LS50 Wireless II – Wireless HiFi Speakers
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 of 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.
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 a 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 (coming soon). 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.
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 (coming soon) 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 setup 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.
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 colouration, 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 fit comfortably into your living space when it comes to style. The low diffraction, the 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 become even more impactful.
Summary of features
FREEDOM – all the music, all the time
• Play all major music services and supports all major audio formats
• Wireless both from source and between the speakers
• Comprehensive applications and connectivity
USER-CENTRED – let you be you
• Intuitive onboarding with user-centred features
• Personalised listening experience via KEF Connect App
PERFORMANCE – most accurate, immersive sound
• Metamaterial Absorption Technology for pure, natural sound
• 12th generation Uni-Q with MAT for exceptional acoustic accuracy
• Music Integrity Engine for rich, full-bodied sound
• System power: LF 280W class D, HF 100W class A/B, Max. SPL: 108dB
DESIGN – Attention to every detail
• Optimised cabinet design for best acoustic performance
• Available in 4 finishes
• With mounting inserts to secure on KEF S2 Floor Stand (available as a separate item)
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 (coming soon), UPnP Compatible, Bluetooth 4.2
Streaming services: Spotify via Spotify Connect, Tidal, Amazon Music, Qobuz, Deezer, QQ Music via QPlay (coming soon), Internet Radio, Podcast *Depends on services available 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 the 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
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)
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