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KEF LSX II LT Powered speakers with HDMI, Apple AirPlay® 2, Chromecast built-in, Wi-Fi, and Bluetooth® (Sage Green)

Item # 991LSX2LTS

An elegant, compact stereo system with clear, open sound and wired and wireless options for playing music and TV audio.

An elegant, compact stereo system with clear, open sound and wired and wireless options for playing music and TV audio.

Item # 991LSX2LTS

Ships from distributor

On backorder
C$1,398.00 pair

Other options

About the KEF LSX II LT

Ned O.

Powered speakers with streaming, HDMI ARC, and more

The LSX II LT powered speakers from KEF are an ideal desktop or compact TV stereo system. They provide clear, open KEF sound with surprising bass heft from such small enclosures. And their elegant modern industrial design looks great almost anywhere.

Powered speakers with streaming, HDMI ARC, and more

KEF LSX II LT

Flexible powered hi-fi stereo sound with built-in streaming and pedigreed industrial design.

The LSX II LT powered speakers from KEF are an ideal desktop or compact TV stereo system. They provide clear, open KEF sound with surprising bass heft from such small enclosures. And their elegant modern industrial design looks great almost anywhere.

Wireless streaming features

You can play music wirelessly from your phone, tablet, or other device on the LSX II LT using Apple AirPlay 2, Chromecast built-in, or Bluetooth. That way you'll get the most out of supported streaming services like Amazon Music, Internet Radio, Qobuz, and more. It also lets you play music from network-attached storage (NAS) drives.

And TIDAL Connect and Spotify Connect let you stream to the LSX II LT right from within those apps for even more convenience.

Versatile connections

You'll connect the primary speaker to the secondary speaker with the included USB-C cable. Then add the system to your home network via Wi-Fi or Ethernet. The connection bank on the back of the left speaker lets you play music from a computer via USB-C or any digital source using its optical input.

You can get great TV sound via its HDMI ARC port. And you can even connect a powered subwoofer for extended bass.

DSP and EQ for sound tailored to your space

DSP-based room equalization lets you tune the speakers' sound to your listening space. Just answer a few simple questions in the free KEF Connect mobile app (for Apple® and Android™ devices).

KEF's concentric drivers, bi-amped for precise sound

KEF's Uni-Q driver design features a vented aluminum-dome tweeter mounted concentrically to the woofer. That helps deliver brilliantly detailed music with wide dispersion. And the primary speaker houses four separate amplifiers that supply 70 watts to each woofer and 30 watts to each tweeter, so the drivers get perfectly matched clean power for potent, articulate sound.

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Product highlights:

  • frequency response: 54-28,000 Hz (±3 dB)
  • bi-amped design with separate Class D woofer and tweeter amplifiers in the primary speaker for greater headroom and lower distortion
    • woofer amplifier power: 70 watts
    • tweeter amplifier power: 30 watts
  • collaboration with legendary industrial designer Michael Young
  • Uni-Q Driver Array technology makes your entire room sound like the "sweet spot"
  • 4-1/2" magnesium/aluminum alloy woofer
  • 3/4" vented aluminum dome tweeter
  • remote included
  • peak SPL: 102 dB
  • precise digital signal processing controls allow optimal room integration
  • free downloadable app lets you make pinpoint EQ adjustments with your Apple® or Android™ device
  • bass-reflex cabinet with rear port for accurate, musical bass
  • elegant curved front baffle
Wireless streaming features:
  • built-in dual-band Wi-Fi
  • Bluetooth® 4.2 with aptX® for high-quality audio streaming performance
  • Apple AirPlay 2 and Google Chromecast built-in
  • supports Spotify Connect and TIDAL Connect
  • plays music from DLNA devices on your network
Connections (located on back of primary speaker):
  • HDMI ARC input for connecting to a compatible TV
  • Toslink digital optical input (up to 24-bit/96kHz)
  • USB Type-C (up to 24-bit/96kHz)
  • 10/100 Mbps RJ-45 Ethernet input for network connection (up to 24-bit/384kHz)
  • USB-C port on each speaker for connecting the pair
  • mono RCA subwoofer output
  • detachable power cord
Dimensions and warranty:
  • 6-1/8"W x 9-1/2"H x 7-1/8"D
  • weight (total system): 15 lbs.
  • warranty: 1 year
  • MFR # LSXIILTSG

Customer reviews for KEF LSX II LT

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More details on the KEF LSX II LT

Stacey B.

