Kef SP4025HC LS50 Wireless II Titanium Grey Bookshelf User Manual

Table of ContentsSetting UpWi-Fi StreamingUsing KEF Connect AppFAQ and Troubleshooting

User Manual

LS50 Wireless II

Table of Contents

1. Introduction ...............................................................................................................................5

2. General Information .................................................................................................................6

2.1 Reading and Storing the User Manual .............................................................................................................6

2.2 SignalSymbol/WordDenitions ........................................................................................................................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 (coming soon) ...................................................................................................................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 Podcast ......................................................................................................................................................... 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

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 eARC 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 Coaxial Input .................................................................................................43

12.1 Coaxial Cable Connection .................................................................................................................................. 43

12.2 Selecting Coaxial 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 (coming soon)...........................................................................................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 ...........................................................................................................................................................53

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 Queue (coming soon) .........................................................................................................................57

14.3.2.5 Playlists..........................................................................................................................................................59

14.4 Equalisations ..................................................................................................................................................................61

14.4.1 Normal Mode (coming soon) ...................................................................................................................61

14.4.2 Expert Mode........................................................................................................................................................63

14.4.3 SelectingaSoundProle(comingsoon) ...........................................................................................66

14.4.4 RenamingaSoundProle ...........................................................................................................................66

14.4.5 DeletingaSoundProle ..............................................................................................................................67

14.5 Prole ................................................................................................................................................................................ 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 – Start Up Tone (coming soon) ........................................................................ 71

14.7.4 Do Not Disturb – Top Panel Lock ........................................................................................................72

14.7.5 Speaker System Options – Cable Mode ...........................................................................................72

14.7.6 Speaker System Options – Inverse L/R Speakers ........................................................................ 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

14.8.5 Balance Control .................................................................................................................................................74

14.9 Firmware Upgrade ....................................................................................................................................................75

14.9.1 Automatic Firmware Update after Onboarding ........................................................................... 75

14.9.2 Automatic Firmware Check .......................................................................................................................75

14.9.3 Manual Firmware Update ............................................................................................................................ 76

14.10 Application .....................................................................................................................................................................77

14.10.1 Streaming Settings – Audio Quality ......................................................................................................77

14.10.2 Theme Settings – Dark Theme ...............................................................................................................77

14.10.3 Theme Settings – Reset Home Screen ..............................................................................................77

14.10.4 Analytics – Improve App/Speaker .........................................................................................................78

14.11 Support ............................................................................................................................................................................79

15. Cleaning and Maintenance ................................................................................................... 80

16. Disposal .................................................................................................................................... 81

16.1 Disposing of the Packaging .................................................................................................................................. 81

16.2 Disposing of the Speakers....................................................................................................................................81

16.3 Disposing of the Battery .......................................................................................................................................81

17. FAQ and Troubleshooting ................................................................................................... 82

17.1 Set-up ..............................................................................................................................................................................82

17.2 Playback and Streaming .........................................................................................................................................84

17.3 Troubleshooting .........................................................................................................................................................86

17.4 LED Indicators .............................................................................................................................................................89

18. Appendix .................................................................................................................................. 92

18.1 Specications ................................................................................................................................................................92

18.2 Explanation of symbols ..........................................................................................................................................95

18.2.1 Warning Symbols ..............................................................................................................................................95

18.2.2 Regional Symbols ..............................................................................................................................................95

18.3 IR Command Codes ................................................................................................................................................ 97

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. Completely re-engineered and capable of playing any source seamlessly,

LS50 Wireless II 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.

Table of ContentsSetting UpWi-Fi StreamingUsing KEF Connect AppFAQ and Troubleshooting

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.

Table of ContentsSetting UpWi-Fi StreamingUsing KEF Connect AppFAQ and Troubleshooting

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).

×1 set

×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 and contact your retailer.

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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: 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.

Table of ContentsSetting UpWi-Fi StreamingUsing KEF Connect AppFAQ and Troubleshooting

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 be “onboarded”

to your personal Wi-Fi network through the KEF Connect App (see chapter

“Onboarding”).

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 log

in 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 an Apple account is only available on iOS devices.

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. 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 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.

Table of ContentsSetting UpWi-Fi StreamingUsing KEF Connect AppFAQ and Troubleshooting

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 on 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.

Table of ContentsSetting UpWi-Fi StreamingUsing KEF Connect AppFAQ and Troubleshooting

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”. 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 6–8]

Table of ContentsSetting UpWi-Fi StreamingUsing KEF Connect AppFAQ and Troubleshooting

•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.

