can be swapped through the KEF Connect App. See chapter “Speaker System Options Inverse L/R Speaker”.
· The optimum distance between the speakers and the listener will depend on
how far the Primary Speaker and the Secondary Speaker are separated, or vice
versa.Try to keep the same distance to the listener to form an equilateral
triangle.
A
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B
C
A = B = C
· The two speakers are already paired and will be automatically connected with
each other wirelessly (resolution: 48 kHz/24 bit). If you prefer a higher
resolution (96 kHz / 24 bit) or are experiencing frequent audio dropouts due
to interference, use the provided inter-speaker cable (length: 3 m) to link
the two speakers (see chapter “Back Panel”).
· If a longer inter-speaker cable is required, the K-Stream cable is
recommended.
Maximum Distance between the Two Speakers
Wireless Mode Wired Mode
Up to 8 meters. Note that RF interference, including Wi-Fi, Bluetooth,
microwaves and IoT devices, may reduce this distance.
Use the provided inter-speaker cable or connect with a shielded Cat-6 Ethernet
cable. The cable length should be within 10 meters.
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4.5 Installation Accessories
These accessories (sold separately) provide more installation options to suit
your listening environments. Please visit the KEF website for product details.
4.5.1 Wall Brackets
They offer a quick and elegant method of attaching the speakers to a wall and
are capable of rotating the speakers 90° to either side or down.
4.5.2 Desk Pads
They are ideal when using the speakers as a pair of desktop loudspeakers,
either side of a television, on a bookshelf or in a cabinet.
4.5.3 Floor Stands
They offer a perfect platform for the speakers to perform, featuring a cable
management system.
WARNING!
Be aware of the potential hazards from tipping or knocking the speakers off
the stands which may result in personal injury, or property damage.
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5. Connection and Control Interface
5.1 Front Panel
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Using KEF Connect App
Secondary Speaker
Primary Speaker
· An LED indicator light can be found on each speaker, below the Uni-Q driver
(speaker cone).
· The IR (infrared) receiver for the remote control can be found on the
Primary Speaker where the LED indicator light is located.
The LED indicator light of the Secondary Speaker only comes on when: · The
Secondary Speaker is initially connected to power and is working properly. The
LED indicator light will briefly come on orange and then go out. · An error
occurs. · During normal operation the LED indicator light on the Secondary
Speaker will not illuminate.
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FAQ and Troubleshooting
5.2 Back Panel
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Controls and connections are found on the back panel of each speaker, marked as shown.
R Factory reset button
P P/S pairing button B Bluetooth pairing button O Optical input jack U USB
port (type C)
Resets the speakers to the factory defaults (including network settings and
all EQ and system preferences). Press and hold the button until the indicator
light above the button blinks.
Re-establishes the connection between the Primary Speaker and the Secondary
Speaker if the connection is lost.
Enables Bluetooth pairing. The speakers will be ready to pair with a new
device. Any Bluetooth connected device will be disconnected.
Plays audio input from a source (e.g. Blu-ray player, cable box) through an
optical cable.
Plays audio input from a computer or charges KW-1 Wireless Kit. Requires
activation of the USB charging function in the KEF Connect App. The USB audio
input function will be disabled.
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X Auxiliary input jack
S Subwoofer output jack
V TV port
T Primary/Secondary connection port
N Network port A AC input connector
Plays audio input from a source (e.g. turntable with phono stage) through a
3.5 mm audio cable.
Connects a subwoofer to the speakers through an RCA cable.
Plays audio input from a source (e.g. ARC port of television) through an HDMI
cable.
Connects the Primary Speaker and Secondary Speaker with the inter-speaker
cable.
Connects the speakers to a router with a LAN cable. This port is colour-coded
yellow. Connects the speakers to the power source with the power cables.
5.3 Bottom Panel
· Rubber feet are found on the bottom panel of each speaker to prevent
slipping on a hard surface.
· Additionally, a threaded hole (1/420 UNC) is also available for mounting on
various accessories (see chapter “Installation Accessories”).
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5.4 LED Indications
The connection and operation status can be easily checked through the colours
and patterns of the LED indicator on the Primary Speaker.
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Pattern Blinking white and amber Solid amber
Solid white Solid green
Solid blue
Solid light blue Solid purple Solid pink Solid yellow
Status The speakers are ready to connect to a Wi-Fi network. Launch the KEF
Connect app to set up the speakers. The speakers are in Standby Mode and
connected to a Wi-Fi network. The speakers are operating in Wi-Fi Mode.
The speakers are operating in Spotify Connect Mode. The speakers are operating
in Bluetooth Mode and a device is already paired with the speakers. The
speakers are operating in TV Mode.
The speakers are operating in Optical Mode.
The speakers are operating in USB Mode.
The speakers are operating in AUX Mode.
*The LED indicator light illuminates briefly and fades out when there are no active interactions with the speakers (e.g. controlling playback or volume).
For a full list of colours and patterns, see chapter “LED Indicators”.
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5.5 Remote Control
On/off button
Previous source button Volume down button Previous button
Mute button Volume up button Next source button
Play/pause button Next button
· Insert two AAA batteries into the battery compartment before use.To do so,
slide open the battery compartment cover on the back and insert the batteries
into the compartment according to the polarity (+/). Close the battery
compartment cover when done.
· Point the remote control to the IR receiver located on the front panel of
the Primary Speaker. Make sure there are no obstacles between the remote
control and the Primary Speaker during use.
· If the remote control is less responsive or not working, the battery power
may be low. Replace the batteries to see if this is the case.
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5.6 KEF Connect App
The KEF Connect App allows you to set up the speakers, apply sound settings,
turn on/ off the speakers, switch sound sources, and access and play back your
streaming music and music stored in media server.
Latest news and stories from KEF
Turn on/off the speakers and switch sources
Shortcuts to music content (music streaming services, Internet radio stations,
podcasts and media server)
EQ settings Speaker settings Music content Remote control Home
For details, see chapter “Using KEF Connect App”.
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6. Wi-Fi Streaming
6.1 Wireless Streaming Protocols
To stream audio to the speakers, your mobile device must be connected to the
same Wi-Fi network as the speakers. The speakers can be turned on from standby
mode through all wireless streaming protocols.
6.1.1 AirPlay 2
AirPlay 2 lets you share audio output from Apple devices to the speakers.
1. Start music or video playback on your iOS device. 2. For music streaming,
tap the AirPlay icon ( ) in the playback screen.
For audio streaming from the YouTube app, tap the connection icon ( ) in the
playback screen and then tap the AirPlay icon ( ).
3. Select “LSX II” (or the name you have created for the speakers) from the
selection menu to start streaming. The availability for streaming depends on
the app compatibility.
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6.1.2 Chromecast
If your device is Chromecast-enabled, you can stream audio output from the
device to the speakers. 1. Start music or video playback on your Chromecast-
enabled device.
2. In the Google Home App, tap “LSX II” (or the name you have created for the
speakers).
3. Tap ” Cast my audio”.
· The availability for streaming depends on the app compatibility. · The
latest operations of the Google Home App may differ from the above.
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6.1.3 ROON Ready
Roon is a high quality music management system that pulls together music from
a NAS drive, locally stored music (i.e. on your computer), compatible
streaming services and Dropbox to create a searchable, surfable magazine about
your music. The speakers are certified “Roon Ready”. For more information on
Roon, visit roonlabs.com.
1. Enable the speakers in the Audio menu.
Note: KEF LSX II will be Roon Ready soon. 2. To stream music, click the “Zone
Picker” next to volume at the footer of Roon and
then select “KEF LSX II” (or the name you have created for the speakers) from
the device list.
3. The signal path can be found by clicking the little coloured light in the
footer.
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6.1.4 Music Streaming Apps Native Protocols 6.1.4.1 Spotify Connect
Spotify is a digital music and podcast streaming service that gives you access
to millions of songs and other content from artists all over the world. The
speakers are ready for Spotify Connect.
1. Browse and select music to play in the Spotify App. 2. Tap the device icon
( ) at the bottom of the playback screen. 3. Select “LSX II” (or the name you
have created for the speakers) from the selection
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6.1.4.2 QPlay QQ Music is one of China’s most popular online music streaming
services. QPlay lets you stream music directly from the QQ Music App. The
speakers are ready for the QPlay feature. 1. To stream music, launch the QQ
Music App and enable QPlay in the settings. 2. Browse and play music. 3. Tap
the QPlay icon ( ) on the playback screen.
4. Select “KEF LSX II” (or the name you have created for the speakers) from
the device list to start streaming.