Features & specs

Connections
Ethernet Port Yes
USB-A Port 0
USB-B Port 0
USB-C Port 1
3.5mm Aux Input No
RCA Input No
XLR Input 0
Phono Input No
1/4" Input 0
Digital Input Optical
HDMI Input ARC
Headphone Jack No
Subwoofer Output mono-RCA
Wireless Features
Bluetooth Built-in
Wi-Fi 802.11ac
Wi-Fi Bands 2.4, 5 GHz
Driver Details
Tweeter Size (Inches) 0.75
Tweeter Type Hard Dome
Tweeter Material Aluminum
Midrange Size (Inches) ---
Midrange Type ---
Woofer Size (Inches) 4.5
Woofer Type Magnesium/Aluminium alloy
Audio Specs
Watts RMS (Continuous) 200
Watts Maximum (Peak) Not given
Frequency Response 54-28k
Max. Digital Audio Bit Depth 24-bit
Max. Digital Audio Sample Rate 384 kHz
High-res Audio Playback
From Network Yes
From USB Thumb Drive (USB-A) No
From Computer (USB-B) No
From Computer (USB-C) Yes
Control
Handheld Remote Yes
Control by app Apple iOS, Android
Amazon Alexa No
Google Assistant Optional
Other Specs
Width (Inches) 6.125
Height (Inches) 9.4375
Depth (Inches) 9.25
Parts Warranty 1 Year
Labor Warranty 1 Year

Product Research

Audio Section
Network & Internet Integration
Bluetooth, Analog & Digital Inputs
Intuitive Control

Audio Section

24-Bit/384kHz DAC: The KEF LSX II LT utilizes a 24-bit/384kHz DAC (digital-to-analog converter) for audiophile quality playback. The LSX II LT supports 2ch stereo digital music files up to 24-bit/384kHz, as well as DSD256.

KEF's Music Integrity Engine (MIE): All aspects of the LSX II LT's performance is aided by KEF’s proprietary Music Integrity Engine (MIE). This collection of unique Digital Signal Processing algorithms is optimized for the Uni-Q driver configuration, enabling it to deliver a perfectly timed performance, for better imaging and a tighter sound.

Bi-Amplification: The KEF LSX II LT speaker system employs two Class-D amplifiers inside each speaker to power the tweeters and woofers. 30 watts is allocated for each tweeter, while 70 watts is delivered to each woofer provides a total system power of 200 watts. The result is high-fidelity sound at any volume level with no distortion.

  • The Primary speaker and the Secondary speaker connect to one another using the included 26.25' proprietary C-Link cable, allowing the Primary speaker to send an audio signal and and AC power to the Secondary speaker.
  • Only the Primary speaker of the LSX II LT will need to be plugged into an AC wall outlet using the included 6.5' detachable AC power cord. The Secondary speaker is powered from the Primary speaker using the included 26.25' proprietary C-Link cable.

Note: Only use the included 26.25" proprietary C-Clink cable to make connection between the Primary and Secondary speakers. Using other USB-C cables may not provide the same level of compatibility and could potentially impact the performance and safety of these speakers, as well as void the warranty.

Uni-Q Driver Array: The LSX II LT powered speaker utilizes KEF's patented 11th generation Uni-Q driver configuration, in which the tweeter is mounted at the acoustic center of the midrange cone. By placing the tweeter at the center of the midrange and bass cone, it radically improves stereo imaging. This not only makes music sound clear, detailed and lifelike, it does so across a wider listening area. With both acting as a single point source, the sound is dispersed widely and evenly throughout the listening area allowing you to experience superbly defined and perfectly balanced stereo imagery with a wide "sweet spot". The LSX II LT's Uni-Q driver array consists of a 0.75" aluminum dome tweeter and 4.5" magnesium/aluminum alloy cone.

Optimized Curved Cabinet w/ Bass Port: The LSX II LT speaker system's gently curved cabinet was designed with extensive use of Finite Element Analysis as well as featuring constrained layer damping as found in KEF's high-end audiophile products. Optimized using Finite Element Analysis, The LSX II LT speaker system's contoured baffle improves sound dispersion, ensuring that sound waves travel outwards and are not reflected around the cabinet surface. On the rear cabinet of each speaker is a flared port for smooth bass response without "chuffing". The result is a purer sound and accurate bass, with less cabinet coloration.

Note: The LSX II LT speaker system does not include grilles.

Subwoofer Output: The KEF LSX II LT speaker system features a rear-panel mono-RCA subwoofer output for connection of a powered subwoofer (sold separately).

