KEF LS50 Wireless II Speakers

LS50 Wireless II
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KEF LS50 Wireless II - The Ultimate Wireless HiFi Speakers

KEF LS50 Wireless II is more than a high-performance loudspeaker; it’s the perfect all-in-one speaker system, streaming from any source thanks to wireless compatibility with AirPlay 2, Chromecast and more, plus wired connections for your TV, games console and turntable. Great sound, no strings attached.

A customer favourite gets an upgrade

KEF's original LS50 Wireless speaker system made waves in the audio world winning multiple awards and was a huge hit with customers, offering impressive sonic fidelity in a convenient, self-powered package. The new LS50 Wireless II retains the sleek looks while making some important tweaks for even better performance. For starters, KEF has upgraded the built-in amplification with each tweeter now driven by a 100W Class A/B amplifier, delivering smooth, incredibly detailed treble performance whilst dedicated 280W Class D amplifiers power the mid/bass drivers to ensure room-filling, controlled sound even at higher volume levels.

Revolutionary sound absorption

LS50 Wireless II benefits from KEF's new and innovative Metamaterial Absorption Technology (MAT). It's a highly complex, maze-like structure that's tuned to absorb unwanted sound coming from the rear of the tweeter. The resulting sound is clear, purer, and more detailed. 

Multiple wireless music streaming options

These speakers are equipped with dual-band Wi-Fi® and Bluetooth® 4.2 as well as having AirPlay2 and Google Chromecast built-in. LS50 Wireless II are also Roon Ready and UPnP compatible. The free KEF Connect app offers access to popular music streaming apps, including Spotify® (via Spotify Connect), Tidal, Amazon Music, Qobuz, and Deezer. And internet radio and podcast listening are also available. 

Wired connections

The primary speaker in this pair is equipped with the following high-resolution digital inputs for connecting external components: HDMI eARC (24-bit/192kHz) for improving sound from a compatible TV, Toslink optical digital input (24-bit/96kHz), Digital coaxial input (24-bit/192kHz), RJ-45 Ethernet port for network connection (accepts signals up to 24-bit/384kHz)

There's also an analogue 3.5mm auxiliary input and a mono RCA subwoofer output. The speakers can be interconnected via Ethernet cable or wirelessly. (A wired connection allows higher-resolution 24-bit/192kHz playback.)

A room-filling "sweet spot," thanks to Uni-Q technology

KEF's patented Uni-Q technology places each speaker's tweeter in the acoustic center of the bass/midrange cone. That lets the LS50 Wireless II create a detailed, accurate, three-dimensional sound image. In essence, it makes the "sweet spot" — the ideal listening position — much larger. Sit wherever you like! It'll sound fantastic.

Careful cabinet design

The LS50 Wireless II's extremely rigid cabinet uses smooth, curved surfaces that help the sound radiate outward without distortion. It also features a patented offset, flexible port for reduced midrange coloration. As with previous LS50 models, the cabinet uses a grille-less design to show off the cool-looking driver array and super-stylish colour options.

Get the most out of your speakers

Proper speaker placement is also crucial to getting the best performance out of your LS50 Wireless IIs. KEF’s optional S2 floor stands place the speakers at an ideal height whilst helping to eliminate unwanted vibrations and reflections. 

KEF LS50 Wireless II Overview

• Metamaterial Absorption Technology eliminates 99% of high-frequency distortion for pure, natural sound

• 12th generation Uni-Q with MAT driver array for exceptional acoustic accuracy

• AirPlay2, Bluetooth, Google Chromecast built-in

• Patented off-set flexible port for reduced midrange coloration with exceptional levels of depth and detail

• Optimised cabinet design for best acoustic performance

• Roon ready

• 760w total amplifier power

• HDMI eARC, Toslink optical, digital co-axial and 3.5mm analogue inputs

• RCA subwoofer output

• Hi-Res support

• Available in 4 finishes

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

KEF LS50 Wireless II Specifications

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

40 Hz – 47 kHz
*Depends on EQ settings

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

45 Hz – 28 kHz
*Depends on EQ settings

Amplifier Output Power (Per Speaker)

LF: 280W
HF: 100W

Amplifier Class

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

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)

DSF: DSD64, DSD128

Dimensions (HWD per Speaker)

305 x 200 x 311 mm (12 x 7.9 x 12.2 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 (coming soon)
Internet Radio

*Depends on services availability in different countries

Primary Speaker Inputs

Digital Coaxial
Analog 3.5mm Auxiliary
USB Type A (service)
RJ45 Ethernet (network)
RJ45 Ethernet (interspeaker)


RCA Subwoofer output

Wi-Fi Network Frequency Band

Dual-band 2.4 GHz / 5 GHz

Secondary Speaker Inputs

USB Type A (service)
RJ45 Ethernet (interspeaker)

  • Bookshelf
As a product following in the footsteps of such a huge success, the KEF LS50 Wireless II arrive with a world of expectation on their shoulders – but they well and truly meet those expectations. Make no mistake, this is a sequel of rare quality.
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