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6.1.4.3 TIDAL Connect TIDAL is a subscription-based music, podcast and video
streaming service that combines lossless audio and high-definition music
videos with exclusive content and special features on music. The speakers are
ready for the TIDAL Connect feature for music streaming. 1. To stream music,
select the content you want to play in the TIDAL Connect App and
then select the connect icon ( ) in the “Now Playing” screen. 2. Select “LSX
II” (or the name you have created for the speakers) from the list of
nearby devices to pair with the Tidal Connect App to start streaming. [Step
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6.1.5 KEF Connect App Streaming
The KEF Connect App offers direct access to various music streaming services
for playback through the speakers. For details, see chapter “Playing Music
from Music Streaming Services” 6.1.5.1 Amazon Music
Amazon Music is a music streaming platform and online music store operated by
Amazon. You can access your Amazon Music account through the KEF Connect App
to stream music to the speakers. High-res audio is supported with Amazon Music
Unlimited subscription. 6.1.5.2 Deezer
Deezer is an online music streaming service. It allows users to listen to
music content from a wide range of record labels on various devices online or
offline. You can access your Deezer account through the KEF Connect App to
stream music to the speakers. 6.1.5.3 Qobuz
Qobuz is a music streaming and downloading service offering hi-resolution
streaming to its subscribers. You can access your Qobuz account through the
KEF Connect App to stream music to the speakers. 6.1.5.4 Spotify
Through the KEF Connect App, you will be prompted to open the Spotify app on
your device in order to stream music to the speakers. See chapter “Spotify
Connect”.
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6.1.5.5 TIDAL
TIDAL is a subscription-based music, podcast and video streaming service that
combines lossless audio and high-definition music videos with exclusive
content and special features on music. You can access your TIDAL account
through the KEF Connect App to play hi-resolution audio. A valid Hi-Fi tier
subscription is required. 6.1.5.6 Internet Radio The KEF Connect App offers
access to thousands of Internet radio stations from all over the world,
offering music, news and discussion. 6.1.5.7 Podcasts The KEF Connect App
provides access to a wide range of podcasts covering a huge number of genres
and topics.
6.1.6 UPnP Playback
You can play compatible music files stored in the music library of a connected
media server (e.g. NAS drive via uPnP). The media server must be on the same
network as the speakers.
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6.2 Tips on Choosing Streaming Protocols
Recommendations for the best wireless streaming options with regard to
music/media apps on your mobile devices.
App Spotify
Wireless streaming protocol
AirPlay 2 Chromecast ROON Music
KEF
Ready streaming Connect
app native App
protocol
Spotify
Connect
Bluetooth
TIDAL
TIDAL Connect
QQ Music Apple Music Amazon Music Deezer Qobuz Internet radio Audio podcast Youtube (audio) Youtube Music
QPlay
= Supported = Supported and recommended for the best audio quality and streaming stability. *Only available with a Youtube Music Premium account.
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7. Multi-Room Streaming
7.1 AirPlay 2
Apple Airplay 2 can extend the speakers to become part of a multi-room
wireless music system which can be controlled with iOS devices. If you have
more than one pair of AirPlay 2 speakers connected to the same network, select
the pairs for playback of the same audio output at the same time.
You can control the volume of the speakers individually or together as a
group. Note: Legacy AirPlay (AirPlay 1) speakers are not compatible with
multi-room streaming. For more support, visit Apple.
7.2 Chromecast
You can group the speakers and Chromecast devices together for synchronous
music throughout the home.
1. Make sure your mobile device is connected to the same Wi-Fi network or
linked to the same account as your speakers.
2. Open the Google Home App. 3. At the top left, tap “+” and then “Create a
speaker group”.
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4. Tap each device (including the sets of speakers) you want to add to the
group. A check mark will appear next to each device you have selected.
5. Tap “Next” 6. Enter a name for your group. 7. Tap “Save”.
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7.3 ROON
With Roon Ready certification, the speakers are compatible with Roon’s multi-
room streaming functionality. Roon supports “Zone Grouping”, or synchronizing
audio playback in several zones within your house. Note that “Zones” can only
be grouped with other zones of the same type (e.g. RAAT, AirPlay etc.).
1. To group zones, select the zone you are controlling in desktop and tablet
interface, by clicking the “Zone Picker” in the footer, next to volume. On a
phone, select by clicking “Switch Zone” below the volume pop-up.
2. Tap “Group Zones”.This brings up the available zones for grouping.
3. Select the desired zone(s) to be added and then tap “Save”.
The speakers in the grouped zones will stream the same audio output. For more
support, visit ROON.
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8. Voice Control Over Mobile Device
8.1 Siri
You can use Siri to control playback (e.g. skipping tracks, controlling the
volume level) while your iOS mobile device is streaming music to the speakers.
Hey Siri. Play some music on the LSX II.
8.2 Google Assistant
You can use Google Assistant to control playback (e.g. skipping tracks,
controlling the volume level) while your Android mobile device is streaming
music to the speakers.
Hey Google. Play some music on the
LSX II.
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9. Playback with Bluetooth
You can pair your Bluetooth devices (e.g. computers) with the speakers through
Bluetooth connection. The speakers must always be first connected to your
local network before Bluetooth connection.
9.1 Selecting Bluetooth Mode
· In the KEF Connect App, tap the Bluetooth button ( ) to switch to Bluetooth
mode.
· Alternatively, press the source button on the remote control. You can assign
the Bluetooth mode as a second wake-up source to turn on the speakers
automatically when there is audio input through Bluetooth connection. See
chapter “Power Saver Second Wake-Up Source”.
9.2 Bluetooth Pairing
1. In Bluetooth mode, check the LED indicator light of the Primary
Speaker.When the LED indicator light pulses blue, the speakers are in the
discovery mode and ready to pair with a Bluetooth device.
If the LED indicator light illumiates blue briefly and then fades out, the
speakers are already paired with a Bluetooth device. To disconnect the
connected Bluetooth device, short press the Bluetooth pairing button (B) on
the back panel of the Primary Speaker. The Bluetooth icon blinks slowly when
it is ready to pair with a new Bluetooth device.
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Alternatively, press the Bluetooth pairing icon located at the upper right corner of the remote control in the KEF Connect App to disconnect the paired device.
2. Turn on the Bluetooth feature of your device and select “KEF LSX II” (or
the name you have created for the speakers) from the list of available devices
to pair.
When Bluetooth pairing is done, the Bluetooth icon will stay lit.
The speakers remember your last paired Bluetooth device. Once Bluetooth mode
is selected, the speakers will automatically connect with your last paired
device if it is around.
9.3 Playback Controls
In the KEF Connect App, use the control elements below for playback controls.
The volume control, previous and next functions can also be operated on the
remote control.
Previous Shuffle
Volume control
Track scroll Next Repeat
Play/pause
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10. Playback with HDMI ARC input
The speakers are compatible with HDMI ARC (Audio Return Channel) output from
your TV for integrated control through a single HDMI cable. The speakers must
always be first connected to your local network before HDMI connection. The
speakers are also backward compatible with HDMI CEC. HDMI CEC allows the use
of the television remote control to adjust the volume of the speakers.
10.1 HDMI Cable Connection
Connect the HDMI output port of your TV and the TV port (V) on the back panel
of the Primary Speaker via an HDMI cable.
· Connect the HDMI cable to the ARC port of your TV. · In your TV setting,
turn on ARC or CEC in the HDMI settings. · Refer to the user manual of your TV
for details as manufacturers may name
the HDMI connections differently (e.g. Anynet+ for Samsung, Simplink for LG).
· Make sure the digital audio output setting for the television is set to PCM
(not Dolby, Bitstream, Auto or similar).
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10.2 Selecting TV Mode
· In the KEF Connect App, tap the TV Mode button (TV) to switch to TV Mode.
· Alternatively, press the source button on the remote control. · If no HDMI
cable is conected to the speakers and TV mode is selected, the LED
indicator light of the Primary Speaker pulses light blue.
· The LED indicator light of the Primary Speaker illuminates light blue
briefly and then fades out when HDMI connection is established. You can assign
TV mode as a second wake-up source to turn on the speakers automatically when
there is audio input through the HDMI connection. See chapter “Power Saver
Second Wake-Up Source”.
10.3 Playback Controls
All playback controls (except adjusting volume) must be done on the connected
device. The volume can also be adjusted on the remote control.
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11. Playback with Optical Input
You can connect your devices with optical output (e.g. TV and game consoles)
to the speakers through an optical cable. The speakers must always be first
connected to your local network before optical connection.
11.1 Optical Cable Connection
Connect the optical output jack of your device and the optical input jack (O)
on the back panel of the Primary Speaker via an optical cable.
Make sure your TV is set to output digital audio in PCM format. Refer to the
user manual of your TV for details.
