KEF LS50 Wireless II User manual
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Table of Contents
1. Introduction ...............................................................................................................................5
2. General Information.................................................................................................................6
2.1 Reading and Storing the User Manual......................................................................................................................6
2.2 SignalSymbol/WordDenitions..................................................................................................................................6
3. In the Box and Unpacking.......................................................................................................7
4. Setting Up LS50 Wireless 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
5. Connection and Control Interface.....................................................................................17
5.1 Front Panel................................................................................................................................................................................17
5.2 Back Panel..................................................................................................................................................................................18
5.3 Bottom Panel...........................................................................................................................................................................20
5.4 Top Panel ...................................................................................................................................................................................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
6.1.5 KEF Connect App Streaming..............................................................................................................................29
6.1. 5.1 TIDAL ......................................................................................................................................................................29
6.1.5.2 Amazon Music...................................................................................................................................................29
6.1.5.3 Deezer.....................................................................................................................................................................29
6.1.5.4 Qobuz......................................................................................................................................................................29
6.1.5.5 Spotify......................................................................................................................................................................30
6.1.5.6 Internet Radio....................................................................................................................................................30
6.1.5.7 Podcast....................................................................................................................................................................30
6.1.6 UPnP Compatible .......................................................................................................................................................30
6.2 Tips on Choosing Streaming Protocols ................................................................................................................31
7. Multi-Room Streaming...........................................................................................................32
7.1 AirPlay 2......................................................................................................................................................................................32
7.2 Chromecast..............................................................................................................................................................................32
7.3 ROON .........................................................................................................................................................................................34
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8. Voice Control Over Mobile Device .................................................................................. 35
8.1 Siri....................................................................................................................................................................................................35
8.2 Google Assistant...................................................................................................................................................................35
9. Playback with Bluetooth ...................................................................................................... 36
9.1 Selecting Bluetooth Mode..............................................................................................................................................36
9.2 Bluetooth Pairing ..................................................................................................................................................................36
9.3 Playback Controls.................................................................................................................................................................37
10. Playback with HDMI eARC input ...................................................................................... 38
10.1 HDMI Cable Connection...............................................................................................................................................38
10.2 Selecting TV Mode..............................................................................................................................................................39
10.3 Playback Controls.................................................................................................................................................................39
11. Playback with Coaxial Input................................................................................................ 40
11.1 Coaxial Cable Connection............................................................................................................................................40
11.2 Selecting Coaxial Mode ...................................................................................................................................................41
11.3 Playback Controls.................................................................................................................................................................41
12. Playback with Optical Input .................................................................................................42
12.1 Optical Cable Connection.............................................................................................................................................42
12.2 Selecting Optical Mode....................................................................................................................................................43
12.3 Playback Controls.................................................................................................................................................................43
13. Playback with Auxiliary Input ............................................................................................. 44
13.1 Auxiliary Cable Connection.........................................................................................................................................44
13.2 Selecting Auxiliary Mode................................................................................................................................................45
13.3 Playback Controls.................................................................................................................................................................45
14. Using KEF Connect App ...................................................................................................... 46
14.1 Home ............................................................................................................................................................................................46
14.1.1 Overview...........................................................................................................................................................................46
14.2 Remote Control....................................................................................................................................................................47
14.3 Music Contents......................................................................................................................................................................47
14.3.1 Playing Music from Music Streaming Services........................................................................................48
14. 3.1.1 Amazon Music ...................................................................................................................................................48
14.3.1.2 Deezer.....................................................................................................................................................................49
14.3.1.3 Qobuz......................................................................................................................................................................50
14.3.1.4 Spotify......................................................................................................................................................................51
14.3.1.5 Tidal ...........................................................................................................................................................................51