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, or vice versa. Try to

keep the same distance to the listener to form an equilateral triangle.

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.

Table of ContentsSetting UpWi-Fi StreamingUsing KEF Connect AppFAQ and Troubleshooting

5. Connection and Control Interface

5.1 Front Panel

Primary SpeakerSecondary Speaker

IR receiver

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5.2 Back Panel

Controls and connections are found on the back panel of each speaker, marked as shown.

V TV port Plays audio input from a source (e.g. ARC/eARC port

of television) through an HDMI cable.

O Optical input jack Plays audio input from a source (e.g. Blu-ray player,

cable box) through an optical cable.

C Coaxial input jack Plays audio input from a source (e.g. audio player)

through a coaxial cable.

X Auxiliary input jack Plays audio input from a source (e.g. turntable with

phono stage) through a 3.5 mm audio cable.

R Factory 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.

P P/S pairing button Re-establishes the connection between the Primary

Speaker and the Secondary Speaker if the connection

is lost.

Table of ContentsSetting UpWi-Fi StreamingUsing KEF Connect AppFAQ and Troubleshooting

B Bluetooth pairing button Enables Bluetooth pairing. The speakers will be ready

to pair with a new device. Any Bluetooth connected

device will be disconnected.

T Primary/Secondary

connection port

Connects the Primary Speaker and Secondary

Speaker with the inter-speaker cable.

S Subwoofer output jack Connects a subwoofer to the speakers through an

RCA cable.

E Service port Connection port for service.

N Network port Connects the speakers to a router with a LAN cable.

A AC input connector Connects the speakers to the power source with the

power cables.

Table of ContentsSetting UpWi-Fi StreamingUsing KEF Connect AppFAQ and Troubleshooting

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.

Table of ContentsSetting UpWi-Fi StreamingUsing KEF Connect AppFAQ and Troubleshooting

5.4 Top Panel

Control buttons and mode indicators are found on the top panel of the Primary

Speaker.

Wi-Fi

Volume up

Bluetooth

Optical

Coaxial

Auxiliary

Mute

Volume downSource

On/off

Mode indicator

Control button

Table of ContentsSetting UpWi-Fi StreamingUsing KEF Connect AppFAQ and Troubleshooting

5.5 Remote Control

Mute button

Volume up button

Play/pause button

Next source button

On/off button

Volume down button

Previous button

Previous source 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.

Table of ContentsSetting UpWi-Fi StreamingUsing KEF Connect AppFAQ and Troubleshooting

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.

Turn on/off the speakers and switch sources

Shortcuts to music content (music streaming

services, Internet radio stations, podcasts and

Media servers*)

EQ settings

Speaker settings

Latest news and stories from KEF

Music content

Remote control

Home

*Coming soon

Table of ContentsSetting UpWi-Fi StreamingUsing KEF Connect AppFAQ and Troubleshooting

14.1.2 Editing the Home Screen (coming soon)

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 to show or hide a tile.

3. Tap the edit icon ( ) at the top right of a tile.

4. Tap the “+” or “–” symbols 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.

Table of ContentsSetting UpWi-Fi StreamingUsing KEF Connect AppFAQ and Troubleshooting

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.

Table of ContentsSetting UpWi-Fi StreamingUsing KEF Connect AppFAQ and Troubleshooting

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.

Table of ContentsSetting UpWi-Fi StreamingUsing KEF Connect AppFAQ and Troubleshooting

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.

Table of ContentsSetting UpWi-Fi StreamingUsing KEF Connect AppFAQ and Troubleshooting

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”.

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.

Table of ContentsSetting UpWi-Fi StreamingUsing KEF Connect AppFAQ and Troubleshooting

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.

Table of ContentsSetting UpWi-Fi StreamingUsing KEF Connect AppFAQ and Troubleshooting

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

Previous/next

Play/pause

Track scroll

Options

Repeat

Hide playback screen

Shuffle

Volume control

Favourites

Track metadata

Queue

MQA authentication type

14.3.2.2 Search

Tap the search icon (

) to look for artists, albums or songs in the current music

source.

Table of ContentsSetting UpWi-Fi StreamingUsing KEF Connect AppFAQ and Troubleshooting

14.3.2.3 Favourites

•Selecting or Deselecting Favourites

In the playback screen, tap the favourite icon (

) to select or deselect an item

(music, podcast, radio station) as favourites.