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11.2 Selecting Optical Mode
· In the KEF Connect App, tap the Optical Mode button (OPT) to switch to
Optical Mode.
· Alternatively, press the source button on the remote control. · The LED
indicator light of the Primary Speaker illuminates purple briefly and then
fades out when Optical mode is selected.
You can assign Optical mode as a second wake-up source to turn on the speakers
automatically when there is audio input through the optical connection. See
chapter “Power Saver Second Wake-Up Source”.
11.3 Playback Controls
All playback controls (except adjusting volume) must be done on the connected
device. The volume can also be adjusted on the remote control.
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12. Playback with USB Input
You can connect your computer to the speakers through a USB (type C) cable.
The speakers must always be first connected to your local network before USB
connection. This feature is compatible with Mac and Windows PC, with a maximum
streaming quality of 192 kHz / 24 bit. Please note that Microsoft has ended
support for Windows 7 and Windows 8, and it is recommended to use Windows 10
or above for best USB audio experience. To adjust the audio resolution of a
Mac PC, go to “Utilities > Audio Midi Setup” and select the desired format.
12.1 USB Connection
Connect your computer and the USB port (U) on the back panel of the Primary
Speaker via a USB cable (type C).
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12.2 Selecting USB Mode
· In the KEF Connect App, tap the USB button (USB) to switch to USB mode.
· Alternatively, press the source button on the remote control. · The LED
indicator light of the Primary Speaker illuminates pink briefly and then fades
out when USB mode is selected.
You can assign USB mode as a second wake-up source to turn on the speakers
automatically when there is audio input through the USB connection. See
chapter “Power Saver Second Wake-Up Source.
12.3 Playback Controls
All playback controls (except adjusting volume) must be done on the connected
device. The volume can also be adjusted on the remote control.
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13. Playback with Auxiliary Input
You can connect your devices with 3.5 mm audio output (e.g. turntables,
computers, portable music players) to the speakers through an audio cable. The
speakers must always be first connected to your local network before auxiliary
connection.
13.1 Auxiliary Cable Connection
Connect the audio output jack of your device and the auxiliary input jack (X)
on the back of the Primary Speaker via a 3.5 mm audio cable.
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13.2 Selecting Auxiliary Mode
· In the KEF Connect App, tap the Auxiliary Mode button (AUX) to switch to
Auxiliary mode.
· Alternatively, press the source button on the remote control. · The LED
indicator light of the Primary Speaker illuminates yellow briefly and then
fades out when AUX mode is selected.
You can assign Auxiliary mode as a second wake-up source to turn on the
speakers automatically when there is audio input through the auxiliary
connection. See chapter “Power Saver Second Wake-Up Source”.
13.3 Playback Controls
All playback controls (except adjusting volume) must be done on the connected
device. The volume can also be adjusted on the remote control.
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14. Using KEF Connect App
The KEF Connect App allows you to set up the speakers, apply EQ settings, turn
on/ off the speakers, switch sound sources and access and play back your music
streaming services.
14.1 Home
14.1.1 Overview
Latest news and stories from KEF
Turn on/off the speakers and switch sources
Shortcuts to music content (music streaming services, Internet radio stations,
podcasts and media server)
EQ settings Speaker settings Music content Remote control Home
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14.1.2 Editing the Home Screen
You may edit the Home screen to show or hide tiles (e.g. Music in the Cloud)
or buttons that are of frequent or less frequent use.
1. Tap the edit icon ( ) at the top right of the app. 2. Tap the “+” or “”
symbols or drag and drop to show or hide a tile.
3. Tap the edit icon ( ) at the top right of a tile. 4. Tap the “+” or “”
symbols or drag and drop to show or hide a button in the tile.
14.2 Remote Control
· Use the buttons under “Remote Control” to directly turn on the speakers from
that particular source, or change the sound source.
· To turn off the speakers, tap the active source button.
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14.3 Music Content
The KEF Connect App allows you to access and play back music from your music
streaming services as well as Internet radio stations and podcasts.
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14.3.1 Playing Music from Music Streaming Services 14.3.1.1 Amazon Music
1. To stream music, tap “Amazon Music” under “Music in the Cloud” in the KEF
Connect App.
2. Login to your Amazon Music account.
3. Browse and play music to start streaming.
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14.3.1.2 Deezer 1. To stream music, tap “Deezer” under “Music in the Cloud” in
the KEF Connect App. 2. Login to your Deezer account. 3. Browse and play music
to start streaming.
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14.3.1.3 Qobuz 1. To stream music, tap “Qobuz” under “Music in the Cloud” in
the KEF Connect App. 2. Login to your Qobuz account.
3. Browse and play music to start streaming.
14.3.1.4 Spotify Through the KEF Connect App, you can be prompted to the
Spotify App on your device to stream music to the speakers. See chapter
“Spotify Connect”.
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14.3.1.5 TIDAL 1. To stream music, tap “TIDAL” under “Music in the Cloud” in
the KEF Connect App. 2. Login to your TIDAL account.
3. Browse and play music to start streaming.
In the KEF Connect App, there is a green or blue dot next to the MQA logo in
the Now Playing screen to indicate that the App is decoding and playing an MQA
stream or file, and denotes provenance to ensure that the sound is identical
to that of the source material. A blue dot indicates the App is playing an MQA
Studio file, which has either been approved in the studio by the artist/
producer or has been verified by the copyright owner.
MQA and the Sound Wave Device are registered trade marks of MQA Limited © 2016
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14.3.1.6 Internet Radio 1. To access Internet radio, tap “Radio stations”
under “Live Stream” in the KEF Connect
App. 2. Browse and play a radio station to start streaming.
14.3.1.7 Podcast 1. To access podcast contents, tap “Podcasts” under “Live
Stream” in the KEF Connect
App. 2. Browse and play a podcast to start streaming.
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14.3.2 Playback Controls
The below features are available to control playback or behaviour. Please note
that these features may not be available to all music sources and there may be
slight differences in the control interface.
14.3.2.1 Playback Screen
Hide playback screen
Queue
Track metadata MQA authentication type
Track scroll Shuffle
Volume control
Favourites Options
Previous/next Repeat Play/pause
14.3.2.2 Search
Tap the search icon ( ) to look for artists, albums or songs in the current
music source.
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14.3.2.3 Favourites · Selecting or Deselecting Favourites
In the playback screen, tap the favourite icon ( (music, podcast, radio
station) as favourites.
) to select or deselect an item
Alternatively, tap the option icon (…) next to an item (e.g. track, album, playlist), or press and hold on an item and then select “Add to Favourites” or “Remove from Favourites”.
· Accessing your favourites
To show the favourites in your current music source, tap “Favourites” in the
main menu.
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14.3.2.4 Playing Queue Adding a track to the queue means the track will be
played after the current playing track. The queue is not permanent and cannot
be saved.
· Adding a Track to the Queue 1. From the playback screen, tap the option icon
(…).
2. Select “Add to Queue” to add the track to the end of the Queue. Or select
“Play next” to add the track as the next song.
Depending on your selections, you can also add all tracks from an artist, all
tracks from an album, or all tracks from a playlist to the queue. · Showing
the Current Queue From the playback screen, tap the queue icon ( ) at the top
right.
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· Editing the Queue 1. To edit the playback sequence, press and hold the three
bars ( ) on the right hand side of a track and then drag the track up or down
the queue.
2. To remove a track from the queue, tap the edit icon ( ) at the top right.
3. Select the track in the queue and then tap the trash bin icon ( ) to remove
it
from the queue.You may also select multiple tracks for removal.
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14.3.2.5 Playlists A playlist is a list of tracks that can be played back in
the preferred sequential order. Playlists can be saved for future listening.
· Accessing the Playlists In the current music source, tap “Playlists” in the
main menu.
· Creating a Playlist 1. In the current music source, tap “Playlists” in the
main menu. 2. Tap “Create new playlist”.
3. Create a name for the playlist and then tap “Create”.
· Adding Tracks to a Playlist 1. From a list of tracks or from the playback
screen, tap the option icon (…) on the right
2. Tap “Add to playlist”.
3. Select the playlist you want to add the track to. Depending on your
selections, you can also add all tracks from an artist or all tracks from an
album to the playlist.
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· Editing a Playlist 1. In the playback screen of the track to be removed, tap
the option icon (…). 2. Tap “Remove from playlist”.
· Deleting a Playlist 1. In the playlist, tap the option icon ( ) at the top
right corner. 2. Tap “Delete playlist”.
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14.4 Equalisations
For the best audio performance, apply sound settings according to your
listening area.
14.4.1 Normal Mode
1. In the KEF Connect App, tap the EQ settings icon ( screen.
2. Tap “Add new profile”
) at the bottom of the Home
3. Select “Normal mode”. 4. Create a name for your new profile and then tap “Save”. 5. Configure the settings according to your listening area.
