KEF LS50 Wireless II - Wireless Speaker System
The multi-award-winning LS50 Wireless speaker system had already set the bar high for performance wireless speakers.
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.
LENC's KEF LS50 Wireless II Review:
With the first generation KEF LS50 Wireless being one of the best active speaker's we'd come across here at Living Entertainment, the LS50 Wireless II had some serious shoes to fill.
Upon first listen, it was evident that KEF had taken everything that was great about the Gen I and improved on it in almost every way. The refinements in materials, connectivity and overall design have taken them to another level of performance and user experience.
The dynamics, detail and bass response produce an immersive and stunning audio experience that truly bridges the gap between digital products and dedicated Hi-Fi. In everything from streaming and movies to traditional components - the KEF LS50 Wireless II make it easy in every way and are outstanding at every turn.
Darcy (our Website Manager) didn't hesitate in securing a pair for himself as soon as they came available and will be happy to sing their praises to you if you'd like to chat about them!
Curious about whats in the box? Check out our unboxing video!
Dive in below to find out about all of the key details and improvements for the KEF LS50 Wireless II.
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 MQA Decoding, DSD256, and Roon Ready. These features mean that even the experienced hi-fi enthusiast will marvel at this exceptional loudspeaker’s ability; LS50 Wireless II really does offer something to everybody.
Let you be you
Even beyond the flawless musical performance, the LS50 Wireless II speaker system 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.
Engineered With Care:
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 providing a purer, more natural sound.
KEF’s Uni-Q point source configuration delivers a more detailed, accurate and integrated three-dimensional sound image, which is dispersed so evenly throughout the room that the ‘sweet spot’ is wherever you are in the room. Using simulation and analysis tools, our engineers have developed the 12th generation Uni-Q with MAT driver array, to reduce high-frequency distortion in the mid-frequency driver. The result is reduced coloration, less distortion and a sound that is more transparent and life-like than previously possible. The other frequencies are equally well served, with crystal clear midrange and room-filling, deep and articulate bass.
The performance of LS50 Wireless II is aided by KEF’s bespoke Music Integrity Engine, a cutting-edge collection of bespoke Digital Signal Processing algorithms optimised for the new Uni-Q with MAT driver array, enabling it to deliver a perfectly timed performance, for better imaging and a tighter, unsmeared sound.
LS50 Wireless II also has plenty of power on tap. Each tweeter benefits from being driven by a new 100W class A/B amplifier that delivers a smooth, incredibly detailed treble performance. Dedicated 280W class D amplifiers power the mid/bass drivers, for room-filling, controlled sound. The diligent amplifier development has all been undertaken in-house by KEF, in order to completely control the quality of power on offer. The end result of this tireless effort is sensationally dynamic sound, with the music’s subtle ebb and flow delivered in all its glory.
Attention to every detail
The LS50 Wireless II will also fits comfortably into your living space when it comes to style. The low- diffraction, curved baffle is precision modelled around the Uni-Q driver array, while eye-catching heat sinks and colour-matched ports are located on the well-equipped rear. LS50 Wireless II is available in three matt finishes, Carbon Black, Titanium Grey, Mineral White as well as a Crimson Red Special Edition. All the colours are mirrored on both the drive units and the rear-facing port means the LS50 Wireless II looks fantastic from any angle.
On the LS50 Wireless II’s underside, each corner has a threaded inset allowing the speaker to lock onto the top of the new KEF S2 Floor Stands, which also boast integrated cable management and a mass-loadable column. The stands are all colour matched to your finish of choice.
For even more impact and bass extension, LS50 Wireless II features two subwoofer outputs, one on each speaker. When paired with KEF’s KUBE range or KF92 subwoofers, music and film becomes even more impactful.
Pair this with:
To truly make the most out of your KEF LS50W MKII Active Speakers we recommend pairing them up with the KEF S2 Speaker Stands to keep your system looking neat and tidy while also maximising the impact of your sound.
|Primary speaker||Secondary speaker|
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
|Wi-Fi network frequency band||Dual-band 2.4 GHz / 5 GHz|
|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)||MQA: MQA Core Decoder
DSF: DSD64, DSD128, DSD256
|Dimensions (HWD per speaker)||305 x 200 x 311 mm|
|Weight (per set)||20.1kg|
|Power input||100 – 240VAC 50/60Hz|
|Power consumption||200W (operating power)
<2.0W (standby power)