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KEF LSX II LT Review
KEF LSX II LT

Main Features

  • 11th Generation Uni-Q Driver
  • 0.75" Hard-Dome Tweeter
  • 4.5" Magnesium/Aluminium alloy Woofer
  • 54-28k Hz Frequency Response
  • 200-watt RMS Integrated Amplifier
  • 24-bit Max Depth / 384 kHz Max Sample Rate
  • Built-in 5.0 Bluetooth
  • HDMI Input (ARC)
  • Weight:7.80 lbs / 3.60 kg
  • Dimensions(HxWxD): 9.5"x6.1"x7.1" / 240 × 155 × 180 mm
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KEF LSX II LT Review
KEF LSX II LT KEF LSX II LT
See at AMAZON

KEF LSX II LT is a 2-way Powered Bass Reflex Bookshelf speaker by KEF. LSX II LT's built-in amplifier provides 200-watt RMS. The built-in power amplifier saves space & eliminates the need to connect KEF LSX II LT to a stereo receiver or external power amp. It features a 0.75" Hard-Dome Tweeter and 1 x 4.5" Magnesium/Aluminium alloy Woofer. The speaker has a frequency range of 54-28k Hz. KEF LSX II LT has an MSRP of 999$ per pair.

KEF LSX II LT Speaker Structure
KEF LSX II LT Speaker Structure

KEF replaced the older LSX with this model. Follow the link to read our detailed comparison of these models:
Compare KEF LSX II LT vs KEF LSX
KEF LSX II LT  Lifestyle
KEF LSX II LT Lifestyle

KEF's LS Series of Loudspeakers

LSX II LT is a member of KEF's LS series of Powered speakers. Below you can see the main specs of these speakers.

KEF LS Series Speakers
Model Frequency Watts RMSMax Depth / Sample Rate Woofer
KEF LSX II
Compare
54-28k Hz 200-watt24-bit/384 kHzΩ 1 x 4.5"
KEF LSX II LT
54-28k Hz 200-watt24-bit/384 kHzΩ 1 x 4.5"
KEF LS60 Wireless
Compare
31-24k Hz 1400-watt24-bit/384 kHzΩ 4 x 5.25"
KEF LS50 Wireless II
Compare
45-28k Hz 380-watt32-bit/384 kHzΩ 1 x 5.25"
KEF LSX
Compare
59-28k Hz 200-watt24-bit/96 kHzΩ 1 x 4.5"
KEF LS50 Wireless
Compare
79-28k Hz 230-watt24-bit/192 kHzΩ 1 x 5.25"


**This post contains affiliate links, and I will be compensated if you make a purchase after clicking through my links. As an Amazon Associate I earn from qualifying purchases.

Frequency Response of the KEF LSX II LT Speaker

KEF LSX II LT has a Frequency response range of 54-28k Hz at ±3dB. With a minimum frequency of 54 Hz, LSX II LT delivers moderate bass depth so depending on your use case, you might want to consider adding a subwoofer to your system.

To focus on the subwoofers that are in a similar price range with KEF LSX II LT, check out the Powered Subwoofers under $999. Alternatively, find the Full list of Powered Subwoofers regardless of the price.
Here we have a comparison of how LSX II LT's Low and High frequency values compare with the average, max and min Low and High frequency values in its class.
Low Frequency
Bookshelf Speakers
KEF LSX II LT
Min
Average
Max
High Frequency
Bookshelf Speakers
KEF LSX II LT
Min
Average
Max
KEF LSX II LT Woofer
KEF LSX II LT's Magnesium/Aluminium alloy Woofer


KEF LSX II LT Back View
KEF LSX II LT Back View

Handheld Remote

KEF LSX II LT comes with a handheld remote which is obviously very useful to control your powered speakers from a distance.
KEF LSX II LT Remote
KEF LSX II LT Handheld Remote

Bluetooth Connectivity

KEF LSX II LT employs Built-in 5.0 Bluetooth for wireless music streaming from your Bluetooth-enabled devices such as Apple iPod/iPhone/iPad, Android smartphone/tablet, Windows PC, Mac computers/laptops. LSX II LT can playback up to 24-bit / 384 kHz with compatible devices.