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· Installation location: On a stand or on a desk · Distance from the front
edge of the table (on a desk only) (> 50 cm to 0 cm)
· Distance to the wall (< 10 cm to > 50 cm)
· How is your room? (Damped / Moderate / Lively) Damped: Large furniture,
thick carpet and heavy curtains
Moderate: Medium furniture, thinner carpet or rug, some curtains and features
on walls
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Lively: Hard floor, less furniture, large windows and no curtains
· How large is the room? (< 20 m2 / 2040 m2 / > 40 m2) · Balance Control
(LCR) · Subwoofer is plugged in (No / Yes).
If a subwoofer is plugged in, set up the model, balance and volume of the
subwoofer. 6. Tap “Save” when the settings are done.
14.4.2 Expert Mode
1. In the KEF Connect App, tap the EQ settings icon ( screen.
2. Tap “Add new profile”.
) at the bottom of the Home
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3. Select “Expert mode”. 4. Create a name for your new profile and then tap
“Save”.
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5. The Expert Mode lets you configure the EQ preferences in greater
precision.
The settings include: · Desk Mode (On/Off, -10.0 dB to 0.0 dB) · Wall Mode
(On/Off, -10.0 dB to 0.0 dB) · Treble Trim (-4.0 dB to 4.0 dB) · Phase
Correction (On/Off) · Bass Extension (Less / Standard / Extra) · Balance
Control (LCR) · Subwoofer model · High-Pass Frequency (On/Off, 50 Hz to 120
Hz) · Sub Out Low-Pass Frequency (40 Hz to 250 Hz) · Sub Gain (-10 dB to 10
dB) · Sub Polarity (On/Off) · Are you using a KW-1? · Subwoofer delay (-10 ms
to 10 ms)
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Understanding the EQ Settings
On a desk/distance from the front edge of the table (Expert Mode: Desk Mode):
This setting adjusts the “presence” region (170 Hz +/- 1 octave). Too much
causes a muddy sound, while a lack of presence makes the sound distant and
empty.
Distance to the wall (Expert Mode: Wall Mode): This setting adjusts all
frequencies from around 500 Hz downwards, causing broader changes than Desk
Mode. A dip in these frequencies causes a tinny sound, while too much of these
frequencies can overwhelm the overall presentation with lower frequencies.
How is your room? (Expert Mode: Treble Trim): This adjusts the frequencies
above 500 Hz. A damped room (lots of curtains, soft furnishings) can make
sound seem muted, while a lively room (high ceiling, flat surfaces, glass) can
make it sound harsh. Move towards damped to reduce the muting effect, or move
towards lively to tame harshness.
How large is your room (Expert Mode: Bass Extension): This setting adjusts the
bass extension of the speakers. The larger the room selected, the lower the
roll-off point.
Balance Control: This setting allows you to adjust the volume balance between
the left and right channels.
Understanding the Subwoofer Settings
Subwoofer/Speaker Balance (Basic Mode): This controls the bass output between
the subwoofer and the speakers. If the slider is moved more to “Subwoofer”,
most of the bass output will be handled by the subwoofer.
High-Pass Frequency: Frequencies above the set point will be played by the
speakers.
Sub Out Low-Pass Frequency: Frequencies below the set point will be handled by
the subwoofer. This can overlap with the high-pass frequency to help integrate
the speaker/ subwoofer more effectively with no dip or peak in overall
response.
Sub Gain: This changes the signal level output to the subwoofer.
Sub Polarity: Ideally, the speakers and subwoofer should be moving in the same
direction at the same time, otherwise frequencies can be cancelled out.
Switching the polarity of the subwoofer can resolve a perceived lack of bass
response.
Are you using a KW-1?: KW-1 is a subwoofer adapter kit which transmits signals
wirelessly, enabling your subwoofer to be optimally placed. Enable this option
if you are using KW-1.
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14.4.3 Selecting a Sound Profile
1. In the KEF Connect App, tap the EQ settings icon ( ) at the bottom of the
Home screen.
2. Tap “Default” and then select a sound profile to apply to the speakers.
The profiles with a star icon are created in Expert mode.
14.4.4 Renaming a Sound Profile
1. In the selected EQ profile, tap the option icon ( ) at the top right. 2.
Tap “Rename profile”.
3. Create a new name for your profile and then tap “Save”.
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14.4.5 Deleting a Sound Profile
1. In the selected EQ profile, tap the option icon ( ) at the top right. 2.
Tap “Delete profile”.
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14.5 Profile
This menu allows you to edit your personal details (account name and profile picture) of your registered user account.
1. In the KEF Connect App, tap the Setting icon ( screen.
2. Tap “View profile”.
) at the bottom of the Home
3. Tap the edit icon ( ) at the top right and start editing.
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14.6 Choosing Your Speaker
14.6.1 My Speaker and Speakers Nearby
This menu allows the KEF Connect App to switch to another pair of speakers for
control and streaming. All speakers must first be set up through the same KEF
Connect App before they are available for selection.
1. In the KEF Connect App, tap the Setting icon ( ) at the bottom of the Home
screen.
2. Tap the name of the connected speakers.
3. Select another pair of speakers for control and streaming.
Current speakers Speakers on the same network but turned off Speakers on the
same network and ready for switching Not set up yet with KEF Connect App
Already set up with KEF Connect App on another mobile device The speakers
under “Speakers Nearby” are on the same network but not ready yet to be
controlled through the KEF Connect App on your mobile device.
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14.6.2 Speaker Info
This menu allows you to find out more information about the connected
speakers, rename the speakers and disconnect the speakers from the KEF Connect
App.
1. In the KEF Connect App, tap the Setting icon ( ) at the bottom of the Home
screen.
2. Tap the name of the connected speakers.
3. Tap the info icon ( ) next to the name of the speakers.
4. Check the MAC address, IP address and firmware version of the speakers.You
can also rename the speakers or forget the speakers (disconnect them from the
KEF Connect App).
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14.7 Speaker Preferences
This menu allows you to configure various speaker preferences. To access this
menu: 1. In the KEF Connect App, tap the Setting icon ( ) at the bottom of the
Home screen. 2. Tap “Speaker preferences”.
14.7.1 Power Saver Standby Mode
This setting determines how long (ECO (20), 30 or 60 mins) the speakers will
remain idle before automatically entering Standby Mode. If “never” is
selected, the speakers must be manually turned off.
14.7.2 Power Saver Second Wake-Up Source
This setting enables a second source to automatically turn on the speakers
when there is audio input from the selected source. This option is not
available when Standby Mode is set to ECO.
14.7.3 Do Not Disturb Standby LED
This setting enables the LED indicator light to turn off when the speakers are
in Standby mode.
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14.7.4 Do Not Disturb Start Up tone
This setting enables the start up tone to be muted when the speakers are
turned on.
14.7.5 Speaker System Options Cable Mode
You can connect the Primary Speaker and Secondary Speaker with the provided
interspeaker cable through the “T” connection ports on the back panels of the
speakers. Once the cable is connected, enable this setting to enable Cable
mode and disable the wireless connection.
Cable Mode is required/recommended when: · You prefer a higher resolution at
96 kHz/24 bit (wireless: 48 kHz/24 bit). · You are experiencing audio dropouts
due to interference.
14.7.6 Speaker System Options Inverse L/R Speakers
This setting changes which speaker plays left and right. By default, the
Primary Speaker plays the right channel.
14.7.7 KW-1 Power Mode
This setting switches the USB port of the Primary Speaker from audio input to
power output. Turn on this setting to enable the KW-1 transmitter to be power
by the speakers. Note that USB audio input will be disabled when this setting
is turned on.
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14.8 Volume
This menu allows you to configure volume settings. To access this menu: 1. In
the KEF Connect App, tap the Setting icon ( ) at the bottom of the Home
screen. 2. Tap “Volume”.
14.8.1 Volume Display Setting
This setting allows you to configure how the volume control should be
displayed.
· None: No volume control will be displayed during playback. · Slider:The
volume control will be displayed as a slider for adjustment.
Tap the speaker icon on the left to mute or restore audio output from the
speakers. · /+:The volume control will be displayed as “” and “+” buttons
for adjustment.
Tap the speaker icon in the middle to mute or restore audio output from the
speakers.
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14.8.2 Hardware Volume
This setting is only available on iOS devices. The hardware volume buttons
refer to the physical volume buttons on your device. Disable this setting when
you are experiencing conflicts with other music streaming apps over Wi-Fi
connection.
14.8.3 Speaker Volume Sensitivity
This setting allows you to configure the number of volume steps for each
single press of the physical volume buttons of your device.
