KEF LSX II Wireless HiFi Speakers


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KEF LSX II Wireless Speaker System

The KEF LSX II is an award winning wireless speaker system that offers an incredibly versatile array of connections including Bluetooth, AirPlay 2, Chromecast, Toslink digital optical, HDMI ARC, USB-C and a 3.5mm aux input, with such a range of connectivity the set-up possibilities are almost endless. With equally impressive design, superb build quality and a choice of six stylish colours the KEF LSX II look as good as they sound.     

Versatile Connectivity

You can stream music wirelessly from a variety of sources via Wi-Fi using the popular Apple AirPlay 2 and Chromecast platforms. Or you can stream directly from phones, tablets, and PCs using Bluetooth. The right-hand speaker features a wealth of analogue and digital connections for hooking up a range of additional components, including: 

  • HDMI ARC input for connecting to a compatible TV
  • Toslink digital optical input for TV, CD player, etc.
  • USB Type-C for a compatible computer
  • 3.5mm analogue aux input for a portable music player
  • RJ-45 Ethernet input for network connection
  • RCA Sub output lets you add a powered subwoofer for more bass

Audiophiles may appreciate the ability to make a wired connection between speakers via the included Ethernet cable for optimal sound, but the pair can also be linked wirelessly to allow for fewer cables and more flexible placement options.

Perfect power with Class D digital amplification

With traditional passive speakers you also need to find just the right amplifier to match, with LSX II KEF has eliminated the guesswork by putting two custom-designed Class D digital amplifiers in each speaker — 70 watts to each 4-1/2" woofer, and 30 watts to each 3/4" tweeter — so each driver gets exactly the power it needs to produce the best possible sound quality.

DSP and room EQ for accurate sound

Customised digital signal processing (DSP) ensures true Hi-Fi performance. And DSP-based room equalization lets you answer a few simple questions in the free KEF Connect mobile app (for Apple® and Android™ devices) to tune the speakers to your listening space.

Uni-Q technology provides wide "sweet spot" 

The KEF LSX II features the 11th generation of KEF's patented Uni-Q driver, this places each speaker's tweeter in the acoustic centre of the bass/midrange cone. This allows the speakers to create a larger than normal "sweet spot" — the ideal listening position so that wherever you sit you can enjoy detailed, accurate, three-dimensional sound.

KEF LSX II Wireless HiFi Speakers Overview

• Class D Amplification in Bi-Amp design

• 11th generation Uni-Q driver for exceptional acoustic accuracy

• AirPlay2, Bluetooth, Google Chromecast built-in

• Digital signal processing

• Optimised cabinet design for best acoustic performance

• Roon ready

• 200w total amplifier power

• HDMI ARC, Toslink optical, USB-C  and 3.5mm analogue inputs

• RCA subwoofer output

• Hi-Res support

• Available in 6 different colours

• With mounting inserts to secure on KEF S2 Floor Stand (available as separate item)

KEF LSX II Wireless HiFi Speakers Specifications

Drive Units

Uni-Q Driver Array:
LF/MF: 115 mm (4.5 in.) magnesium/aluminium alloy cone
HF: 19 mm (0.75 in.) aluminium dome

Frequency Range (-6dB) Measured at 85dB/1m

49 Hz – 47 kHz
*Depends on EQ settings

Frequency Response (±3dB) Measured at 85dB/1m

54 Hz – 28 kHz
*Depends on EQ settings

Amplifier Output Power (Per Speaker)

LF: 70W
HF: 30W

Amplifier Class

LF: Class D
HF: Class D

Max SPL Measured at 1m

102 dB

Wireless Streaming Features

AirPlay 2
Google Chromecast
ROON Ready
UPnP Compatible
Bluetooth 4.2

Source Resolution

Network up to 384kHz/24bit

Optical up to 96kHz/24bit

Coaxial up to 192kHz/24bit

HDMI up to 1.411 Mbps PCM

*Depends on source resolution

Interspeaker Connection

Wireless: all sources resampled to 48kHz/24bit PCM

Wired: all sources resampled to 96kHz/24bit PCM

Supported Format (network)


Dimensions (HWD per Speaker)

240 x 155 x 180 mm (9.5 x 6.1 x 7.1 in.)

Power Input

100 – 240VAC 50/60Hz

Power Consumption

200W (operating power)
<2.0W (standby power)

Streaming Services

Spotify via Spotify Connect
Tidal via Tidal Connect
Amazon Music
QQ Music via QPlay
Internet Radio

*Depends on services availability in different countries

Primary Speaker Inputs

Analog 3.5mm Auxiliary
USB Type C
RJ45 Ethernet (network)
RJ45 Ethernet (interspeaker)


RCA Subwoofer output

Wi-Fi Network Frequency Band

Dual-band 2.4 GHz / 5 GHz

Secondary Speaker Inputs

RJ45 Ethernet (interspeaker)

  • Bookshelf
LSX II is small, perfectly forward, expansive in its functionality, features a well-implemented control app, looks the business and sounds the business too.
A fantastic, multi-talented streaming system perfect for smaller rooms....KEF’s taken what was already a winning formula, introduced some key upgrades that improve functionality and usability, and without really altering the speaker hardware has produced a talented set-up that sings with any genre of music sent its way...Nothing else really comes close at this level.
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