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 Favorites” or “Remove from

Favourites”.

•Accessing your favourites

To show the favourites in your current music source, tap “Favourites” in the main

menu.

Table of ContentsSetting UpWi-Fi StreamingUsing KEF Connect AppFAQ and Troubleshooting

14.3.2.4 Play 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”.

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.

Table of ContentsSetting UpWi-Fi StreamingUsing KEF Connect AppFAQ and Troubleshooting

•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.

Table of ContentsSetting UpWi-Fi StreamingUsing KEF Connect AppFAQ and Troubleshooting

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 (

) at the bottom of the Home

screen.

2. Tap“Addnewprole”

3. Select “Normal mode”.

4. Createanameforyournewproleandthentap“Save”.

5. Congure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 m

/ 20–40 m2 / > 40 m

)

•Subwoofer is plugged in (On/Off).

If a subwoofer is plugged in, set up the subwoofer volume and speaker/subwoofer

balance.

6. Tap “Save” when the settings are done.

14.4.2 Expert Mode

1. In the KEF Connect App, tap the EQ settings icon (

) at the bottom of the Home

screen.

2. Tap“Addnewprole”.

3. Select “Expert mode”.

4. Createanameforyournewprole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)

•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)

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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.

Understanding the Subwoofer Settings

Subwoofer/Speaker Balance (Normal 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.

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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prole,taptheoptionicon( ) at the top right.

2. Tap“Renameprole”.

3. Createanewnameforyourproleandthentap“Save”.

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14.4.5 Deleting a Sound Profile

1. IntheselectedEQprole,taptheoptionicon(

) at the top right.

2. Tap“Deleteprole”.

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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 (

) at the bottom of the Home

screen.

2. Tap“Viewprole”.

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.

Not set up yet with KEF Connect App

Already set up with KEF Connect

App on another mobile device

Current speakers

Speakers on the same network but turned off

Speakers on the same network and ready for switching

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rmware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 – Start Up Tone (coming soon)

This setting enables the start up tone to be muted when the speakers are turned on.

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14.7.4 Do Not Disturb – Top Panel Lock

This setting enables the buttons on the top panel of the Primary Speaker to be

disabled (child lock). The LED indicators will still be on. The control of the speakers can

still be performed in the KEF Connect App and on the remote control.

14.7. 5 Speaker System Options – Cable Mode

You can connect the Primary Speaker and Secondary Speaker with the provided

inter-speaker cable through the “To L/R” 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 192 kHz/24 bit (wireless: 96 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.

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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.

14.8.5 Balance Control

This setting allows you to adjust the volume balance between the left and right

channels.

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14.9 Firmware Upgrade

14.9.1 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.

14.9.2 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 2–3 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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14.9.3 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rmwareupdate.

Table of ContentsSetting UpWi-Fi StreamingUsing KEF Connect AppFAQ and Troubleshooting

14.10 Application

This menu allows you to customise the streaming audio quality, theme 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”.

14.10.1 Streaming Settings – Audio Quality

This setting allows you to select the audio quality for music streaming.

•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.

14.10.2 Theme Settings – Dark Theme (coming soon)

This setting allows you to change the app to a dark background. This improves text

readability in a low light environment and saves battery life.

14.10.3 Theme Settings – Reset Home Screen (coming soon)

This setting allows you to reset the Home screen of the app to default settings.

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14.10.4 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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14.11 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!

LS50 Wireless 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 LS50 Wireless II?

•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 specications does LS50 Wireless II 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

LS50 Wireless II. 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 LS50 Wireless II, 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 LS50 Wireless II cover?

•10–100 m

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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 (192 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 dierent apps?

•Recommendations for the best wireless streaming options with regard to music/

media apps on your mobile devices.

App

Wireless streaming protocol

AirPlay 2 Chromecast ROON

Ready

Music

streaming

app native

protocol

KEF

Connect

App

Bluetooth

Spotify

–

Spotify

Connect –

TIDAL

Connect

QQ Music –

QPlay

–

Apple Music – – –

Amazon Music – –

Deezer – –

Qobuz –

Internet radio – –

Audio podcast – –

Youtube

(audio)

– – –

= Supported

= Supported and recommended for the best audio quality and streaming stability.

2. Can I stream audio output from Youtube, Netix and other media contents to

LS50 Wireless II?

•Depending on the service, you can stream through AirPlay, Chromecast or Bluetooth.

3. Is the subwoofer output mono or stereo?

•The output is mono.