14.8.4 Maximum Volume
This setting allows you to configure the maximum level when adjusting the
volume. The setting applies to all sources.
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14.9 Performance
This menu allows you to configure the streaming settings and assess your
network quality. To access this menu:
1. In the KEF Connect App, tap the Setting icon ( ) at the bottom of the Home
screen.
2. Tap “Performance”.
14.9.1 Streaming Settings Audio Quality
This setting allows you to select the audio quality for music streaming
services inside the KEF Connect app.
· Hi-Fi (Hi-Fi quality): Always select this setting for the best audio
quality.The highest quality depends on the music streaming service and your
subscription.
· High (CD quality): Select this setting when the speakers are in a crowded
network and experiencing quality drop-outs.
· Normal (MP3 quality): Select this setting when the speakers are in a crowded
network and experiencing audio drop-outs.
14.9.2 Network quality
This setting allows you to assess your network quality. For details, see
chapter “Speaker Connection Test”.
· Speaker connection test: Select this option to perform a network quality
check.
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· Test history: Select this option to review the test history. · Learn to
improve your connection: Select this option to access the KEF website for
tips on assessing and improving your network quality.
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14.10 Firmware Upgrade
14.10.1 Automatic Firmware Update after Onboarding
After you have successfully set up the speakers with the KEF Connect App, you
may be required to update the firmware if a new version is available. Follow
the instructions in the KEF Connect App to complete the update process.
14.10.2 Automatic Firmware Check
The speakers check the server every 4 hours if a new firmware update is
available. If a firmware is available, it will check if the firmware update is
compulsory or not. If a firmware update is compulsory, it will start the
update when:
· The speakers are in standby mode, or · The Wi-Fi source or Bluetooth source
has been idle for 60 minutes. If a firmware update is not compulsory, it will
be carried out when: · The speakers are in standby mode between 23 am, or ·
The Wi-Fi source or Bluetooth source has been idle for 60 minutes. A firmware
update will not occur when the speakers are in use.
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14.10.3 Manual Firmware Update
This menu allows you to manually check for firmware updates. To access this
menu:
1. In the KEF Connect App, tap the Setting icon ( ) at the bottom of the Home
screen.
2. Tap “Speaker update”. 3. If an update is available, tap “Update now” to
proceed with the firmware update.
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14.11 Application
This menu allows you to reset the home screen and send analytics. To access
this menu:
1. In the KEF Connect App, tap the Setting icon ( ) at the bottom of the Home
screen.
2. Tap “Application”.
14.11.1 Theme Settings Theme
This setting allows you to set a theme mode (System, Light or Dark).
14.11.2 Theme Settings Reset Home Screen
This setting allows you to reset the Home screen of the app to default
settings.
14.11.3 Analytics Improve App/Speaker
This setting allows the KEF Connect app to anonymously send improvement
analytics to KEF. We recommend this setting is enabled to help KEF to improve
product performance
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14.12 Support
This menu allows you to report issues, give suggestions and make general
enquiries. To access this menu:
1. In the KEF Connect App, tap the Setting icon ( ) at the bottom of the Home
screen.
2. Tap “Support”. 3. Select the type of support you need and proceed as
instructed on the screen.
4. When reporting an issue, your email program will automatically attach the
speaker logs that helps KEF investigate the issue. Please add a description of
the problem in the email message as well.
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15. Cleaning and Maintenance
WARNING!
Risk of electric shock! Improper cleaning of the speakers may result in
injury.
· Always unplug the power cables from the power sockets/outlets before
cleaning the speakers.
NOTICE!
Risk of short circuit! Water and other liquids that have penetrated the
housing may cause a short circuit.
· Make sure that no water or other liquids penetrate the housing of the
speakers. · Never immerse the speakers in water or other liquids.
NOTICE!
Risk of damage! Improper handling of the speakers may result in damage.
· Do not use any aggressive cleaners, brushes with metal or nylon bristles, or
sharp or metallic utensils such as knives, hard scrapers and the like. They
could damage the surface.
1. Disconnect the power cables of the speakers from the power sockets/outlets
before cleaning.
2. Clean the surfaces of the speakers with a clean lint-free cloth. If
necessary, use an alcohol-free cleaner (e.g. screen cleaner, eyeglass lens
cleaner) to remove stubborn stains.
3. To clean the Uni-Q drivers (speaker cones), use an anti-static cleaner and
a soft sponge. Be careful as the driver may be damaged if too much force is
used.
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16. Disposal
16.1 Disposing of the Packaging
Sort the packaging before you dispose of it. Dispose of paperboard, cardboard
and wrappings in accordance with your local guidelines.
16.2 Disposing of the Speakers
Old appliances may not be disposed of in the household waste! LSX II is an
electronic product and may not be able to be disposed of as household waste.
Please dispose of your speaker in accordance with the regulations in force in
your city or county. This ensures that old appliances are recycled in a
professional manner and reduces negative consequences.
16.3 Disposing of the Battery
Batteries may not be disposed of with household waste! As the end user you are
required by law to bring all batteries, regardless whether they contain
harmful substances or not, to a collection point run by the communal
authority or to a retailer, so that they can be disposed of in an
environmentally friendly manner. labeled with: Cd = cadmium, Hg = mercury,
Pb = lead
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17. FAQ and Troubleshooting
17.1 Set-up
1. How do I set up the speakers?
· First of all, a home Wi-Fi network is required.This is to ensure you can
enjoy the full range of features and keep the system up to date.
· Then, download the KEF Connect App from the App Store or Google Play Store
and install it on your mobile device. Follow the instructions in the KEF
Connect App to get the speakers connected (onboarded) to your home Wi-Fi
network.
2. What router specifications do the speakers support?
· IEEE 802.11a/b/g/n/ac, IPv4, IPv6, Dual-band 2.4 GHz / 5 GHz
· For better streaming stability, especially on hi-resolution music files, a 5
GHz Wi-Fi network with a router transmission speed of at least 1300 Mbps is
recommended.
· Office, hotel, guest and public networks often feature additional security
or authentication methods which may prevent the speakers from connecting.You
may need the help of the network administrator to configure the network to
allow full functionality if using these kinds of networks.
· LTE routers/mobile hotspots will work, but may also consume a significant
amount of battery power and mobile data.
3. Can I use a mesh router?
· Yes, we have tested the most popular mesh routers and they are working well
with the speakers. However, as there is not yet an industrial standard for
mesh routers, each manufacturer may have their own meshing technology. If your
mesh router does not work with the speakers, make sure you have updated your
router to the latest firmware or contact the manufacturer for solutions.
4. How far apart can I place the two speakers?
· Wireless: up to 8 meters apart depending on your network condition. A
congested network environment will have more interferences and may reduce this
distance.
· Wired: Cable length up to 10 meters.
· Optimal listening distance between the speakers and the listener will depend
on how far the Primary Speaker and Secondary Speaker are separated from each
other. Try to aim for approximately the same distance between the Primary
Speaker and Secondary Speaker and between the speakers and the listener.
5. How large a room can the speakers cover?
· 10100 m2
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6. Can I change the Primary Speaker as the left channel? · By default, the
Primary Speaker is the right channel and the Secondary speaker is
the left channel. After connecting the speakers to your home Wi-Fi network,
you can inverse the L/R channels in the KEF Connect App. 7. Do I need to pair
the two speakers? · No, the two speakers are already paired at the factory. If
you do not hear any sound from the Secondary Speaker, see chapter
“Troubleshooting”. 8. What is the purpose of the ethernet cable in the
packaging box? · Use this inter-speaker cable to connect the Primary Speaker
and Secondary Speaker if you prefer a higher sound reolution (96 kHz/24 bit),
or if the wireless connection between the speakers is not stable. After
connecting the inter-speaker cable, you must also enable Cable Mode in the KEF
Connect App. 9. Can I rename the speaker? · Yes, renaming can be done in the
KEF Connect App.This will change the name for both Wi-Fi and Bluetooth
connections.
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17.2 Playback and Streaming
1. Which is the best wireless streaming option for different apps?
· Recommendations for the best wireless streaming options with regard to
music/ media apps on your mobile devices.
App Spotify
Wireless streaming protocol
AirPlay 2 Chromecast ROON Music
KEF
Ready streaming Connect
app native App
protocol
Spotify
Connect
Bluetooth
TIDAL
TIDAL Connect
QQ Music Apple Music Amazon Music Deezer Qobuz Internet radio Audio podcast Youtube (audio) Youtube Music
QPlay
= Supported = Supported and recommended for the best audio quality and
streaming stability. *Only available with a Youtube Music Premium account.
2. Can I stream audio output from Youtube, Netflix and other media contents
to the speakers?