Mounting & Placement Options: Compact, elegant and incredibly versatile, the LSX II LT speaker system looks great and fits comfortably into practically any decor. There is a 1/4"-20 threaded insert on the bottom of each speaker that allows you to secure the speakers to KEF's S1 floor-stands, KEF's P1 desktop stands or KEF's B1 wall-mount brackets (all sold separately). With no need for a cable to connect the two speakers, and no separate amps or other equipment to worry about connecting, you can position them almost anywhere.

  • For the best stereo experience, soundstage and stable connection, place the speakers within 26' apart from one another.
  • 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 of the speakers to the listener so it forms an equilateral triangle.
Network & Internet Integration

Wired or Wireless Network Connectivity: The KEF LSX II LT can be connected to your home network via a wired (Ethernet) or wireless (WiFi) connection. There is a RJ-45 Ethernet port (10/100Mbps) on the back of the speaker which allows for a hardwired connection. Built-in 2.4/5GHz dual-band WiFi (802.11 a/b/g/n/ac) allows the LSX II LT system to connect wirelessly to your home network. This network connection allows support for the KEF Connect App, Apple AirPlay 2, UPnP, and Chromecast Built-In. You can select between 3 audio streaming settings based on your home network.

  • 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.

Notes:

  • For better streaming stability, especially on hi-resolution music files, a 5GHz WiFi network with a router transmission speed of at least 1300 Mbps is recommended.
  • The KEF LSX II LT must always be first connected to your local network before you are able to use any of the speaker's wired or wireless source inputs.

Online Music Services & Internet Radio: The KEF LSX II LT provides access to Amazon, Deezer, Qobuz, and vTuner through the KEF Connect App (for Apple iOS and Android OS) on your compatible smartphone or tablet device.

  • Amazon Music: Amazon Music has a growing selection of over 2 million songs is always ad-free and on-demand, with curated playlists, personalized stations and unlimited skips. Upgrade to Prime Music Unlimited, and enjoy 10 million songs, weekly new releases, and many in HD.
  • Qobuz: Qobuz offers the biggest catalog of Hi-Fi and Hi-Res albums in the world, both for new releases and specialized genres. For hundreds of thousands of albums, Qobuz includes all the information you need to recreate the appeal of a real CD - the names of musicians, producers, lyrics (everything you need to know to appreciate your favorite albums). Qobuz offers MP3, CD, and Hi-Res quality subscriptions.
  • Deezer: With 43 million tracks, 100 million playlists, and a presence in 182 countries, Deezer literally covers the globe for its subscribers. Subscriptions start at $9.99/month, and include ad-free playback, premium audio quality, and more.
  • Internet Radio (vTuner): You have the ability to access thousands of internet radio stations through vTuner and save your favorite presets for easy access. Supported Internet Radio formatted content includes MP3, AAC, Ogg Vorbis and MMS.

Spotify & Tidal Connect: The KEF LSX II LT offers supports for Spotify Connect & Tidal Connect, allowing you to stream music directly from the Spotify or Tidal app on your Apple iOS or Android mobile device to the wireless speaker system.

  • Spotify Connect: If you subscribe to a free or paid Spotify subscription and have the Spotify App on your Apple iOS or Android smartphone, you can stream Spotify to the KEF speaker system using Spotify Connect. Spotify is a digital music service that gives you on-demand access to one of the largest music libraries in the world (over 15 million tracks and counting). Spotify makes it easier than ever to discover, manage, and share music with your friends. You can browse music by artist, album, track, or most popular; and create your own music library with customized playlists.
  • Tidal Connect: The integration of Tidal Connect will enable Tidal users to instantly select and wirelessly stream music to the McIntosh speaker system from within the Tidal app (for Apple iOS and Android OS). Tidal is a global streaming service that offers over 30 million songs in high-fidelity CD sound quality. Tidal has two pricing tiers; either $9.99 or $19.99 a month. Both pricing levels allow you to access Tidal's entire music library. The $19.99 tier has the added benefit of high-fidelity sound at CD-level quality.

Chromecast built-in: Use the Google Home App (for Apple iOS and Android OS) to enable Chromecast built-in. Chromecast built-in gives you access to hundreds of online music streaming services, internet radio, and podcasts. Chromecast built-in streams audio directly from the cloud, so you get the 24-bit/96kHz sound quality and the ability to enjoy crystal clear sound exactly the way the artist intended. Simply tap the Cast button from a Chromecast built-in compatible music app on your Apple iOS or Android OS device to start streaming to the KEF LSX II LT speaker system. You can search, browse, play, skip, and turn up the volume directly from the music apps you know and love on your compatible smartphone or tablet. Chromecast built-in supports FLAC, WAV, AAC, and MP3 music files. While you cast your music, you can still use your smartphone to answer a call, play a game, send a text, and even leave the room - all without interrupting what's playing on the KEF speaker system.