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4. How should I set the speakers if I prefer to adjust the volume on an external

equipment (preamplier, 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”.

Table of ContentsSetting UpWi-Fi StreamingUsing KEF Connect AppFAQ and Troubleshooting

17.3 Troubleshooting

1. What should I do to set up LS50 Wireless II 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 nd my LS50 Wireless II in the network during set-up?

•Wait for about 30–40 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.

•Check if there is a network problem or you need to set up the speakers to a less

crowded router channel.

•Change the audio streaming quality in the KEF Connect App.

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 (Source and Volume Down

buttons on the top panel of the Primary Speaker are blinking).

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.

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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.

8. The audio is out of sync with the picture when using LS50 Wireless II with a TV.

•If available, try the video delay/lip sync function of your TV.

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.

•Check the TV icon on the top panel of the Primary Speaker.

If the TV icon is blinking, the HDMI connection is not found. In this case, make sure

that the HDMI cable is connected to the eARC or ARC port of the TV.

If the TV icon is pulsing (fade in/fade out), 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 TV icon on the top panel

should turn solid (both CEC and ARC connections are now established).

•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.

•For HDMI eARC input, make sure the connecting HDMI cable is of high speed with

Ethernet to provide sufficient bandwidth and speed.

•Change the HDMI cable (our internal tests found that HDMI cables of lower quality

may not be able to establish the connection).

•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).

Table of ContentsSetting UpWi-Fi StreamingUsing KEF Connect AppFAQ and Troubleshooting

11. I cannot nd 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.

Table of ContentsSetting UpWi-Fi StreamingUsing KEF Connect AppFAQ and Troubleshooting

17.4 LED Indicators

The connection and operation status can be checked through the colours and patterns

of the LED indicators on the top panel of the Primary Speaker.

LED indicator Status

The speakers are trying to connect to a

Wi-Fi network.

Wi-Fi icon is blinking white and amber.

The speakers are connected to a Wi-Fi

network.

Wi-Fi icon is solid white.

The speakers are unable to connect to a

Wi-Fi network.

Wi-Fi icon is blinking amber slowly.

Bluetooth discovery mode – The speakers

are ready to pair with a Bluetooth device.

Bluetooth icon is pulsing.

The speakers are muted.

Mute button is blinking.

TV mode is selected but HDMI cable is

not connected.

TV icon is blinking.

Table of ContentsSetting UpWi-Fi StreamingUsing KEF Connect AppFAQ and Troubleshooting

LED indicator Status

The Primary Speaker cannot find the

Secondary Speaker wirelessly. Short

press the P/S pairing button (P) on the

back panel of the Primary Speaker to re-

establish connection.

Source button and

Volume Down button are blinking.

Cable Mode is enabled but the connection

between the speakers is not established.

Connect the inter-speaker cable to the

Primary/Secondary connection ports (T)

on the speakers.

Source button, Mute button and

Volume Down button are blinking.

Firmware update is in progress. Do not

unplug the power cables until the firmware

update is completed.

Source button and Volume Down button

are blinking alternately.

Firmware update failed. Do not press the

Reset button (R) on the Primary Speaker.

1. Pull the power cables from both

speakers.

2. Wait approximately 60 seconds.

3. Plug the power cables back to both

speakers.

4. Performthermwareupdateagainon

the KEF Connect App.

If the problem persists, please contact your

KEF dealer.

Source button and Volume Down button

are blinking slowly.

Table of ContentsSetting UpWi-Fi StreamingUsing KEF Connect AppFAQ and Troubleshooting

LED indicator Status

There is a system error.

1. Pull the power cables from both

speakers.

2. Wait approximately 30 minutes.

3. Plug the power cables back to both

speakers to resume normal operation.

If the problem persists, please contact your

KEF dealer.

Note: System error may occur with

improper power connections. Do not

use a socket/outlet extender with the

speakers.

TV icon, OPT icon and Mute button

are blinking.

