he KEF LS50W MKII are What Hi-Fi? award-winning wireless speakers, with their 12th-generation Uni-Q driver array enabling a room-filling, three-dimensional sound image and wide ‘sweet spot’. This setup is enhanced by Metamaterial Absorption Technology (MAT) which effortlessly reduces any distortion, creating a live concert-like atmosphere in your own living space. KEF’s bespoke Music Integrity Engine, a collection of custom Digital Signal Processing algorithms, eliminates timing errors to offer excellent imaging and crossover. Additionally, you can expect incredible audio thanks to the two built-in amplifiers powering each driver individually, capable of delivering a total power output of 380W.
The multi-award winning LS50 Wireless sets the bar high for high-performance wireless speakers, and in the
same spirit of invention and innovation that created the original, the LS50 Wireless II is much more than just
a new generation.
The result of three years intensive research and development, the new KEF LS50 Wireless II is a fully active
wireless stereo speaker system that delivers pristine, KEF signature sound coupled with great usability
and high-performance wireless capability. LS50 Wireless II has been built on a whole new acoustic platform,
the LS50 Meta passive loudspeakers, while the brand-new wireless platform has been engineered from
the ground up. Active electronics, Digital Signal Processing (DSP), wireless streaming platform and the new
KEF Connect app all combine to set a new benchmark of class-leading acoustic and user experience.
FREEDOM
All the music, all the time
The new wireless platform that sits at the digital heart of the LS50 Wireless II ensures that no matter
how you like to listen to your music, you will be able to do so with the minimum of fuss and in fantastic
sound quality. LS50 Wireless II gives you direct access to your favourite music services, including Spotify
(via Spotify Connect), Tidal, Amazon Music, Qobuz and Deezer. You can even tune in to Internet Radio
Stations and catch up on the latest podcasts through the KEF Connect app. AirPlay 2 and Google
Chromecast seamlessly connects your compatible Apple or Android device, whilst Bluetooth expands the
options even further. There are also wired connections for your TV, turntable, CD player and games console,
via the HDMI, analogue, optical and coaxial inputs.
LS50 Wireless II has audiophiles covered with support for streaming music files up to 24bit/384kHz,
as well as MAQ, DSD256, and ROON Ready. These features mean that even the experienced hifi enthusiast
will marvel at this exceptional loudspeaker’s ability; LS50 Wireless II really does offer something to
everybody.
USER-CENTRED
Let you be you
Even beyond the flawless musical performance, the LS50 Wireless II is a breeze to set up, intuitive to use
and offers over-the-air firmware updates for bringing you new and improved features with the minimum of
fuss. You can choose to connect the speakers with the supplied cable (24bit/192kHz resolution) or wirelessly
(with 24bit/96kHz resolution) for a completely clutter-free set up. You can even select your favourite source
to wake up LS50 Wireless II whenever it comes on, giving you immediate access to your favourite source.
Plus, when using AirPlay 2, Chromecast or ROON you can stream to multiple speakers, so you can play music
all over your house. The brand-new dedicated KEF Connect app walks you through the
set-up and controls the system on a day-to-day basis, including intuitive sound settings, so you can tune
LS50 Wireless II to your own personal tastes.
PERFORMANCE
Most accurate, immersive sound
When it comes to physical technology, LS50 Wireless II takes its lead from KEF’s LS50 Meta passive
loudspeakers. A truly revolutionary tool in the KEF acoustic armoury, Metamaterial Absorption Technology1
(MAT) is a highly complex maze-like structure, where each of the intricate channels efficiently absorbs
a specific frequency. When combined, the channels act as an acoustic black hole, absorbing 99% of the
unwanted sound that comes from the rear of the tweeter, eliminating the resulting distortion and providinga purer, more natural sound.
Technical Specification
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 (-6dB)
measured at 85dB/1m
40Hz – 47kHz
*Depends on EQ settings
Frequency response (±3dB)
measured at 85dB/1m
45Hz – 28kHz
*Depends on EQ settings
Amplifier output power (per speaker) LF: 280W, HF: 100W
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 384kHz/24bit
Optical up to 96kHz/24bit
Coaxial up to 192kHz/24bit
HDMI up to 192kHz/24bit
*Depends on source resolution
Interspeaker connection Wireless: all sources resampled to 96kHz/24bit PCM
Wired: all sources resampled to 192kHz/24bit PCM
Supported format (all inputs) MP3, M4A, AAC, FLAC, WAV, AIFF, ALAC, WMA, LPCM and Ogg Vorbis
Supported format (network) MAQ
DSF: DSD64, DSD128, DSD256
DFF: DSD64
Dimensions (HWD per speaker) 305 x 200 x 311 mm (12.0 x 7.9 x 12.2 in.)
Weight (per set) 20.1kg (44.31lbs)
Power input 100 – 240VAC 50/60Hz
Power consumption 200W (operating power)
<2.0W (standby power)
Primary speaker Secondary speaker
Inputs HDMI eARC
TOSLINK Optical
Digital Coaxial
Analog 3.5mm 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