· You can stream through AirPlay, Chromecast or Bluetooth. Subject to changes
according to the platforms.
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3. Is the subwoofer output mono or stereo? · The output is mono. 4. How
should I set the speakers if I prefer to adjust the volume on an external
equipment (preamplifier, streamers/multi-room systems) rather than through the
KEF Connect App? · In the KEF Connect App: 1) In Settings, go to “Volume”,
change “Volume Display” to “-/+” 2) Select the relevant source input. 3)
Change the volume to 71. The source selection is now set to “Unity gain”.
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17.3 Troubleshooting
1. What should I do to set up the speakers to another network? · A factory
reset is necessary.This will clear the previous network settings and all EQ
and system preferences. For this purpose, press and hold the Reset button (R)
on the back panel until the LED light above the button blinks. 2. What should
I do if I cannot find my speakers in the network during set-up? · Make sure
the LED light of the Primary Speaker is blinking white and amber. The speakers
are ready to connect to a Wi-Fi network. · Wait for about 3040 seconds for
the speakers to be visible on the speaker list. · If you still cannot see the
speakers, make sure your mobile device, the speakers and the router are within
line of sight (the closer the better). · The speakers broadcast on Channel 2
(2.4 GHz band). If your router overlaps this channel, it may cause issues with
discoverability and connection. Go to your router settings and configure the
2.4 GHz channel to avoid overlapping with Channel 2. 3. How do I report a bug
or an issue? · In the KEF Connect App, go to “Settings” > “Support”.To let us
better understand the bug or issue, please provide a descriptive report. 4.
There is no sound from both speakers. · Check if the speakers are already
turned on and not muted. · Make sure you are playing the correct set of
speakers and have selected the correct sound source. · Check the volume level,
you may need to turn up the volume. 5. There is dropout from both speakers. ·
A congested network environment reduces bandwidth for music streaming, you
need to set up the speakers to a less crowded router channel. · Check if there
is a network problem. Perform the speaker connection test in the KEF Connect
App. · Change the audio streaming quality in the KEF Connect App to a lower
resolution. · A congested network or multiple wireless devices lead to high
interference.Try to minimize the interference around the speakers. If the
problem persists, connect the internet port of the speakers to the router.
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6. There is no sound from the Secondary Speaker. · Make sure the Secondary
Speaker is connected to power. · Check if the connection between the two
speakers is lost (the LED indicator light of
the Primary Speaker is blinking white and blue).
If the connection is lost, short press the P/S pairing button (P) on the back
panel of the Primary Speaker to re-establish the connection. Wait a while
until the connection is established. Note: Do not press the button for more
than 1 second. · If the problem persists, connect the speakers with the inter-
speaker cable and turn on Cable Mode in the KEF Connect App.
7. There is dropout from the Secondary Speaker. · If the speakers are
connected wirelessly, try to move them closer to each other. · If the problem
persists, connect the speakers with the inter-speaker cable and turn on
Cable Mode in the KEF Connect App. · A congested network or multiple wireless
devices lead to high interference.Try to
minimize the interference around the speakers.
8. The audio is out of sync with the picture when using the speakers with a
TV. · If available, try the video delay/lip sync function of your TV. · Use
HDMI/optical input, and try to avoid Bluetooth connection.There is an inherent
delay in the Bluetooth codec.
9. I have connected the speakers to the TV with an HDMI cable, why is there
no sound?
· Make sure the source is switched to TV for the speakers. · If the LED
indicator light of the Primary Speaker is blinking light blue, the HDMI
connection is not found. In this case, make sure that the HDMI cable is
connected to the ARC port of the TV.
If the LED indicator light of the Primary Speaker is pulsing light blue, only
CEC (not ARC) connection is established (TV may respond without sound). In
this case, do the following: · The HDMI CEC connection needs to be enabled on
the TV. As manufacturers
may name this connection differently (e.g. Anynet+ for Samsung, Simplink for
LG), please check the user manual of your TV on how to turn on HDMI connection
for your TV. Once the HDMI CEC connection is enabled, the LED indicator light
of the Primary Speaker illuminates light blue briefly and then fades out (both
CEC and ARC connections are now established).
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· If there is only no sound but everything else is working, please make sure
that the audio output of HDMI is set to PCM (this is often set to Dolby
Digital by default). As the settings menu of each TV manufacturer is
different, please refer to the user manual of your TV. Also check the settings
within the application in use (e.g. Netflix and Disney+) and make sure PCM is
selected.
· Change the HDMI cable (our internal tests found that HDMI cables of lower
quality may not be able to establish the connection) and make sure the HDMI
cable is properly connected.
· As a last resort, power cycle the TV (unplug the power cable from the TV and
wait about 10-15 seconds before plugging it back in) and try again. Smart TVs
are like phones and sometimes require a reboot.
· If the problem persists, please report the issue in the Support section of
the KEF Connect App for investigation. In the meantime, use the Optical
connection as a fall-back solution.
10. I have connected the speakers to the TV with an optical cable, why is
there no sound?
· Make sure your TV is set to output digital audio in PCM format. · If the
problem persists, try a different optical cable or connection option (e.g.
HDMI). 11. I cannot find a radio station or podcast in the KEF Connect App. ·
We are constantly updating and expanding our database for radio stations and
podcasts. Please use the Support function in the KEF Connect App and send us
the RSS link of the website. After verification, we will add it to our
database. 12. I cannot adjust the speaker volume. · Check if you have set a
maximum level for volume adjustment. · Check if you are connecting and
controlling the correct set of speakers in the network.
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17.4 LED Indicators
The connection and operation status can be easily checked through the colours
and patterns of the LED indicator lights on the Primary and Secondary
Speakers. Refer to the table below.
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Speaker Pattern
Primary
Blinking white and amber
Primary
Pulsing amber
Primary
Solid amber*
Primary
Blinking amber
Status
LSX II is ready to connect to a Wi-Fi network. Launch the KEF Connect app to
set up the speakers.
The speakers are in Standby Mode and trying to connect to a Wi-Fi network.
The speakers are in Standby Mode and connected to the Wi-Fi network.
The speakers are unable to connect to a Wi-Fi network.
· Make sure your router is turned on.
· Move the Primary Speaker closer to the router. If the problem persists,
connect the Primary Speaker to your router by a LAN cable.
· If this happens right after the network connection, it is likely that the
Wi-Fi password is incorrect. Perform factory reset (Press and hold the Reset
button (R) on the Primary Speaker until the LED light above the button blinks)
and try the connection process again.
Primary Primary Primary
Solid white Solid green Solid blue*
Primary
Pulsing blue
The speakers are operating in Wi-Fi mode.
The speakers are operating in Spotify Connect Mode.
The speakers are operating in Bluetooth Mode and a device is already paired
with the speakers.
The speakers are in the Bluetooth discovery mode and are ready to pair with a
Bluetooth device.
Primary
Solid light blue* The speakers are operating in TV Mode.
Primary
Pulsing light blue The speakers are connecting to a TV.
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Speaker Pattern
Status
Primary
Blinking light blue The speakers are not connected to a TV.
Primary
Solid purple*
The speakers are operating in Optical Mode.
Primary
Solid pink*
The speakers are operating in USB Mode.
Primary
Solid yellow*
The speakers are operating in AUX Mode.
Primary
Blinking white slowly The speakers are muted in Wi-Fi Mode.
Primary
Blinking blue slowly The speakers are muted in Bluetooth mode.
Primary Primary
Blinking light blue slowly
Blinking purple slowly
The speakers are muted in TV Mode. The speakers are muted in Optical Mode.
Primary Primary
Primary
Primary and
Secondary Secondary
Blinking pink slowly The speakers are muted in USB Mode.
Blinking yellow slowly
The speakers are muted in AUX Mode.
Blinking white and blue
The Primary Speaker is in wireless pairing mode searching for the Secondary
Speaker.
1. Make sure Cable Mode is disabled on the KEF Connect app (Settings >
Speaker preferences > Cable mode).
2. On the Secondary Speaker, press the (P) P/S Pairing button once.The
Secondary Speaker will search for the Primary Speaker for reconnection.
Blinking light blue and yellow
Cable Mode is enabled and the connection between the speakers is interrupted.
1. Make sure the inter-speaker cable is connected between the Primary Speaker
and Secondary Speaker.
2. Make sure the inter-speaker cable is inserted in the correct connection
ports: “(T) To P/S” on the Primary Speaker and Secondary Speaker.
No LED light
The Secondary Speaker is operating normally.
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Speaker Pattern
Status
The Secondary Speaker is in the wireless pairing mode searching for the Primary Speaker.