Table of ContentsSetting UpWi-Fi StreamingUsing KEF Connect AppFAQ and Troubleshooting

18. Appendix

18.1 Specifications

Model LS50 Wireless II

Drive units Uni-Q Driver Array:

LF: 130 mm (5.25 in.) aluminium cone

HF: 25 mm (1 in.) vented aluminium dome with

Metamaterial Absorption Technology

Frequency range (-6 dB)

measured at 85 dB/1 m

40 Hz – 47 kHz

(Depends on EQ settings)

Frequency response (±3 dB)

measured at 85 dB/1 m

45 Hz – 28 kHz

(Depends on EQ settings)

Amplifier output power

(per speaker)

LF: 280 W HF: 100 W

Amplifier class (per speaker) LF: Class D HF: Class AB

Max SPL measured at 1m 108 dB

Wireless streaming features AirPlay 2

Google Chromecast

ROON Ready

UPnP Compatible

Bluetooth 4.2

Streaming services Spotify via Spotify Connect

Tidal

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

Coaxial up to 192 kHz / 24 bit

HDMI up to 192 kHz / 24 bit

(Depends on source resolution)

Interspeaker connection Wireless: all sources resampled to 96 kHz / 24 bit PCM

Wired: all sources resampled to 192 kHz / 24 bit PCM

Table of ContentsSetting UpWi-Fi StreamingUsing KEF Connect AppFAQ and Troubleshooting

Supported format (all inputs) MP3, M4A, AAC, FLAC, WAV, AIFF, ALAC, WMA,

LPCM and Ogg Vorbis

Supported format (network) MQA

DSF: DSD64, DSD128, DSD256

DFF: DSD64

Dimensions

(H x W x D per speaker)

305 × 200 × 311 mm (12.0 × 7.9 × 12.2 in.)

Weight (per set) 20.1 kg (44.31 lbs)

Power input 100–240 VAC 50/60 Hz

Power consumption 200 W (operating power)

< 2.0 W (standby power)

Primary Speaker Secondary Speaker

Inputs HDMI eARC

TOSLINK Optical

Digital Coaxial

Analog 3.5 mm Auxiliary

USB Type A (service)

RJ45 Ethernet (network)

RJ45 Ethernet

(interspeaker)

USB Type A (service)

RJ45 Ethernet

(interspeaker)

Output RCA Subwoofer output RCA Subwoofer output

Wi-Fi network standard IEEE 802.11a/b/g/n/ac

IPv4, IPv6

–

Wi-Fi network frequency

band

Dual-band 2.4 GHz / 5

GHz

–

Metamaterial Absorption Technology is a joint development with Acoustic Metamaterials Group

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.

Table of ContentsSetting UpWi-Fi StreamingUsing KEF Connect AppFAQ and Troubleshooting

Apple and AirPlay are registered trademarks of Apple Inc., registered in the U.S. and

other countries.

Deezer is a registered trademark of Access Industries.

Google Play store and Chromecast are registered trademarks of Google LLC.

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.

Table of ContentsSetting UpWi-Fi StreamingUsing KEF Connect AppFAQ and Troubleshooting

18.2 Explanation of symbols

18.2 .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.

18.2.2 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.

Products bearing the cTUVus Certification Mark reflect supplier

commitment and confidence and have been independently confirmed to

meet the minimum requirements of US and Canadian electrical safety

standards.

This FCC mark certifies that the electromagnetic interference from the

device is under the limits approved by the Federal Communications

Commission in the US.

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.

Table of ContentsSetting UpWi-Fi StreamingUsing KEF Connect AppFAQ and Troubleshooting

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.

Products bearing this mark is a proof that the product has been

approved by the United Arab Emirates (UAE) Federal Government

through Emirates Authority for Standardization and Metrology (ESMA).

Table of ContentsSetting UpWi-Fi StreamingUsing KEF Connect AppFAQ and Troubleshooting

18.3 IR Command Codes

LS50 Wireless 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: NEC

Factory Code: 0x01

Functions Function codes

1 Power on/off toggle 0x40

2 Mute/un-mute toggle 0x20

3 Play/Pause 0x18

4 Forward 0x52

5 Next source 0x58

6 Volume up 0x60

7 Volume down 0xA0

8 Backward 0xD2

9 Power ON 0x38

10 Power OFF 0x3A

11 Mute 0x48

12 Un-mute 0x4A

13 Source: Wi-Fi 0x30

14 Source: Bluetooth 0x2A

15 Bluetooth pairing 0x98

16 Source: AUX 0x02

17 Source: Optical 0x0A

18 Preset volume (30 %) 0x78

19 Source: HDMI 0x88 / 0x8A

20 Source: Coaxial 0xE0

21 Previous source 0xD0

For more support, please visit kef.com

Kef SP4025HC LS50 Wireless II Titanium Grey Bookshelf Speakers (Pair) LS50WIIT

Product's Documents

User Manual

Specifications

Kef SP4025HC Questions and Answers