KEF LSX II LT supports the following Bluetooth Codecs when used with supported devices:

  • aptX
  • AAC
  • SBC

Supported Streaming Services

KEF LSX II LT supports the following Streaming Services:

  • Spotify via Spotify Connect
  • Tidal
  • Amazon Music
  • Qobuz
  • Deezer
  • QQ Music via QPlay
  • Internet Radio
  • Podcast

Supported Wireless Streaming System

KEF LSX II LT supports the following wireless streaming methods:

  • AirPlay 2
  • Google Chromecast
  • UPnP Compatible
  • Bluetooth 4.2

App-Based Control

KEF LSX II LT can be controlled wirelessly via KEF Connect application available on Apple iOS and Android.

Inputs and Outputs

  • USB Port: USB-C (connects to your computer)
  • Wired Subwoofer Output
  • Digital Input: Optical
  • HDMI Input: ARC
  • Ethernet Port

KEF LSX II LT Connections
KEF LSX II LT Connections

KEF LSX II LT External Dimensions and Weight

KEF LSX II LT has external dimensions of (Height x Width x Depth) 9.5 × 6.1 × 7.1 inch (240 × 155 × 180 mm ).

Base Surface Area
Base surface area of a loudspeaker may become a determining factor when the space in your room or desk is limited. The base area of KEF LSX II LT is approximately 279.0cm2 / 43.2inch2.

To get a better perspective on the real life size of KEF LSX II LT, let's compare it with a standard size Compact Disc which has a diameter of 4.7inch (120mm).

KEF LSX II LT Real Life Body Size Comparison
KEF LSX II LT Speaker Size Compared to a Compact Disc

Here we place the KEF LSX II LT virtually next to a standard width amplifier and turntable on a BDI Octave Media Cabinet to get a better idea about the size.

KEF LSX II LT placed next to an amplifier and turntable
KEF LSX II LT Speaker next to an amplifier and turntable

Weight

The KEF LSX II LT weighs 3.60kg / 7.9lbs per piece. Here is a comparison of how LSX II LT's weight compares with the average, max and min weights in its class.

Weight
All Bookshelf Speakers
KEF LSX II LT
Min
Average
Max
Weight
Bookshelf Speakers under $999
KEF LSX II LT
Min
Average
Max
KEF LSX II LT  on a Stand
KEF LSX II LT on a Stand

How does the KEF LSX II LT compare to the KEF LS50 Wireless II?

One of the natural alternative to the KEF LSX II LT is the LS50 Wireless II which is located one step higher in KEF's Powered Bookshelf selection.

Here is a scaled size comparison of these two speakers to give you an idea how their external dimensions compare:

KEF LSX II LT vs KEF LS50 Wireless II Size Comparison - Front View
Comparison image of KEF LSX II LT and KEF LS50 Wireless II Size and External Dimensions

Check the Detailed Comparison of KEF LSX II LT vs LS50 Wireless II for more details.

Cabinet type and Materials

KEF LSX II LT has a Bass Reflex type cabinet. Bass Reflex type loudspeakers (aka Ported, Vented or Reflex Port) have enclosures that uses a port, hole or vent cut into the cabinet. Ported designs are generally more efficient than the Sealed designs.

Speaker Feet

KEF LSX II LT comes with Optional floor spikes which you can use to secure your loudspeaker on the surface that you are putting on.

It is always recommended to use some kind of feet under all types of speakers. Besides limiting the movement of the speakers, it also compensates for non-flat surfaces and limits the contact surface area of the speaker. Rubber based feet also help isolating the vibrations within certain frequency ranges.

Port Position

KEF LSX II LT is a rear-firing port speaker so you have to make sure you leave enough space between the back of the speaker and wall or bookshelf so that it has room to breathe.

Available colors

KEF LSX II LT is available in Sage Green, Graphite Grey and Stone White.

KEF LSX II LT  Colors
KEF LSX II LT Colors

Wall Mounting

LSX II LT doesn't sport any built-in mounting bracket, so you need an external structure to mount it on walls.

Speaker Stands

KEF sells a dedicated speaker stand for the LSX II LT with a model name KEF S1. You can check the latest price and availability of these stands at B&H PHOTO and Amazon.

KEF S1 for KEF LSX II LT
KEF S1 Speaker Stands for KEF LSX II LT

What's in the Box of KEF LSX II LT?

Here are the items that are included inside the box of LSX II LT:
  • 2 Wireless powered speakers
  • 6.5-feet AC power cords
  • 3m - 10ft Interspeaker cable
  • Remote control
  • 2 AAA batteries
  • Quick Start Guide
  • Important Safety Information
  • Warranty Information
  • Maintenance Guide
  • Recommended Accessories

    Here is a list of accessories that we think you may need for the KEF LSX II LT.