14.3.1.6 Internet Radio....................................................................................................................................................52
14.3.1.7 Podcast....................................................................................................................................................................52
14.3.2 Playback Controls........................................................................................................................................................53
14.3.2.1 Playback Screen ................................................................................................................................................53
14.3.2.2 Search ......................................................................................................................................................................53
14.3.2.3 Favourites..............................................................................................................................................................54
14.3.2.4 Playlists....................................................................................................................................................................55
14.4 Equalizations.............................................................................................................................................................................57
14.5 Prole............................................................................................................................................................................................59
14.6 Choosing Your Speaker...................................................................................................................................................60
14.6.1 My Speaker and Speakers Nearby..................................................................................................................60
14.6.2 Speaker Info ...................................................................................................................................................................61
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14.7 Speaker Preferences...........................................................................................................................................................62
14.7.1 Power Saver – Standby Mode ...........................................................................................................................62
14.7.2 Power Saver – Second Wake-Up Source.................................................................................................62
14.7.3 Do Not Disturb – Top Panel Lock ................................................................................................................62
14.7.4 Speaker System Options – Cable Mode....................................................................................................63
14.7.5 Speaker System Options – Inverse L/R Speakers................................................................................63
14.8 Volume.........................................................................................................................................................................................64
14.8.1 Volume Display Setting ...........................................................................................................................................64
14.8.2 Hardware Volume ......................................................................................................................................................64
14.8.3 Speaker Volume Sensitivity ..................................................................................................................................65
14.8.4 Maximum Volume.......................................................................................................................................................65
14.8.5 Balance Control............................................................................................................................................................65
14.9 Firmware Upgrade..............................................................................................................................................................66
14.9.1 Automatic Firmware Update..............................................................................................................................66
14.9.2 Manual Firmware Update......................................................................................................................................66
14.10 Application................................................................................................................................................................................67
14.10.1 Streaming Settings – Audio Quality...............................................................................................................67
14.10.2 Analytics – Improve App/Speaker..................................................................................................................67
14.11 Support........................................................................................................................................................................................68
15. Cleaning and Maintenance ....................................................................................................69
16. Disposal .....................................................................................................................................70
16.1 Disposing of the Packaging............................................................................................................................................70
16.2 Disposing of the Speakers..............................................................................................................................................70
16.3 Disposing of the Battery.................................................................................................................................................70
17. FAQ and Troubleshooting ....................................................................................................71
17.1 Set-up ..........................................................................................................................................................................................71
17.2 Playback and Streaming....................................................................................................................................................73
17.3 Troubleshooting ....................................................................................................................................................................74
17.4 LED Indicators........................................................................................................................................................................77
18. Appendix.................................................................................................................................. 79
18.1 Specications...........................................................................................................................................................................79
18.2 Explanation of symbols ....................................................................................................................................................82
18.2.1 Warning Symbols ........................................................................................................................................................82
18.2.2 Regional Symbols.........................................................................................................................................................82
18.3 IR Command Codes ..........................................................................................................................................................84
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Table of ContentsSetting UpWi-Fi StreamingUsing KEF Connect AppFAQ and Troubleshooting
1. Introduction
Thank you for choosing KEF wireless speaker system – LS50 Wireless II.
Innovation is what sets KEF apart from its competitors. For over 50 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
LS50 Wireless II, our compact, yet powerful speaker system for the digital music era.
The new KEF LS50 Wireless II is a fully active wireless stereo system that delivers pristine,
KEF sound coupled with instinctive usability and high-performance wireless capability.
Completelyreengineeredandcapableofplayinganysourceseamlessly,LS50WirelessII
is the only hi-fi system you will ever need, contained within two perfectly proportioned,
precision-made cabinets.
Please read and follow this user manual carefully before using the speaker system.
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2. General Information
2.1 Reading and Storing the User Manual
This user manual accompanies the LS50 Wireless 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 signal word provides you with useful additional
information on handling and use.
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3. In the Box and Unpacking
NOTICE!
Risk of damage!
Using a sharp knife or other pointed object to open the packaging may damage the
speakers.
• 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 (speaker
cones).
×2
×1 ×1 ×2 ×3
1. Take the speakers and accessories out of the packaging.
2. Remove the red protective stickers and tabs on the speakers.
3. 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 and Warranty Information
4. Check whether the speakers or individual parts are damaged. If this is the case, do not
use the speakers. Contact your retailer via the contact information indicated on the
warranty information.