  • Music, Radio, & Podcasts: Chromecast built-in lets you play music from popular music services and search by artist, song, genre, album playlist, mood, or activity. You can also listen to your favorite internet radio stations and podcasts. Compatible music and internet radio apps include Tidal, Qobuz, Spotify, Pandora, TuneIn, iHeart Radio, YouTube Music, and more (subscriptions and fees will apply). You'll also be able to stream your favorite music, playlists, podcasts, and more that are stored on your Android (OS 4.4.2+) device to the LSX II LT speaker. You cannot stream stored content on an Apple iOS device using Chromecast built-in. If you're on your laptop or computer, you can also cast any music streaming website through the Chrome web browser to the speaker.
  • Multiroom Audio: Add more Chromecast built-in speakers throughout your home (sold separately - see Accessories Tab) to create a whole house audio experience. You can play the same Chromecast built-in compatible music app (like Tidal, Spotify, or Pandora) on all speakers or groups of speakers in different rooms of your home. You'll be able control the multiroom audio system from the Google Home app on your Apple iOS or Android device, or using the Google Assistant and your voice on a compatible Google Home device.
  • Voice Control (Optional): Purchase a Google Home wireless speaker (sold separately - see Accessories Tab) and gain voice control of compatible Chromecast Built-in music apps. You'll be able to access a specific music app and then select a specific station or song using only your voice. You'll also have voice control over Play, Pause, Skip, & Volume. The LSX II LT and your Google Home speaker must be connected to the same wireless (WiFi) network.

Note: Chromecast built-in currently supports a single account per user (up to 6) and streaming service. Click here for a complete list of Chromecast built-in compatible apps.

AirPlay 2: AirPlay 2 is an advanced and easy-to-use wireless multiroom audio platform for iTunes, Apple Music, and other compatible Apple iOS apps. With AirPlay 2 you can play any sound from your Apple iOS device (running iOS 11.4 or later) or Mac computer (running OS X 10.13.2) through the KEF LSX II LT speaker system and other compatible AirPlay 2 speakers throughout your home. You can choose to play audio in one room, play the same audio in grouped rooms, or play the same audio in every room. If you are an Apple Music subscriber, you can even play different music in different rooms (you can control and group directly from Apple's Music App and Home app on your Apple iOS device). You can even ask Siri-enabled devices (like your Apple iPhone, iPad, or Watch) to control playback of your Apple Music on the KEF LSX II LT. In addition, you can watch videos and movies from YouTube and Netflix on your compatible Apple iOS device or Mac computer with perfectly synced audio on the LSX II LT speaker system.

UPnP (Universal Plug-n-Play): The KEF LSX II LT is UPnP compatible, which enables you to play your digital music library stored on UPnP servers (such as a network server with integrated UPnP software,Windows PC, or Mac OS X computer) through the LSX II LT speaker system. You can stream a variety of compressed, lossless, and high-res music files. UPnP file browsing can be carried out using the KEF Connect App (for Apple iOS and Android). The LSX II LT supports streaming of 2ch stereo digital music files up to 24-bit/384kHz, as well as DSD256. Supported music file formats include - MP3, AAC, FLAC, WAV, AIFF, ALAC, WMA, DSD, LPCM and Ogg Vorbis.

Note: Windows Media Player version 11 or above incorporates built in UPnP support. A variety of third party UPnP applications are available that are compatible with both Windows and OS X operating systems.
Bluetooth, Analog & Digital Connectivity

Bluetooth 5.0: With built-in Bluetooth 5.0 and support for wireless audio streaming (A2DP), you are able to wirelessly stream stored music, music apps, and other audio content from your Bluetooth enabled smartphone, tablet, laptop, or computer to the KEF LSX II LT speaker system. With SSP (Simple Secure Pairing), Bluetooth source devices can be paired with a single press of a button and without entering a PIN code. Multiple devices can be paired with the LSX II LT speaker system, but only one device can be connected and playing at a time. You'll still need to control music playback and view song/artist/album info from your Bluetooth source device.