    • Vibration Isolators: IsoAcoustics isolators more affordable options too.
    • Acoustic Panels and Treatments: Your room is as important as your stereo equipment so acoustic treatments goes a long way in improving the overall performance.
    • Speaker Stands: Stands bring your bookshelf speakers to ideal height (rule of thumb is to have the tweeter level with your ear in your listening position), helps stability and acoustical isolation.

    User's Manual

    For more information about how to setup, use and maintain the KEF LSX II LT, use the direct link below to download the official manual document:
    Download User Manual for KEF LSX II LT

    Official Brochure

    Here is a link to download the official brochure for the KEF LSX II LT speaker:
    Official Brochure for KEF LSX II LT

    Official Product Page

    Official manufacturer's product page for the KEF LSX II LT speaker can be found below:
    Official Product Page for KEF LSX II LT

    Warranty

    1 Year of parts warranty and 1 Year of labor warranty is generally provided by the manufacturer.

    KEF LSX II LT Alternatives in Powered Bookshelf Speakers
    Model Type Watts RMS Bluetooth Frequency
    KEF LSX II
    Compare
    2-way 200w Built-in 4.2 54-28k Hz
    KEF LSX
    Compare
    2-way 200w Built-in 4.2 59-28k Hz
    KEF LS50 Wireless II
    Compare
    2-way 380w Built-in 4.2 45-28k Hz
    KEF LS50 Meta
    Compare
    2-way 85 dB 8 ohms 79-28k Hz
    ELAC Debut DCB41
    Compare
    2-way 100w Built-in 66-25k Hz
    KEF LS50 Wireless
    Compare
    2-way 230w Built-in 4.0 79-28k Hz
    Klipsch The Sevens
    Compare
    2-way 200w Built-in 5.0 39-25k Hz
    Q Acoustics M20 HD
    Compare
    2-way 128w Built-in 5.0 55-22k Hz
    Frequently Asked Questions about KEF LSX II LT
    What is the External Dimensions of KEF LSX II LT

    KEF LSX II LT Detailed Specifications

    General
    BrandKEF
    Full Model NameKEF LSX II LT
    Speaker Type2-way Bookshelf
    Max SPL102 dB
    Frequency Response54-28k Hz
    Amplifier Specs
    Watts RMS200 watts
    TypeClass D
    Watts by DriverLF: 70W HF: 30W per speaker
    DAC Specs
    Max Digital Audio Bit Depth24-bit
    Max Digital Audio Sample Rate384 kHz
    DRIVERS
    Woofer Size4.5-inch
    Woofer CompositionMagnesium/Aluminium alloy
    Woofer SurroundRubber
    Tweeter Size0.75-inch
    Tweeter TypeHard-Dome
    Port Positionrear
    DIGITAL ECOSYSTEM
    Control by AppApple iOS, Android
    App NameKEF Connect
    Amazon AlexaNo
    Google AssistantNo
    Streaming ServicesSpotify via Spotify Connect
    Tidal
    Amazon Music
    Qobuz
    Deezer
    QQ Music via QPlay
    Internet Radio
    Podcast
    Wireless StreamAirPlay 2
    Google Chromecast
    UPnP Compatible
    Bluetooth 4.2
    Multi-room StreamingYes
    Built-in DSPYes
    Subwoofer OutputWired

    CONNECTIONS
    Ethernet PortYes
    USB PortUSB-C (connects to your computer)
    Phono InputNo
    Digital InputOptical
    HDMI InputARC
    Headphone JackNo
    BluetoothBuilt-in 5.0
    Bluetooth CodecaptX, AAC, SBC
    Wi-Fi802.11n
    Wi-Fi Bands802.11n
    Wi-Fi Bands2.4, 5 GHz
    Port Positionrear
    PHYSICAL SPECS
    Height240.0mm ( 9.5-inch)
    Width155.0mm ( 6.1-inch)
    Depth180.0mm ( 7.1-inch)
    Height240.0mm ( 9.5-inch)
    Weight3.60kg ( 7.80 lbs)
    EnclosureBass Reflex
    Available ColorsSage Green, Graphite Grey, Stone White
    Mounting BracketNo
    Moisture ResistanceNo
    OTHER
    Handheld RemoteYes
    Parts Warranty1 Year
    Labor Warranty1 Year
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