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4. Setting Up LS50 Wireless II
4.1 Selecting an Appropriate Router
The speakers must be “onboarded” to your personal Wi-Fi network (see chapter
“Onboarding”) for the best sound quality, comprehensive control and to enjoy music
streaming,
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: The speakers are designed
to work with a home Wi-Fi network. In guest, office and public networks,
additional security or authentication methods are commonly introduced
which may prevent the speakers from connecting. You may need the help of
the network administrator to configure the network if the speakers are to be
connected to these networks.
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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 Wi-Fi icon on the top panel of the Primary
Speaker will blink white and amber. The speakers are now ready to go “onboarded”
to your personal Wi-Fi network through the KEF Connect App (see chapter
“Onboarding”).
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Table of ContentsSetting UpWi-Fi StreamingUsing KEF Connect AppFAQ and Troubleshooting
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 personal 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
login with your existing Facebook, Google or Apple*** account, or create a new KEF
account with your email address.
*Requires iOS 13 or above.
**Requires Android 8 or above.
***The use of Apple account is only available on iOS devices.
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Table of ContentsSetting UpWi-Fi StreamingUsing KEF Connect AppFAQ and Troubleshooting
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 “LS50 Wireless 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. If the speakers are
connected to the network via a LAN cable. Select the speakers with this check mark.
4. Select your local Wi-Fi network.
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 3–5]
• The Wi-Fi icon on the top panel of the Primary Speaker is solid white 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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4.3.3 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 “LS50 Wireless 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 in your device.
[Step 3–5]
6. Tap “Set up LS50 Wireless II” at the top of the screen.
7. Tap “Add another home”.
8. Create a nickname for the home and then tap “Next”.
[Step 6–8]
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”.
10. Go back to the KEF Connect App to start using the speakers.
• The Wi-Fi icon on the top panel of the Primary Speaker is solid white 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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4.3.4 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 3–5]
6. Input the password of your local Wi-Fi network and then tap “Next”.
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. The connection process will be done automatically. Tap “Let’s start” when the
connection is established.
[Step 6–8]
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• The Wi-Fi icon on the top panel of the Primary Speaker is solid white 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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Table of ContentsSetting UpWi-Fi StreamingUsing KEF Connect AppFAQ and Troubleshooting
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. Try to keep the same
distance to the listener to form an equilateral triangle.
A
B C
A = B = C
• The two speakers are already paired and will be automatically connected with each
other wirelessly (resolution: 96 kHz/24 bit). If you prefer a higher resolution
(192 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 (6 m) is recommended.
Maximum Distance between the Two Speakers
Wireless Mode Up to 8 meters. Note that RF interference, including Wi-Fi
and Bluetooth, may reduce this distance.
Wired Mode Use the provided inter-speaker cable or connect with a
shielded Cat-6 Ethernet cable. The maximum cable length is
10 meters.
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Table of ContentsSetting UpWi-Fi StreamingUsing KEF Connect AppFAQ and Troubleshooting
5.2 Back Panel
Controls and connections are found on the back panel of each speaker, marked as shown.
VTV port Plays audio input from a source (e.g. television, game
console) through an HDMI cable.
OOptical input jack Plays audio input from a source (e.g. Blu-ray player,
cable box) through an optical cable.
CCoaxial input jack Plays audio input from a source (e.g. audio player)
through a coaxial cable.
XAuxiliary input jack Plays audio input from a source (e.g. phono stage)
through a 3.5 mm audio cable.
RFactory reset button 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.
PP/S pairing button Re-establishes the connection between the Primary
Speaker and the Secondary Speaker if the connection
is lost.
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BBluetooth pairing button Enables Bluetooth pairing. The speakers will be ready
to pair with a new device. Any Bluetooth connected
device will be disconnected.
TPrimay/Secondary
connection port
Connects the Primary Speaker and Secondary Speaker
with the inter-speaker cable.
SSubwoofer output jack Connects a subwoofer to the speakers through an
RCA cable.
EService port Connection port for service.
NNetwork port Connects the speakers to a router with a LAN cable.
AAC input connector Connects the speakers to the power source with the
power cables.
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5.3 Bottom Panel
• Rubber feet are found on the bottom panel of each speaker to prevent slipping on a
hard surface.
• Additionally, four threaded holes (M8 × 1.5) are also available for mounting on a stand
(remove the rubber feet first before mounting). For the best sound performance and
cable management, use the KEF S2 speaker stands.
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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