Secondary
Blinking white and blue
1. Make sure Cable Mode is disabled on the KEF Connect app (Settings >
Speaker preferences > Cable mode)
2. On the Primary Speaker, press the (P) P/S Pairing button once.The Primary
Speaker will search for the Secondary Speaker for reconnection.
System error.
1. Pull the power cables from both speakers.
2. Wait approximately 60 seconds.
Primary and
Secondary
Blinking red quickly
3. Plug the power cables back to both speakers.
4. The LED indicator of the Primary Speaker should be pulsing amber,
indicating that the speakers are attempting to connect to the network.
If the problem persists, please contact your KEF dealer.
Primary and
Secondary
Blinking red and amber slowly
Overheat protection is activated.
Primary and
Secondary
The firmware is being updated. Do not unplug
Blinking white, blue, the power cables until the firmware update is
light blue, purple, completed. If you encounter any issues during
pink and yellow the firmware update, do not interrupt the
alternately
process and contact your local representative or
contact your local KEF dealer.
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Speaker Pattern
Status
The firmware update process failed.
1. Unplug the power cables from both speakers.
Primary and
Secondary
Blinking red slowly
2. Wait approximately 60 seconds.
3. Plug the power cables back to both speakers. 4. Perform the firmware
update again on the
KEF Connect App.
If the problem persists, please send a log from the KEF Connect App (Settings
Support > Report issue).
Primary
Blinking red and light The Secondary Speaker is missing during
blue slowly
firmware update.
*The LED indicator light illuminates briefly and fades out when there are no active interactions with the speakers (e.g. controlling playback or volume).
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18. Appendix
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Wi-Fi Streaming
18.1 Specifications
Model
LSX II
Drive units
Uni-Q Driver Array: HF: 19 mm (0.75 in.) aluminium dome LF/MF: 115 mm (4.5 in.) magnesium/aluminium alloy cone
Frequency range (-6 dB) measured at 85 dB/1 m
49 Hz 47 kHz *Depends on EQ settings
Frequency response (±3 dB) 54 Hz 28 kHz
measured at 85 dB/1 m
*Depends on EQ settings
Amplifier output power (per speaker)
LF: 70 W HF: 30 W
Amplifier class (per speaker) LF: Class D HF: Class D
Max SPL measured at 1m 102 dB
Wireless streaming features
AirPlay 2 Google Chromecast ROON Ready UPnP Compatible Bluetooth 4.2
Streaming services
Spotify via Spotify Connect Tidal via Tidal Connect Amazon Music Qobuz Deezer QQ Music via QPlay Internet Radio Podcast *Depends on services availability in different countries
Source resolution
Network up to 384 kHz / 24 bit Optical up to 96 kHz / 24 bit USB Type C up to 192kHz/24bit HDMI up to 1.411 Mbps PCM *Depends on source resolution
Interspeaker connection
Wireless: all sources resampled to 48 kHz / 24 bit PCM Wired: all sources resampled to 96 kHz / 24 bit PCM
Supported format (network) MQA, DSD, FLAC, WAV, AIFF, ALAC, AAC, WMA, MP3, M4A, LPCM and Ogg Vorbis
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Dimensions (H x W x D per speaker)
240 × 155 × 180 mm (9.5 × 6.1 × 7.1 in.)
155 mm 180 mm 240 mm
Weight (per set) Power input Power consumption
7.1 kg (15.6 lbs)
100240 VAC 50/60 Hz
200 W (operating power) < 2.0 W (standby power)
Inputs
Output Wi-Fi network standard Wi-Fi network frequency band
Primary Speaker
HDMI ARC TOSLINK Optical USB Type C Analog 3.5 mm Auxiliary RJ45 Ethernet
(network) RJ45 Ethernet (interspeaker)
RCA Subwoofer output
IEEE 802.11a/b/g/n/ac IPv4, IPv6
Dual-band 2.4 GHz / 5 GHz
Secondary Speaker RJ45 Ethernet (interspeaker)
MQA and the Sound Wave Device are registered trade marks of MQA Limited © 2016
Wireless performance depends on many factors, including network traffic,
distance from access point, room materials and construction, interference and
other adverse conditions. For further information and troubleshooting, please
visit the KEF website: KEF.COM KEF reserves the right, in line with continuous
research and development, to amend or change specifications without prior
notice. E. & O.E
The Bluetooth word mark and logos are registered trademarks owned by Bluetooth
SIG, Inc.
Amazon Music is a registered trademark of Amazon.com Inc.
Apple and AirPlay are registered trademarks of Apple Inc., registered in the
U.S. and other countries.
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Deezer is a registered trademark of Access Industries. Google Play store and Chromecast are registered trademarks of Google LLC.
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MQA and the Sound Wave Device are registered trade marks of MQA Limited © 2016
Qobuz is a registered trademark of Xandrie SA. QQ Music is a registered
trademark of Tencent Music Entertainment Group (TME).
ROON is a registered trademark of Roon Labs LLC or Roon Labs’s licensors.
Spotify is a registered trademark of Spotify AB. TIDAL is a registered
trademark of Aspiro AB.
18.2 Speaker Connection Test
The speaker connection test in KEF Connect shows you how much network
bandwidth is available to your KEF wireless speaker system. It considers every
stage of your network by downloading a file from a random server to the
speakers from the bandwidth provided by your internet service provider (ISP)
and server traffic, all the way to the speed of the connection between your
router and speakers. The other value shown is the `ping.’ This is a signal we
use to check if the server is reachable and tells us how long it takes.
What speeds are needed for different services?
Different music streaming services have different recommendations depending on
the audio file sizes involved:
Service Tidal (Master tier) Amazon Music (Ultra HD) Amazon Music (HD)
Deezer Qobuz
Minimum Recommended Bandwidth 2 Mbps
5-10 Mbps 1.5 2 Mbps
5 Mbps 10 Mbps
Note that these are minimum dedicated speeds recommended by the services themselves. KEF recommends 13 Mbps or above dedicated bandwidth to ensure stable streaming of large high resolution music files.
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What this means is that your total network bandwidth must exceed the total
bandwidth requirements of all devices on the network. If your active network
devices need more bandwidth than what is available, then you may experience
slower speeds, reduced performance and dropouts. This is not as much of a
problem for web browsing or file downloads (except for being slower) but is
especially problematic for music streaming.
My test score is a lot lower than what I pay my ISP for. Why?
The bandwidth provided by your ISP (Internet Service Provider) is advertised
as up to’ as this is the maximum bandwidth you can expect coming into your network. This can be affected by many things such as the quality of the provider’s cabling,Fair Use’ clauses in the agreement and the amount of
people accessing the same server.
But even if you get the maximum advertised bandwidth from your ISP, the home
network may be creating a bottleneck. Major factors include interference,
obstructions and distance between the router and device. Even time of day can
have an effect if more people are using the internet in your area, that can
reduce bandwidth. However, there are some simple things to try that can really
help improve your test score.
Why is the score lower than other tests?
Internet connectivity tests are often optimised to give you a theoretical
`best scenario’ speed and can be a good indicator for what your ISP is
providing but will not tell you specifically what bandwidth your KEF speaker
system will be able to take advantage of. The KEF Connect speaker connection
test more closely represents what happens when using the speaker system
normally:
KEF Connect
Server used for Random (Real world situation) test
Number of Connections
opened
One (Works as your KEF speaker system would)
File(s)
KEF speaker system (Factors
downloaded to… in the quality of the system’s
connection to the network)
Other
Nearest possible (Optimised, unrealistic)
As many as possible (Artificially maximises your network throughput)
Phone/Computer (May be in a higher/lower quality network
area)
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Improving your network experience
There are a few ways in which bandwidth may be improved. Some are very simple
and require no knowledge of computers and routers, whilst others are slightly
more advanced, involving changing router settings. Always refer to the router
manual, and if in doubt, do consult a professional.
First, it is important to determine how your speaker system is connected to
your router wired by Ethernet cable or connected wirelessly.
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If connected by Ethernet cable: 1. Ensure the router firmware is updated.
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This is a basic step for any electronic device, as updated firmware may
address known bugs.
2. Reboot the router.
Routers are basically computers and are affected by the same problems. Bugs
and temporary errors can cause too much memory being used, or the router can
be overheating (one reason to not place it in an enclosed space!). In
addition, there may be IP address conflicts. Rebooting the router will often
help with these issues. In fact, rebooting the router should be done on a
regular basis, or whenever network performance is slower. Some routers even
have the option to schedule reboots, so you can `set and forget.’
3. Check the cable for damage/excessive kinks.
Setting Up
Cable length for home networks is rarely an issue (Cat 6 Ethernet can carry 10
Gbps over 37 m/121 ft for example), but if they are bent too far or damaged,
performance can be compromised.