  • The KEF LSX II LT speaker does not support Bluetooth audio transmission to a set of Bluetooth-enabled headphones.
  • The KEF LSX II LT speaker system does not support Bluetooth hands-free communication for making and answering phone calls.
  • The LSX II LT must be first connected to your local network before it can be used as a Bluetooth speaker.

HDMI ARC (Audio Return Channel): The KEF LSX II LT is outfitted with a HDMI ARC jack for connection to your TV's HDMI ARC input, so you can playback your TV's audio signal through the LSX II LT speaker system. The HDMI ARC jack supports 2ch PCM audio up to 16-bit/48kHz.

  • The LSX II LT's HDMI ARC jack must be connected to a TV's HDMI ARC or eARC input; it will not work with a standard HDMI input.
  • The HDMI ARC jack does not support Dolby Digital, DTS, or other multi-channel formats.
  • The HDMI ARC jack does not support video.
  • The LSX II LT must always be first connected to your local network before using the HDMI connection.

Optical Digital Input: The KEF LSX II LT is equipped with one optical (toslink) digital input. The optical digital input supports 2ch PCM audio up to 24-bit/96kHz.

  • The optical and coaxial digital inputs do not support Dolby Digital, DTS, or other multi-channel formats.
  • The LSX II LT must always be first connected to your local network before using the optical or coaxial digital inputs.

USB-C Input: Using the LSX II LT's USB-C input, you can connect your desktop or laptop computer to the speaker system via a USB-C cable (sold separately). The LSX II LT supports Windows 10 and Mac OS X (neither requires a special USB driver). It is able to playback 2ch stereo PCM audio files up to 24-bit/192kHz from your compatible desktop computer or laptop.

Note: The speaker system must always be first connected to your local network before USB-C connection.

Intuitive Control

KEF Connect App: The KEF Connect app (for Apple iOS and Android OS) provides setup and control of the LSX II LT system from your compatible smartphone or tablet device. The KEF Connect app also gives you access to a variety of online music service and internet radio stations.

  • Wireless Setup: The KEF Connect app allows simple and quick connection of the LSX II LT to your home's wireless network router.
  • Online Music Services: The KEF Connect app provides access to Amazon HD, Deezer, Qobuz, and vTuner.
  • Playback Control: From the app, you can control playback volume, and input source selection.
  • Audio Optimization: The app lets you optimize your listening experience through its EQ settings; allowing you to adjust the output of the speaker to better suit the room and your personal taste.
  • Timers & Alarms: The app also lets you customize settings such as sleep timer, auto-wake up source, and child lock

Note: The KEF LSX II LT does not work with older KEF apps - such as the KEF Control and KEF Stream apps.

IR Remote: The included IR remote provides basic wireless operation of the KEF LSX II LT speaker system. The IR remote provides the following control functions - Power On/Off, Source Selection, Volume Up/Down, Mute, Play/Pause, and Previous/Next Track.

EQ Settings: For the best audio performance, apply sound settings from the KEF Connect app according to your listening area. EQ settings include - Desk Mode (-10 to 0 dB), Wall Mode (-10 to 0 dB), Wall Distance (3.9375"-19.6875"), Room Setting (Damped/Moderate/Lively), Treble Trim (-4 to 4 dB), Phase Correction (On or Off), Bass Extension (L/M/H), High Pass Frequency(50 to 120Hz), Sub Out Low Pass Frequency (40 to 240Hz), Sub Gain (-10 to 10 dB), and Sub Polarity (On or Off).

Auto Standby: The KEF LSX II LT speaker system will automatically go into Standby mode when there is no audio signal and no operation for 20, 30, or 60 minutes (user defined).

Auto Firmware Updates: Automatic firmware updates are done over your home's local network using the KEF Connect app (for Apple iOS and Android OS).

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Customer Q&A

1 question already asked

Q
Does the 2nd speaker get it's signal and power via USB-C? I'm surprised that's enough power for it.
daniel  Feb 16, 2024
1 answer
A
Greetings Dan. Preliminary information on these as we just got them. For sure the power to the secondary speaker is via USB-C.
hogan  Feb 17, 2024 (Staff)

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KEF LSX II

KEF LSX II

Powered speakers with HDMI, Apple® AirPlay® 2, Chromecast built-in, Wi-Fi®, and Bluetooth®
Lava Red, High Gloss
C$1,798.00 pair
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More connection flexibility and broader streaming support

The KEF LSX II offers these features:
  • primary and secondary speaker connect wirelessly or via RJ-45 cable
  • separate bi-amplification in each enclosure
  • 3.5mm analog aux input
  • support for MQA and Roon
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