4. Reconsider using `network homeplugs’ if you are doing so.
Wi-Fi Streaming
These devices use your mains wiring as an extension of an Ethernet cable. Whilst a convenient solution, they don’t always work as expected, as they are highly dependent on the quality and topology of your mains wiring.
If connected wirelessly:
Basic
Using KEF Connect App
Steps to take if using a wireless connection. These steps do not involve
changing the settings of your router:
1. Ensure the router firmware is updated.
This is a basic step for any electronic device, as updated firmware may
address known bugs.
2. Reboot the router.
FAQ and Troubleshooting
Routers are basically computers and are affected by the same problems. Bugs
and temporary errors can cause too much memory being used, or the router can
be overheating (one reason to not place it in an enclosed space!). In
addition, there may be IP address conflicts. Rebooting the router will help
with all these issues and should be performed periodically (every 2 months or
whenever the network seems considerably slower than normal).
3. Try connecting with an Ethernet cable to your router.
This may not always be possible, but if it is, going cabled will eliminate the issues
described below.
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4. Reduce distance between the router and device.
Wi-Fi signal is like sound the further you move away from it, the quieter’ it is the less bandwidth is available. 5\. Move transmitting devices away from the speakers. Transmitting devices such as cordless phones, Bluetooth devices, baby monitors and even routers can cause interference if too close. You can troubleshoot by turning off nearby transmitters and seeing if this improves the network performance of the KEF speaker system. If it does, try increasing the distance between the devices. 6\. Reduce obstructions between the router and device. And just like with distance, obstructions can block signal, reducing bandwidth. Metal is the worst offender (reinforced concrete, back of mirrors), followed by concrete, plaster and brick. This is one of the big reasons to get the router out of the basement, or the cupboard under the stairs. 7\. If your router is in a different room, try switching to the 2.4 GHz band. Most modern routers are dual band. This means they transmit on both the 2.4 GHz band and the 5 GHz bands. The 5 GHz band has higher potential bandwidth, but far shorter range and is highly affected by obstructions. It may be possible that, whilst the 2.4 GHz band has a lower total bandwidth, in practice it is a better choice when the router and speakers are not in the same room. 8\. If you have a lot of neighbours, or a lot of network devices, try the 5 GHz band. If you have a lot of devices on the 2.4 GHz band, then there may be little available bandwidth left. If your KEF speaker system is close to the router and has little to no obstructions, try connecting it to the 5 GHz band for more bandwidth. If there are obstructions, try migrating network devices that are closer to the router to the 5 GHz band instead, freeing up bandwidth on the 2.4 GHz band. This is also useful if you have a lot of neighbours close by, as their networks may be interfering with yours. Advanced These steps are a little bit more advanced and may involve changing router settings. Always follow your router manual, or consult a professional: 1\. Change your band channels. Both 2.4 GHz and 5 GHz bands are comprised of multiple channels. Other nearby networks on the same channels will compete for bandwidth, so use anetwork
analyser’ app to determine which channels are less congested and adjust in
your router settings. This issue is more common with 2.4 GHz due to the longer
range and lower bandwidth, increasing the chance and severity of interference.
2.4 GHz channels also overlap good options are generally 1, 6 and 11.
Channel selection is
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often set to auto,’ but some routers are better at swapping channels than others, so it can be useful to set the channel manually. A note on 5 GHz channels not all channels are open for public use in various countries. Check with your local authority as to which channels are unrestricted (most routers will automatically turn these off if the router is correctly configured for the country). 2\. Disable band steering. Some routers offer a feature calledband steering.’ The idea is that the
router will automatically place a device onto the 5 GHz or 2.4 GHz depending
on which is best for that device at the time. Again, some routers are better
at this than others, with some preferring to stick with a weaker 5 GHz network
rather than switching to a stringer 2.4 GHz network.
3. Disable combined SSID and operate separate 2.4 GHz and 5GHz channels.
Some devices allow you to set the same name/password for both 2.4 GHz and 5
GHz channels of your router. This can be very useful, but some devices do seem
to want to default connecting to 2.4 GHz when 5 GHz would be better, and vice
versa. Maintaining separate 2.4 GHz and 5GHz networks will help with
optimising bandwidth by allowing you to manage what devices are placed on
which network.
Mesh networks and Wi-Fi extenders
Mesh networks and Wi-Fi extenders can be very useful tools to improve network
coverage in the home. However, they must be planned and installed correctly
for the best performance. The information below is a summary of mesh network
considerations – for more technical details or assistance in setting up a mesh
network, please refer to the manufacturer or an expert network device
retailer.
The most important thing to remember is that they are effectively repeaters
they receive data from the router, and then pass it on to the next node or
device. This adds latency (delay), but they are also limited by available
bandwidth the connection between a router and a node is subject to the same
issues outlined earlier distance, obstructions and interference.
So, when designing a mesh network or planning where to place Wi-Fi extenders,
budget for more nodes than you think you need, and place them closer together.
This will help maximise the potential bandwidth.
It is also worth noting that different router manufacturers handle mesh
technology differently, and there may be compatibility issues with networked
devices. If this is the case when using a KEF wireless speaker system, please
send a support request, including the speaker logs, through the KEF Connect
app.
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18.3 Explanation of symbols
18.3.1 Warning Symbols
The lightning flash with arrowhead symbol, within an equilateral triangle, is
intended to alert the user to the presence of uninsulated “dangerous voltage”
within the products enclosure that may be of a sufficient magnitude to
constitute a risk of electrical shock to persons. The exclamation mark 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 appliance.
18.3.2 Regional Symbols
Europe and North America
This marking indicates that this product should not be disposed with other
household wastes throughout the EU. To prevent possible harm to the
environment or human health from uncontrolled waste disposal, recycle it
responsibly to promote the sustainable reuse of material resources. To dispose
of your used device, please use the proper collection system or contact the
retailer where the product was purchased, they may be able to take the product
for environmentally safe recycling. Products marked with this symbol meet all
applicable Community regulations for the European Economic Area.
This UL symbol means UL found that representative product samples met UL’s
requirements (Canada, United States).
This UL Energy Certification Mark symbol means UL has certified that the
product meets the requirements for energy efficiency and is consistent with
technical and legal requirements of the United States and Canadian markets.
This FCC mark certifies that the electromagnetic interference from the device
is under the limits approved by the Federal Communications Commission in the
US.
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Asia-Pacific
The Regulatory Compliance Mark (Australia, New Zealand) indicates that the
product complies with the relevant guidelines of the ACMA as well as
corresponding government requirements for the safety of electrical devices.
The symbol indicates that the product meets the specified safety requirements
of Singapore Consumer Protection Registration Scheme.
The Japan PSE Mark Certification indicates that the product meets the
technical requirements of the Electrical Appliance and Material Safety Law
(DENAN).
These marks indicate compliance with technical and design requirements for
telecommunication terminal equipment in Japan.
The Korean Certification mark indicates that the product complies with Korea’s
product safety requirements for electrical and electronic equipment.
The China Compulsory Certificate mark indicates that the product meets the
safety requirements of the Chinese national standards (Guobiao).
The product is only suitable for use in areas under 2,000 m above sea level
(China).
RoHS (China): This product contains certain hazardous substances and can be
used safely during its environmental friendly use period (10 years). The
product should enter into the recycling system after its environmental
friendly use period.
RoHS (Taiwan): This symbol means that the product does not exceed the
specified concentration limits for specific hazardous substances.
The product obtained the certification from the Taiwan National Communications
Commission (NCC) for low-power radio frequency appliances.
This MCMC certification mark indicates that a communications device is
certified for compliance to standards according to the Communications and
Multimedia (Technical Standards) Regulations 2000 in Malaysia.
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18.4 IR Command Codes
LSX II works with universal programmable remote control provided that the
remote control manufacturers have implemented KEF IR command codes in their
remote controls.
The following table lists the command codes required.
Code Format: Factory Code:
NEC 0x01
Functions 1 Power on/off toggle 2 Mute/un-mute toggle 3 Play/Pause 4 Forward 5 Next source 6 Volume up 7 Volume down 8 Backward 9 Power ON 10 Power OFF 11 Mute 12 Un-mute 13 Source: Wi-Fi 14 Source: Bluetooth 15 Bluetooth pairing 16 Source: AUX 17 Source: Optical 18 Preset volume (30 %) 19 Source: HDMI 20 Source: USB 21 Previous source
Function codes 0x40 0x20 0x18 0x52 0x58 0x60 0xA0 0xD2 0x38 0x3A 0x48 0x4A
0x30 0x2A 0x98 0x02 0x0A 0x78
0x88 / 0x8A 0x1A 0xD0
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For more support, please visit kef.com
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References
Read User Manual Online (PDF format)
Read User Manual Online (PDF format) >>